JPH0244629A - Breaker for wiring - Google Patents

Abstract

PURPOSE:To facilitate installation of an appendix device by forming a coupling part of a functional member with the appendix device with possibility of coupling by unidirectional motion of the functional member toward a cover, and forming a cutoff window in a part of cover so as to allow insertion from outside. CONSTITUTION:A guide groove 2a offering a guide surface to guide insertion of a guide boss 4a on an appendix device is formed at the inside of the peripheral edges of a cutoff window of a cover 2 of a breaker 1 for wiring, and thereby the appendix device 4 penetrates the cutoff window to be coupled with an internal functional member. The side face of the cover 2 is cut, and a lead 4a is drawn out using this notch. After incorporation of appendix device in this fashion, a lid 6 is inserted to another guide groove 2b formed in parallel with the surface of the cover 2 so as to block the cutoff window and also fix the appendix device substantially sturdily.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a main contact mechanism, an opening/closing mechanism, etc. in a space formed by a case whose front side is open and a cover that covers the front side of the case. The present invention relates to a structure for incorporating the accessory device in a molded circuit breaker which accommodates the functional member and accessory devices such as an auxiliary switch that operates in conjunction with the main contact, and a trip device that trips and controls the opening/closing mechanism.

[Conventional technology]

A molded case circuit breaker is equipped with various auxiliary devices depending on its purpose and use. The attached devices include an auxiliary switch that electrically detects whether the main contact of the circuit breaker is open or closed, a warning switch that electrically detects automatic interruption due to overcurrent, and a switch that trips the circuit breaker from a distance. There are voltage string disconnection devices, or undervoltage disconnection devices that trip the circuit breaker when the main circuit voltage drops.In recent years, with the spread of equipment automation, accessory devices have been attached to molded circuit breakers. The degree of this is increasing.

FIG. 5 shows an example of the structure of an auxiliary switch (conventional type) as a representative example of an accessory device. As an auxiliary switch of this kind, the contact l of the microswitch 11 is connected via the actuator 13 from the opening/closing mechanism of the main contact of the molded circuit breaker.
The circuit breaker case is configured to transmit this information.
It is generally known to have a structure in which the circuit breaker is completed only after it is fixed by screwing or inserting through the base 12 and then covered with a cover.

[Problem to be solved by the invention]

In this way, by opening the cover on the front side of the circuit breaker case and fixing the accessory device inside the case while checking the relationship with the functional components such as the main contact mechanism and opening/closing mechanism, the connection between the accessory device and the functional component can be established. The problems of the conventional molded case circuit breaker obtained are as follows.

That is, (1) ffl, the cover of the circuit breaker that has already been adjusted, tested, and packaged as a finished product must be opened again and the accessory equipment installed when an order is placed.

Furthermore, since the cover must be opened or removed during installation, the opening/closing mechanism and the tripping mechanism that has already been installed and adjusted are exposed, so an expert must pay close attention to the installation. However, there were problems such as the number of workers being limited.

(2) Depending on the order, it may be necessary to assemble and test each accessory device at the same time as the circuit breaker main body from the beginning, and in this case, the trouble twice as described in (1) above can be avoided, but In the factory, in step 11, which is the process of testing immediately following the production of the circuit breaker body as described in item (1), there is a process of incorporating the accessory equipment following the production of the circuit breaker, and a process of installing the circuit breaker with the accessory equipment installed. There is a separate production testing process consisting of the process of testing the equipment, and as these processes are mixed together during production, there are difficulties in responding to requests for short delivery times and reducing man-hours (process type and time). .

(3) Changes in specifications, etc. (In some cases, the attached equipment that has been incorporated may be changed. In this case, the assembly will be performed while looking at the relationship with the new functional components, so it will take a lot of time and care to assemble it.) Requires.

The object of the present invention is to provide a molded case circuit breaker which allows attachment of accessory devices to be easily installed without removing the cover of the molded circuit breaker and which does not require a skilled person to install, in order to solve the above problems. The goal is to provide the following.

[Means to solve the problem]

In order to solve the above problems, according to the present invention, functional components such as a main contact mechanism, an opening/closing mechanism, etc. A molded circuit breaker that houses accessory devices such as an auxiliary switch that works with the main contact, a tripping device that trips and controls the opening/closing mechanism, and the connection part between the functional cap and the accessory device is a functional member. The attached device is formed at the joint GO by a one-way operation such as insertion or fitting on the cover side of the cover side and perpendicular to the cover surface, and the accessory device is inserted from the outside into the part of the cover opposite to this joint part. A possible cutout window is formed, and a guide surface perpendicular to the cover surface for insertion of the R device is attached to the inner side of the periphery of the window, and a lid for closing the cutout window after insertion of the accessory device is parallel to the cover surface. for inserting into.

The structure is such that a guide groove is formed parallel to the cover surface.

[Effect]

In addition to configuring the wiring adapter in this way, the external shape and dimensions of the attached devices are unified, and the device is formed on the cover of the circuit breaker.
After inserting the attached device along the guide surface formed inside the periphery of the cutout and inserting or fitting the connecting part into the internal functional member to connect it with the functional member, If you insert the lid along the guide groove,
The mounting m is substantially immovably fixed to the connecting position t with the functional member.

