JPH06105415A - Switchboard door handle device - Google Patents

Abstract

PURPOSE:To prevent a door from coming off by the expansion of the inner pressure of a closed switchboard at short circuit accident of a main circuit by equipping it with a catch for engaging with the L-shaped part of a latch during the lock of a door, being installed in the box of a switchboard. CONSTITUTION:A catch 5, which catches a latch 3, is attached to the box 4 of a closed switchboard. In case that a door 1 is closed, the latch 3 is coupled with the latch 3. If any accident occurs at this time and the inner pressure of the closed switchboard rises, the door 1 seeks to open by the expansive force, but the L-shaped curve 3a at the top of the latch 3 catches on the projection 5a of the catch 5 and is locked firmly, so the door 1 is not released. Hereby, the release of the door 1 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door handle device for a switchboard used for power distribution equipment.

[0002]

2. Description of the Related Art Opening and closing the door of a conventional high-voltage closed type switchboard
It is performed with a twisting handle device. FIG. 3 is a cross-sectional view of a state in which the door is provided in a conventional closed type switchboard. Reference numeral 1 is a door of a closed type switchboard, 2 is a handle device, 3 is a latch connected to the handle, and 4 is a box of the closed type switchboard.
FIG. 4 is a diagram of FIG. 3 viewed from the front of the switchboard.

Next, the operation will be described. 1 and 2, when the handle device 2 is in the vertical state (shown by the solid line in FIG. 4), the latch 3 is caught by the box body 4, and the door 1 is closed and locked. Now, when the handle device 2 is twisted to the horizontal state (shown by the one-dot chain line in FIG. 4), the latch 3 is disengaged from the box body 4, so that the door 1 can be unlocked and opened.

[0004]

Since the handle device of the conventional closed type switchboard is configured as shown in FIG. 3, if a main circuit short circuit accident occurs in the closed switchboard for some reason, the closed switchboard is closed. The pressure inside shows a sharp rise. Due to this expansion force, the conventional door handle device with weak locking force bends the latch into a V shape due to internal pressure expansion,
There was a problem that it came off and the door opened, causing a secondary disaster.

The present invention has been made in order to solve the above-mentioned problems, and it is a solid structure that prevents the latch of the door handle device from coming off due to the pressure expansion force inside the closed switchboard when the main circuit of the closed switchboard short-circuits. The purpose is to obtain a handle device.

[0006]

A handle device for a switchboard according to the present invention is provided with an L-shaped portion or a notch portion at a tip portion of a latch.

[0007]

The L-shaped portion or notch of the latch end of the handle device engages with the receiver against expansion of the door due to abnormal pressure rise inside the switchboard, preventing the door from opening. To do.

[0008]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the handle device 2 includes a door 1
The handle shaft 2a is connected to the latch 3. On the other hand, the box 4 of the closed switchboard has a latch 3
The money received 5 is attached to the hook. Next, the operation and operation of the present invention will be described. In FIG.
When the door 1 is closed, the latch 3 is in connection with the catch 5. At this time, if some kind of accident occurs and the pressure inside the closed switchboard rises, the door 1 tries to open due to the expansion force, but the bend 3a of the L-shaped part at the tip of the latch 3 is the protrusion of the receiver 5. The door 1 is not opened because it is caught by 5a and is firmly locked.

Example 2. In the above-described embodiment, the latch 3 is stopped by the catch 5. However, the same effect can be obtained even if a part of the closed switchboard is deformed to form a projection such as the catch 5. .

Embodiment 3. Further, in the above embodiment, the L-shaped portion of the latch tip is bent L, but as shown in FIG. 5, a notch is provided at the latch tip, and the notch and the gate-shaped metal receiver are provided. May be engaged.

Embodiment 4. In the third embodiment, a notch is provided at the end of the latch, and the notch is engaged with the gate-shaped metal receiver. However, as shown in FIG. It may be a shape.

[0012]

As described above, according to the present invention, since the L-shaped portion or the notch portion is formed at the tip of the latch so as to be engaged with the receiver, the switchboard having a strong locking ability. The door handle device can be obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view and a rear view of a door handle device according to an embodiment of the present invention.

FIG. 2 is a bottom view of FIG. 1 (b).

FIG. 3 is a side sectional view and a rear view of a conventional door handle device.

FIG. 4 is a bottom view of FIG.

FIG. 5 is a side sectional view and a rear view of a door handle device according to another embodiment of the present invention.

FIG. 6 is a side sectional view and a rear view of a door handle device according to still another embodiment of the present invention.

[Explanation of symbols]

 1 door 2 handle device 2a handle shaft 3 latch 3a L-shaped part 4 box 5 receiving

Claims (2)

[Claims] 1. A handle shaft rotatably provided through a door of a switchboard, a handle mounted on the handle shaft on the front surface of the door to rotate together, and a handle shaft mounted on the handle shaft. A switchboard including at least a latch that rotates together and has an L-shaped portion formed at its tip, and a receiver that is mounted on a box of the switchboard and that engages with the L-shaped portion of the latch when the door is locked. Door handle device. 2. A handle shaft rotatably provided through a door of a switchboard, a handle mounted on the handle shaft on the front surface of the door and rotatable together, and a handle shaft mounted on the handle shaft. A door of a switchboard provided with at least a latch that rotates together and has a notch at its tip, and a receiver that is mounted on a box of the switchboard and that engages with the notch of the latch when the door is locked. Handle device.