JP3100032B2 - Electrical equipment storage case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device storage case provided with a pressure relief cover which operates when an internal pressure is abnormally increased to release the internal pressure.

[0002]

2. Description of the Related Art Conventionally, a high-voltage distribution device installed on a high-voltage distribution system has a cover mounting portion that opens the cover in order to release the internal pressure when the internal pressure rises abnormally due to a short circuit accident or the like. A pressure relief mechanism was provided. FIG. 9 shows a specific example, in which FIG. 9A is a front view and FIG. 9B is a side view. In the figure, a plurality of bolts 3 are provided around the periphery of the cover 2 for mounting the cover 2 on the case body 1 of the power distribution device for pole installation.
And the upper mounting pitch is made larger than the other parts so that the pressure is easily concentrated, so that the upper bolts 3a and 3b are easily detached. Therefore, when the internal pressure of the case main body 1 rises and reaches a certain value due to a short circuit accident or the like, the bolts 3a and 3b of the upper structure of the cover 2 easily come off as shown in FIG. 10, and the cover 2 starts to open from the upper end. Further, by providing an L-shaped stopper metal fitting 4 in advance on the outside of the cover 2 from the main body 1 side, the cover 2 pushed out by the internal pressure comes into contact with the tip of the stopper metal fitting 4. It is restricted so that it can move only to that position.

[0003]

However, in the conventional cover pressure release mechanism described above, since the stopper fitting 4 is attached to the main body 1 side, the stopper fitting 4 corresponds to the lift at the time of opening the cover in a preset manner. And the outer dimensions of the case body 1 increase accordingly. In addition, since the stopper fitting 4 protrudes from the cover 2 in a normal state, it is inferior in handleability, and accordingly, there is a problem that the number of steps for installing the main body 1 increases. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to eliminate the projecting portion of a stopper of a pressure release mechanism of a cover and to improve the handleability of the electric device storage case. Is to provide.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a pressure relief cover for covering an opening formed on one surface of a case body with a pressure relief cover. The mounting strength is adjusted so that a part of the pressure relief cover can be opened, the periphery of the pressure relief cover is fixed to the case body with a plurality of bolts, and a stopper fitting for limiting the opening of the pressure relief cover is provided. In the electrical equipment storage case, it is integrally supported and fixed to the outer periphery of the pressure relief cover.
Mounting at the tip parallel to the direction of movement when opening the pressure relief cover
More than bolts inserted into the mounting surface
Stopper bracket with large-diameter bolt holes and case
It is supported and fixed on the body side and contacts the mounting surface of the stopper bracket
And a bolt hole is drilled in the area that comes into contact with the mounting surface.
Connection fittings, bolt holes and stopper fittings of the connection fittings
Bolt inserted into the bolt hole of
And the nut that secures the connection fitting and the stopper fitting.
It is characterized by having.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of an embodiment in which an electric device storage case according to the present invention is applied to a power distribution device for installation on a pole, FIG. 2 is a bottom view of FIG. 1, and FIGS.
FIG. 6 is an enlarged view of main parts A to C of FIG. 1, and FIG. In the figure, when attaching the cover 12 to the case main body 11 housing the power distribution equipment, the periphery is fixed with a plurality of bolts 13 and the mounting pitch at the upper part is made larger than other parts, so that the upper bolts 13a, The bolt 13a, 13b is easily detached by making it easy for pressure to concentrate on 13b.

That is, the bolts 13a and 13b are
As shown in FIG. 2, a U-shaped bracket 14 is attached to the cover 12.
It is mounted by welding so that the open end is on the outside, and the bolt 13b or the like is inserted and fixed on the inside thereof. Therefore, when the cover 12 is pushed outward due to an increase in the internal pressure, the bolts 13 b and the like easily come off from the open end of the metal fitting 14. On the other hand, as shown in FIG. 5, the lower bolt 13 is formed by attaching a U-shaped bracket 15 to the cover 12 by welding so that the open end is on the inner side.
Since the bolt 13 is inserted into and fixed to the inner hole, the bolt 13 is less likely to fall off than the bolts 13a and 13b. That is, if the bolts 13a and 13b come off from the metal fitting 14 first when the cover 12 is pushed out by the internal pressure, the bolt 13 becomes difficult to be detached from the metal fitting 15, and even if the cover 12 The opening is formed without scattering from the main body 11.

