JPH0993728A - Switchboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exchange a filter from the outside of a housing by fitting a cap which covers the opening section of the housing to the housing so that the cap can be opened outward and forming intake ports through the cap, and then, fitting the filter to the internal surface of the cap. SOLUTION: An opening section 1a is formed in a housing 1 and a supporting frame 12 is fixed to the opening 1a with screws from the outside of the housing 1. On the other hand, a cap 13 which is fitted to the housing 1 from the outside so as to cover the frame 12 is provided. The cap is formed by bending four sides of a metallic plate and has a plurality of intake ports 14 at the central part. A filter 22 is detachably attached to the internal surface of the cap 13 so as to cover the ports 14. Two pairs of bearing members 17 which support shafts 18 inserted into the holes of hinges 15 are connected to the lower part of the internal surface of the cap 13 and nuts 19 are engaged with the front ends of the shafts 18 passed through the members 17 and inserted into the holes of the hinges 15. Pins are passed through the other end sections of the shafts 18 opposite to the front ends engaged with the nuts 19 so as to prevent the shafts 18 from coming off the members 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchboard, and has an improved intake hole for ventilation.

[0002]

2. Description of the Related Art An electric power distribution board is provided with an intake hole and an exhaust hole for the purpose of preventing an internal temperature rise. FIG. 6 shows the configuration of a conventional switchboard. In the figure, 1 is a housing, 2 is a door, 3 is a fixed platen, 4 is an intake hole, 5 is an exhaust hole, and 6 is a charging section.

The outside air enters the inside of the housing 1 through the intake hole 4, moves upward when the temperature rises, and is discharged from the exhaust hole 5 in the upper part.

The structure of the intake hole 4 is shown in FIG. That is, a plurality of holes 10 are formed in the fixed platen 3, and the filter 7 arranged inside the fixed platen 3 is supported by the hole 10 through the holding frame 8. The holding frame 8 is fixed to the fixed platen 3 by a detachable latch 9.

When the filter 7 is to be replaced, the door 2 is opened and an operator enters the housing 1 to remove the latch 9 and remove the holding frame 8 to remove the old filter 7 and replace the new filter 7. Install.

[0006]

However, since the worker has to enter the inside of the housing, there is a risk of electric shock by touching the charging part. Further, depending on the condition of the equipment, wiring, etc., the space for installing and removing the filter is insufficient, which makes the work difficult. On the other hand, if sufficient space is taken, the installation location of the device is limited.

Therefore, an object of the present invention is to provide a switchboard which solves the above problems.

[0008]

[Means for Solving the Problems] The structure of the present invention for achieving such an object forms an opening in a housing, and closes the opening so that the filter can be replaced from outside the housing. It is characterized in that the lid is provided so as to be openable and closable toward the outside of the housing, the intake hole is formed in the lid, and the filter is detachably provided at a portion inside the lid and corresponding to the intake hole.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. Since this embodiment is an improvement of a part of the conventional switchboard, only different parts will be described.

The structure of the switchboard according to the present invention is shown in FIGS.
Shown in As shown in FIG. 1, an opening 1a is formed in the housing 1, and a support frame 12 is attached to the opening 1a from the outside of the housing 1 via a screw 11. The support frame 12 is the housing 1
It is formed of a rectangular flat plate 12a to be attached to a frame and a frame body 12b in which materials having an L-shaped cross section are connected in a quadrangle. A pair of hinges 15 having the shape shown in FIG. 1B are fixed to the lower surface of the frame body 12b. Also, a pair of hinges 15
A pair of stoppers 16 having an L-shaped cross section are provided on both sides of the flat plate 12.
It is fixedly attached to a.

On the other hand, a lid 13 for mounting the support frame 12 from the outside of the housing 1 is provided. Lid 1
As shown in FIG. 2, 3 is formed by bending four sides of a metal plate, and a plurality of intake holes 14 are formed near the center.
A filter 22 is detachably attached to the inside of the lid 13 where the air intake hole 14 is formed. And
Bearing member 1 for supporting a shaft for insertion into the hole of the hinge 15
A nut 19 is screwed onto the tip of a shaft 18 which is connected to the inner lower portion of the two-pair lid 13 and which penetrates the bearing member 17 and is inserted into the hole of the hinge 15. The non-nut side of the shaft 18 is prevented from coming off by inserting a pin (not shown). In addition, a pair of thumbscrews 20 for hooking the upper portion of the lid 13 to the frame 12b and stopping it are provided so as to penetrate through the upper portion of the lid 13, and the tip of the thumbscrew 20 is provided with the frame 12
An engagement member 21 that engages with b is fixed.

Next, the operation of such a switchboard will be described. If the lid 13 is closed and the knob screw 20 is turned to engage the engagement member 21 with the frame body 12b, the lid 13 will not open. In this state, the outside air passes through the intake hole 14 and the filter 22 and enters the housing 1, and dust and the like are removed by the filter 22.

To replace the filter 22, see FIG.
As shown by the phantom line in FIG. 3, after rotating the knob screw 20, the engaging member 21 that was engaged with the frame body 12b at the position of the phantom line is rotated to the position shown by the solid line. The lid 13 is opened toward the outside of the housing 1. Then
The operator does not enter the housing 1 and the filter 2
2 can be exchanged. Since the outer edge of the lid 13 contacts the stopper 16 as shown in FIG. 4 when the lid 13 is opened, the lid 13 stops in the horizontal state and the filter 22 can be easily replaced.

In this embodiment, the hinge is arranged on the lower part of the lid, but it may be arranged on the upper part or on the side.

[0015]

As can be seen from the above description, according to the switchboard of the present invention, the filter is provided inside the outer lid provided at the opening, so that the filter can be replaced from the outside of the housing. Since there is no need to go inside the housing, there is no risk of electric shock by touching the charging part. In addition, a work space for replacing the filter is not required in the housing, and the space can be effectively used for mounting a device.

[Brief description of drawings]

FIG. 1 relates to an opening of a switchboard according to the present invention, (a) is a front view, and (b) is a view taken along the line AA of (a).

2A and 2B relate to a lid of a switchboard according to the present invention, FIG. 2A is a front view, and FIG. 2B is a view taken along the line BB of FIG.

FIG. 3 is an operation explanatory view of the switchboard according to the present invention.

FIG. 4 is an enlarged cross-sectional view of the vicinity of the hinge in the switchboard of the present invention.

5A and 5B relate to the vicinity of a thumbscrew of a switchboard according to the present invention, FIG. 5A is a front view, and FIG.

FIG. 6 is a configuration diagram of a conventional switchboard.

FIG. 7 is a perspective view of a main part of a conventional switchboard.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing 1a ... Opening 13 ... Lid 14 ... Intake hole 15 ... Hinge 18 ... Shaft 22 ... Filter

Claims (1)

[Claims] 1. An opening is formed in a housing accommodating an electric device, a lid for closing the opening is provided so as to be openable and closable toward the outside of the housing, an intake hole is formed in the lid, and an inner surface of the lid is formed. Is a switchboard with a filter attached.