JPS6026411Y2 - locking device - Google Patents

Description

[Detailed explanation of the invention] This invention is an NFB used in control centers, etc.
The present invention relates to a lock device in a breaker operating device such as a No Fuse Breaker.

FIG. 1 is a perspective view of a conventional NFB operating device as seen from the door surface, and FIG. 2 is a bottom view showing a part of the device in cross section.

In the figure, 1 is a door, IA is an opening provided in a part of this door, 2 is an NFB provided on the back side of this door opening, 2
A is the NFB bundle attached to this NFB.

The conventional device is configured as described above, and the NFB is lowered from the door surface.
Since it is a simple device that requires easy operation and does not have a locking device, the door can be easily opened when the operation is ON, and there is a risk of touching the conductive parts.

The purpose of this invention is to improve the drawbacks of the conventional devices as described above, and to provide a locking device that can lock the door when the circuit breaker is turned on.

An embodiment of this invention will be described below with reference to FIGS. 3 to 5.

Figure 3 is a front view with the door 1 omitted when the NFB operation is OFF, Figure 4 is a front view with the door 1 omitted when the NFB operation is ON, and Figure 5 is a cross section of a part of Figure 4. FIG.

In the figure 1. IA, 2.2A shows the same or equivalent parts as in Figures 1 and 2, 1B is a metal fitting attached to the back of door 1, and 3 is attached to NFB 2 so as to protrude from opening 1A of door 1. 3A is the opening provided in this operation name plate, 3B is the lever shaft provided in the operation name plate 3, 4 is a parallel movement plate attached to the NFB bundle 2A, 4A is this parallel movement pin attached to the plate,
Reference numeral 5 denotes a lever that uses the lever shaft 3B as a fulcrum and the hook engages with the metal fitting IB, and 5A is provided on this lever and connects the pin 4.
This is a groove that accepts A and slides it.

In the above configuration, the operation name plate 3 attached to the NFB 2 is provided with an opening 3A in the center;
The NFB bundle 2A can be operated more easily.

A parallel displacement plate 4 is attached between the NFB 2 and the operation name plate 3, and an opening through which the NFB bundle 2A passes is provided in the center of the parallel displacement plate 4.
Due to the movement, the translation plate 4 also moves in the same way and moves in parallel.

For this reason, a round bar-shaped pin 4A attached to the parallel displacement plate 4
slides in the groove 5A of the lever 5 attached to the lever shaft 3B with a part of the operation name plate 3 as the fulcrum.

The locking device configured as above is shown in Fig. 3.
It is not locked when the operation of FB2 is OFF, but is locked when the operation of NFB2 is ON as shown in FIG.
Prevent door 1 from opening.

Now, when the NFB bundle 2A is switched from operation OFF to operation ON (Fig. 4), the pin 4A of the translation plate 4 moves in parallel due to the operation of the NFB bundle, and the pin 4A of the lever 5 moves in parallel.
Slide inside.

Since this groove 5A is formed at an angle with respect to the translation plate 4, the lever 5 moves by an amount corresponding to the angle.

In this way, when the NFB 2 is activated, the lever 5 protrudes from the side surface of the operation name plate 3.

This lever 5 protrudes from the door 1 as shown in FIG.
The Z-shaped hook attached to the NFB engages with the metal fitting 1B.
Locks the door so that it does not open when operation 2 is ON.

Further, when the NFB2 operation is OFF, the parallel moving plate 4 moves in the opposite direction, thereby retracting the protruding lever 5 and unlocking the door 1.

In the above embodiment, the parallel displacement plate 4 is provided with a pin and the lever 5 is provided with a groove, but conversely, the parallel displacement plate 4 may be provided with a groove and the lever 5 may be provided with a pin, or the lever 5 may be provided with a groove. Other mechanisms for extending or retracting can also be used.

Note that although the above embodiment has been described with respect to an NFB, the present invention is applicable to an operating device that uses a general circuit breaker.

As described above, according to this invention, since the door can be closed when the breaker is ON, it is possible to prevent the door from touching the live parts when the door is opened, and it is also possible to prevent the door from touching the live parts by opening the door. Since the lever can lock the door at the farthest point from the support shaft, there is less damage to the engaging part, and the lever engages while pressing the parallel plate almost horizontally. Effects such as preventing the breaker bundle from moving downward and malfunctioning due to the weight of the parallel moving plate can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional NFB operating device as seen from the door surface, Fig. 2 is a bottom view showing a part of it in cross section, Figs. FIG. 4 is a partially sectional front view, and FIG. 5 is a partially sectional bottom view. In the figures, the same reference numerals indicate the same or corresponding parts, 1
is the door, IB is the hook, 2 is the NFB, 2A is the NFB bundle, 3 is the operation name plate, 3A is the opening, 3B is the lever shaft,
4 is a translation plate, 4A is a pin, 5 is a lever, and 5A is a groove.

Claims (2)

[Scope of utility model registration request] (1) An operating name plate provided at the opening of the door, a breaker bundle provided so that it can be operated from the opening of this operating name plate, and a breaker handle provided so as to move in the same direction. A lock having a parallel movement plate, a fulcrum on the operation name plate, a lever for engaging a metal fitting for the door hook, and a mechanism for protruding or retracting the lever by movement of the parallel movement plate. Device. (2) The mechanism for protruding or retracting the lever includes a groove provided in the lever and a pin provided in the parallel displacement plate to be inserted into the groove.
Locking device as described in section.