On both sides below the bolts 13a and 13b, stopper fittings 16 are provided as shown in FIG.
The cover 12 is attached to the outer peripheral surface by welding. The other end of the stopper fitting 16 is formed in parallel with the operating direction of the cover 12 (vertical direction in the figure). On the other hand, a connection fitting 17 having a surface that comes into contact with the stopper fitting 16 is attached to the body 11 by welding. The stopper fitting 16 and the connection fitting 17 are fixed by a nut 19, a flat washer 20, and a spring washer 21 by inserting a bolt 18 into holes 16 a and 17 a formed in both. Here, hole 1
By making 6a sufficiently larger than the diameter of the bolt 18, the stopper fitting 16 can be moved when the cover 12 is opened. The moving distance is determined by the size of the hole 16a and the diameter of the bolt 18. The stopper 16 can be moved in the same manner even when the hole 16a or the hole 17a is a long hole.

FIGS. 7 and 8 are explanatory views showing operating states. When the pressure in the main body 11 rises due to a short circuit of the internal power distribution equipment, the cover 12 is pushed out and the central portion in the width direction rises. The metal fitting 14 comes off because the pressure is concentrated on the bolts 13a and 13b at the same time when both ends of the cover 12 move relatively inward. Next, the pressure on the cover 12 concentrates on the stopper fitting 16, and the stopper fitting 16 slides on the contact surface of the connection fitting 17, and moves at a stroke over the distance allowed by the hole 16a. As a result, the upper end of the cover 12 is separated from the main body 11 and opened. In this way, the internal pressure is released from the opening,
The inside of the main body 11 returns to normal pressure, and the stopper fitting 16 can also prevent the cover 12 from being opened too far away from the main body 11. Further, the cover 1
Since the upper end of 2 does not protrude from the main body 11,
It is easier to handle than a cover with a conventional structure, and the workability of installation work is also improved. The present invention is similarly applicable to a storage case of an electric device other than the power distribution device.

[0009]

As described above, according to the present invention, the stopper fitting for regulating the opening range of the pressure-releasing cover during opening operation is formed on the pressure-releasing cover side. It does not protrude outward, so that the handleability is improved and the workability of the installation work of the main body is improved.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment according to the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is an enlarged view of a main part A of FIG. 1;

FIG. 4 is an enlarged view of a main part B of FIG.

FIG. 5 is an enlarged view of a main part C of FIG. 1;

FIG. 6 is a view showing a single unit of a pressure release cover in FIG. 1;

FIG. 7 is an explanatory diagram showing the operation of the embodiment.

FIG. 8 is an explanatory diagram showing the operation of the embodiment.

FIG. 9 is a diagram showing a conventional example.

FIG. 10 is a diagram showing an operation of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Case main body 12 Cover 13 Bolt 13a, 13b Bolt 14, 15 Bracket 16 Stopper bracket 16a hole 17 Connection bracket 17a hole 18 Bolt 19 Nut

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 50-45660 (JP, U) JP-A 53-146035 (JP, U) JP-A 1-134908 (JP, U) JP-A 50-46 23648 (JP, U) Japanese Utility Model Showa 50-128666 (JP, U) Japanese Utility Model Showa 51-37225 (JP, U) Japanese Utility Model Utility Model 52-121649 (JP, U) Japanese Utility Model Utility Model 1-92743 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) H02B 1/26-1/28 H01H 33/575 H05K 5/03-5/06

Claims (1)

(57) [Claims] An opening formed on one surface of a case main body is covered by a pressure relief cover, and the mounting strength is adjusted so that a part of the pressure relief cover can be opened when the internal pressure of the main body increases. The periphery of the pressure cover is fixed to the case body by a plurality of bolts, and an electric device storage case provided with a stopper fitting for restricting the opening of the pressure release cover. A stopper fitting that has a mounting surface parallel to the direction of movement of the pressure relief cover when it is opened and that has a bolt hole with a diameter sufficiently larger than the bolt inserted through the mounting surface. And supported and fixed on the case body side, and mounting the stopper bracket
Face and with contact bolts to the mounting surface abutting portion
Insert the connection fitting with the hole, the bolt hole of the connection fitting and the bolt hole of the stopper fitting.
The bolt to be threaded and the connection fitting and stopper fitting fixed by being screwed into the bolt
An electrical device storage case, comprising: