JPH0417002B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an outer case structure for electrical equipment, and particularly to an outer case structure for electrical equipment such as a switch.

[Conventional technology]

Electrical equipment installed on the ground such as on the road, for example,
Switches and the like are often protected by an outer box called a cabinet. To open or close this switch, open the door provided on the outer box and attach the operating handle to the mechanism. When the opening/closing operation is finished, remove the operating handle and close the door. to finish the work.
Furthermore, when performing work on the cable connected to the switch (protruding from a manhole or handhole), the outer box is removed to expose the switch and the cable connection.

[Problem to be solved by the invention]

However, according to the outer box structure of conventional switches, when removing the outer box, it is necessary to lift the outer box upward,
Since it must be lifted, a large external force is required, which poses problems in workability, safety, etc.
This is a problem that occurs not only during cable construction, but also when replacing the outer box.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an outer box structure that allows operations such as attaching, detaching and moving the outer box to be easily performed, and also allows easy connection of cables and operation of electrical equipment.

Another object of the present invention is to provide an outer box structure for electrical equipment that is highly workable and safe.

Another object of the present invention is to provide an outer casing structure for electrical equipment that not only solves the conventional problems according to the above-mentioned objects, but also provides effects such as watertightness.

[Means to solve the problem]

The present invention has been made in view of the above, and in order to achieve the above object, the main body is formed from four sides integrated from three sides and the back, and the remaining one side is located at the operation part of the electrical equipment. It has a removable side formed by a removable panel located at the door and the cable connection part, and also has packing on the engaging part of the door and panel on the removable side, and the panel has both ends at the engaging part. To provide an outer box structure for electrical equipment characterized by providing a drainage groove with a higher height in the center.

That is, the outer box structure of the electrical device of the present invention has the following configuration.

The base is fixed to an opening such as a manhole or handhole with an anchor bolt or the like. An internal frame that supports electrical equipment such as a switch is fixed to the base with bolts or the like. A main body is arranged so as to surround electrical equipment such as a switch supported by the internal frame, and this main body is also fixed to the base.
One side of the main body can be attached to and removed from the main body. One detachable side includes, for example, a door located from the mechanical part of the switch to the movable electrode, and a panel located at the connection part that connects the switch and the cable. The door and the panel are engaged by an engagement portion provided with packing, and a drainage groove is formed in the engagement portion of the panel. This door and panel are fixed to the main body with screws, bolts, etc.
Further, it is preferable that the door can be opened and closed with a hinge relative to the main body.

[Effect]

When opening/closing the switch manually, remove the fixing means such as screws from the door. In this state, the door can be opened and closed by the hinge. When the door is opened, the mechanical part of the switch is exposed, so an operating handle can be attached to the handle attachment part. The operating handle opens and closes the switch, and when the opening/closing operation is completed, the operating handle is removed. After this, close the door and fix it to the main body with screws or the like. During opening and closing operations, the door may be removed from the main body by disengaging the hinge.

When performing cable work, remove the fixing means such as panel screws and remove the panel from the main body. Once the cable work is complete, secure the panel to the main body again.
When doing cable work, you can remove the door mentioned above along with the panel. Packing is provided at the joint between the door and panel to prevent moisture from entering from the outside, and a drainage groove machined into the engaging part of the panel allows moisture that collects in the engaging part to be transmitted to the groove and removed. do.

When replacing the outer box, remove the door and panel using the method described above and unfasten the main body and base. After this,
The outer box can be removed by sliding the main body in the direction opposite to the one side with the door and panel.
Installation of a new outer box can be accomplished by reversing the removal procedure.

〔Example〕

Hereinafter, the outer box structure of the electrical equipment of the present invention will be explained in detail.

FIG. 1 shows an embodiment of the present invention, in which a multi-circuit switch is housed in a main body 1 forming an outer box. The multi-circuit switch may be replaced with a π-type connection switch, or may be replaced with a distribution tower or the like. The multi-circuit switch has a plurality of movable electrodes 2, and a mechanism section (not shown) for moving the movable electrodes 2 up and down is located above the movable electrodes 2. A cable connection part 3 is provided at the bottom of the multi-circuit switch, and connects the multi-circuit switch to an underground power distribution cable. The main body 1 has a door 4 and a panel 5 on the front, and screws 1
It is fixed to the main body 1 by 2 and 15. The multi-circuit switch is supported by an internal frame 8, which is fixed to a base 9. The base 9 is fixed to an opening (not shown) such as a manhole or handhole using an anchor bolt or the like. As is clear from FIG. 1, the door 4 is located at the multi-circuit switch (the movable electrode 2 and the mechanical part not shown), and the panel 5 is located at the cable connection section 3.

FIG. 2a shows the relationship between the main body 1 and the base 9. The main body 1 is open at the bottom, and has a structure in which the door 4 and panel 5 described above can be attached and detached from the front. The attachment/detachment structure of the door 4 and panel 5 will be described in detail later.
The door 4 is engaged with the main body 1 by a hinge (not shown), and is fixed to the screw receiving part 13 of the main body 1 by passing the screw 12 through the screw hole 6. It is fixed to the screw receiving portion 16 of the main body 1 by passing a screw 15 through the hole 7. The panel 5 has a drainage groove 17 at the top, which will be explained in detail later. On the other hand, the base 9 has a fixing part 18 with a screw hole 20 for fixing the main body 1, and is fixed to the screw hole 19 of the main body 1 by a method described later.

FIG. 2b shows a modification of the main body 1, the door 4, and the panel 5, in which the main body 1, the door 4, and the panel 5 are integrated with packing in between, as shown by 4A and 5A. Further, the screw receiving portions 13 and 16 are provided with screw fixing portions having a structure described later in FIGS. 4c and 4d.

FIG. 3 shows a method of fixing the main body 1 and the base 9.
A fixing part 18 is welded to the base 9, and a packing 21 is adhered to the fixing part 18 in advance. The main body 1 is placed on the base 9, a bolt 22 is passed through the screw hole 19, and the packing 21 is compressed to fix the main body 1 to the fixing part 18. The bolt 22 has a normal + or - screw head, but after pushing it in, a tamper-proof blind screw 23 is inserted.
is screwed into the screw hole 19. The blind screw 23 has a dedicated engagement groove at its top, and cannot be operated with a + or - screwdriver, but can be operated with a dedicated screwdriver that matches the dedicated engagement groove. In addition, if there is no tampering involved, a normal thumbscrew will suffice. Further, if necessary, packing 24 may be applied to all contact surfaces between the main body 1 and the base 9.

FIG. 4a shows an example of a hinge between the main body 1 and the door 4.
That is, the end portion 1a of the main body 1 is formed into a hook shape, and the upper end portion 4a of the door 4 is also formed into a hook shape. These hook-shaped parts 1a and 4a are engaged with each other, and a packing 25 is attached to the hook-shaped part 1a.
has been affixed in advance.

FIG. 4b shows a cross section of the door 4 fixed to the screw receiving part 13, in which the packing 26, which has been adhered to the screw receiving part 13 in advance, is compressed. 12 is a screw of the same type as the bolt 22 described above, and 28 is a blind screw of the same type as the blind screw 23 described above. As in the previous example, these may be replaced by thumbscrews. If the door 4 is fixed to the screw receiver 13 here,
The packing 25 of the hinge is in a dimensional relationship that is compressed in the vertical direction.

FIGS. 4c and 4d show a screw fastening structure applied to the screw receiving parts 13 and 16. FIG. The door 4 has an opening/closing lid 42 that rotates around a center 45, and is fixed to the screw receiving part 13 by tightening a packing 26 with a bolt 43. The bolt 43 has a horizontal hole 44A into which the pillar key 41 is inserted and a vertical hole 44B. When performing key operations, place the opening/closing lid 42 in the position indicated by the dashed line.
Insert Piraki 41. At this time, the tip 41A
is horizontal. Tip 41A is vertical hole 44B
When it hits a wall, it bends vertically. This allows the bolt 43 to be tightened and removed. Therefore, the work cannot be performed without the pillar key 41.

FIGS. 5a and 5b show the engaging portions of the door 4 and the panel 5, in which the thin cross-sectional portions of each are in surface contact. The panel 5 has the above-mentioned drainage groove 17 on the top, and a packing 29 is pasted on the thin section. The depth of this drainage groove 17 increases from the center toward both sides.