Therefore, all accessory devices can be installed and removed through this cut-out window, and it is possible to install accessory devices for each order into a molded circuit breaker that is already packaged as a finished product, or change the already installed accessory devices from the beginning. This makes it extremely easy to assemble into the 3a disconnector, including the incorporation of accessory devices, making it possible to meet pressure delivery deadlines and reduce man-hours.

〔Example〕

An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

Here, FIG. 1 is an exploded perspective view of the molded circuit breaker according to this embodiment, and FIG. 2 is a perspective view showing the assembled state. The accessory device 4 is formed as a box with a guide protrusion 4a formed therein, and a lead 4b is drawn out from one side of the box. On the other hand, on the inner side of the periphery of the cutout window of the cover 2 of the molded circuit breaker 1, a guide surface 2a is formed to provide a guide surface for guiding the insertion direction of the guide protrusion 4a of the attached device. The cutout window is inserted through the window and connected to the internal functional components. Note that the cutout window is cut out on the side surface of the cover 2, and the lead 4a is pulled out using this cutout. After this installation of the accessory device, the lid 6 is inserted into the guide 2b formed parallel to the plane of the cover 2 to close the cut-out window and to fix the drawing device substantially immovably.

FIG. 3 shows a more detailed structure of the lid 6. The lower surface of the lid 6 made of deformable thermoplastic resin has a low height 4
When the lid is inserted into the cover 2, the lower surface of the lid presses down the guide projections 4a of the attached device, and the projections 6a catch on the inner surface of the side wall 2c of the cover 2.
It forms a stopper. In addition, the code 6b in the figure is
A protrusion having the same shape as the notch 2d on the side wall of the cover 2 is shown.

FIG. 4 shows how to use the lid 6 when no accessory equipment is incorporated into the molded circuit breaker. By inserting the lid 6 into the cover 2 with the protrusion 6b, which has the same shape as the notch 2d, in front, the notch 2d is closed and foreign matter is prevented from entering from the outside.

In this embodiment, only one cutout window is formed in the cover, but it is of course possible to have a plurality of cutout windows depending on the type of accessory device and its appropriate coupling site.

〔Effect of the invention〕

As described above, according to the present invention, functional components such as the main contact mechanism and the opening/closing mechanism are installed in the space formed by the case whose front side is open and the cover that covers the front side of the case. , a molded circuit breaker that accommodates accessory devices such as an auxiliary switch that works with the main contact, a tripping device that trips and controls the opening/closing mechanism, and a cover where the connecting part of the functional member and the accessory device is the functional member. side and perpendicular to the cover plane.

The cover is formed so that it can be connected by a one-way operation such as insertion or fitting, and a cutout window is formed in the part of the cover opposite to this connection part through which the attachment device can be inserted from the outside, and the attachment device is attached inside the periphery of the window. a guide surface perpendicular to the cover surface for insertion of the accessory device, and a guide groove parallel to the cover surface for inserting the lid that closes the cutout window (after inserting the attached device) parallel to the cover surface. By unifying the external shapes and dimensions of the attached devices, all attached devices can be attached or removed through the cutout window, and attachment or modification of attached devices can be done without removing the cover. Therefore, of course, when specifications are given from the beginning of production and accessory equipment is installed from the beginning,
It becomes extremely easy to install accessory devices for each order into a molded circuit breaker that is already packaged as a finished product, and to change the already installed accessory devices, which greatly reduces the time required to assemble accessory devices. In addition, unlike when removing the cover to install accessory equipment, there is no need for a trained person to make adjustments, and there is no need to retest the circuit breaker itself, making it extremely easy to meet demands for short delivery times. becomes possible.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are an exploded perspective view and an assembled perspective view of a molded circuit breaker according to an embodiment of the present invention, respectively;
FIG. 3 shows the detailed structure of the lid that closes the cutout window of the cover, in which (a) is a side sectional view and (b) is a front view. Figure 4 shows how to use the lid when no accessory device is installed, (al is a side sectional view showing the orientation of the lid in this case, (bl is a front view), It is a front view showing the configuration of an auxiliary switch as an accessory device. 1... Jl device for wiring, 2... Cover 2a, 2b.
...Before guidance, 3. Case, 4. Attached equipment, 6.
··lid. 4 Attached award diagram (CI) (b)

Claims (1)

[Claims] 1) In the space formed by the case whose front side is open and the cover that covers the front side of the case, there are functional components such as a main contact mechanism, an opening/closing mechanism, an auxiliary switch that interlocks with the main contact, and an opening/closing mechanism. In a molded circuit breaker that accommodates an accessory device such as a tripping device for tripping and controlling the circuit breaker, the connection part between the functional member and the accessory device is inserted or fitted on the cover side of the functional member and in a direction perpendicular to the cover surface. It is formed so that it can be connected by one-way operation such as alignment, and this connection,
A cutout window through which the accessory device can be inserted from the outside is formed in the part of the cover facing the part, and a guide surface perpendicular to the cover surface for inserting the accessory device is provided inside the periphery of the window, and a guide surface perpendicular to the cover surface for inserting the accessory device, and A molded circuit breaker characterized in that a guide groove parallel to the cover surface is formed for inserting a lid for closing the cutout window parallel to the cover surface.