The operation of the present invention will be explained below.

A frame 8 fixed to a base 9 supports the multi-circuit switch. The main body 1 (excluding the door 4 and panel 5) is fixed to the base 9. At this time, with the body 1 compressing the packing 21, the bolt 2
2 is fixed to the fixed part 18. Blind screws 23 are provided as necessary. Next, the panel 5 is fixed to the screw receiving part 16 of the main body 1 with screws 15. The structure of the screw 15 and the screw receiving part 16 is the same as that shown in FIG. 4b, but it may be replaced by a normal thumbscrew. After this, the hook-shaped part 1 of the main body 1
a to engage the hook-shaped portion 4a of the door 4. This can be easily done by sliding the door 4 perpendicular to the plane of the paper in Figure 4a. Next, the door 4 is fixed to the main body 1 with screws 12. By the above operations, the outer box can be assembled on the outside of the multi-circuit switch.

This state is shown in FIG. 6a. Here, 30 is an electrical device such as a multi-circuit switch. Note that the base 9 is omitted. Next, as shown in FIG. 6b, the door 4 and panel 5 are removed in the reverse order of the steps described above, and the main body 1 is removed from the base 9 (not shown). It can be slid to the opposite side of 5. In this way, the main body 1 can be replaced easily and safely. Needless to say, the operation handle can be attached to the mechanism section by opening and closing the door 4, and the cable connection section 3 can be easily constructed by removing the panel 5.

As shown in FIGS. 7a and 7b, if the side surface 31 of the main body 1 is made removable, the main body 1 can be slid in the direction shown in b. In this way, the sliding direction is not particularly limited.

〔Effect of the invention〕

As explained above, according to the outer box structure of the electrical equipment of the present invention, the main body is formed from four sides integrated from three sides and the back, and the remaining one side has a door and a cable connection part located at the operation part of the electrical equipment. It has a removable side formed by a removable panel located at A drainage groove with a raised height allows the outer box to be attached and detached with a small amount of external force.
Work such as disassembling and assembling the outer box that occurs when attaching and detaching can be easily performed. In addition, not only can the operating part and the joint be opened and closed separately depending on the work using the door and panel, but the packing formed on the engaging part of the door and panel provides watertightness, and the Moisture or the like that accumulates in the engaging portion can be removed by the drainage groove.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing one embodiment of the present invention. FIG. 2a is an explanatory diagram showing the outer box disassembled. Second
FIG. b is an explanatory diagram showing another outer box. Figure 3 is a sectional view showing the fixing part of the main body and base forming the outer box;
Figures a and b are cross-sectional views showing the outer box door and the fixing part of the main body. FIGS. 4c and 4d are sectional views showing other fixing parts. FIGS. 5a and 5b are explanatory diagrams showing the relationship between the door and the panel of the outer case, and FIGS. 6a and 6b and FIGS. 7a and 7b are explanatory diagrams showing how to replace the outer case. Explanation of symbols, 1...Outer box, 2...Movable electrode, 3
... Cable connection part, 4 ... Door, 5 ... Panel,
6, 7, 19, 20... Screw hole, 8... Frame, 9... Base, 12, 15... Screw, 13,
16...Screw receiver, 17...Drain groove, 18...
Fixing part, 21, 24, 25, 26, 29... Packing, 22... Bolt, 23, 28... Blind screw.

Claims (1)

[Claims] 1. An outer box structure for storing and protecting electrical equipment such as a switch, comprising: an outer box having a fixing part that is detachable from a base that supports the electrical equipment, the outer box comprising: A main body consisting of four integrated surfaces covering both sides, three back sides, and an upper side of the electrical equipment, and a fixing part located on the remaining one side of the electrical equipment and detachable from the main body. a removable side surface fixed to the main body through a removable door; The door and the panel have an engaging part that is watertightly engaged with each other through packing, and the panel has a continuous part in the engaging part that has a height at least higher at the center than at both ends. The electrical equipment has a structure in which the outer box is attached and detached by removing the attachment/detachment side surface during movement, and moving the main body parallel to the attachment/detachment side surface in a rearward direction. outer box structure. 2. An outer box structure for electrical equipment, characterized in that the door and panel are locked with a special lock that prohibits opening.