JP3282071B2 - Noise shielding rack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electronic equipment storage rack for shielding electromagnetic noise, particularly external low-frequency noise.

[0002]

2. Description of the Related Art Conventional electronic equipment storage racks are used for electromagnetic noise generated from peripheral electronic equipment and the like and transmitted underground.
In particular, in order to prevent the low frequency noise from adversely affecting the electronic devices inside the rack, an insulating member is interposed between the base of the rack and the ground (floor surface) to float the entire rack from the ground (floor surface). Was common.

FIG. 7 is a perspective view showing one example.
In the figure, a rack 1 ′ has a vertical plate 30 at four corners assembled by fitting a ceiling plate 31 and a rack base 32, a side plate 33 and a back plate 34 are attached to the rack 1 ′, and four corners at the bottom of the rack base 32. Of the rack 1 'is floated from the ground (floor surface). The surface of the level foot 35 in contact with the ground (floor surface) is made of polycarbonate or another insulating material, and has a structure in which low-frequency noise is not transmitted from the ground to the rack 1 'via the level foot 35. Electronic equipment D
Is the vertical panel 3 on the front of the rack 1 '.
It is fixed by being screwed to zero. Since the entire rack 1 'needs to be grounded so as to conform to laws and regulations for safety, the rack base 32
Is connected to an earth line E.

[0004]

However, in the electronic equipment storage rack having the above-described structure, the electromagnetic wave noise generated from peripheral electronic equipment and the like and transmitted through the ground, particularly the rack 1 'due to low frequency noise. In order to prevent any adverse effects on the internal electronic device D, the rack 1 'is entirely insulated from the ground (floor surface) by the level feet 25 having insulating properties, but the rack 1' Since the ground line E is connected to the rack 1 ', low-frequency noise transmitted through the ground line E is connected to the rack 1'.
There is a problem that the internal electronic device D is adversely affected.

In order to solve the above-mentioned problems, the present invention provides an electronic equipment storage rack grounded to meet the requirements of laws and regulations, wherein the low-frequency noise is transmitted directly from underground or via an earth line. Accordingly, it is an object of the present invention to provide a noise shielding rack having a structure capable of preventing adverse effects on electronic devices inside the rack.

[0006]

In order to solve the above-mentioned problems, the present invention relates to an electronic equipment storage rack having a dual structure of an inner body part and an outer body part, wherein the inner body part is directly connected to the electronic equipment. The outer body is grounded, an insulating member is interposed between the inner body and the outer body, and the insulating member is made of polycarbonate.
Plate, and approximately two in the center of the polycarbonate plate
Screw holes are drilled, and an annular convex portion is formed around the screw holes.
Is formed, and the convex portion fits into the positioning hole of the inner body portion.
This constitutes a noise shielding rack .

In the noise shielding rack having the above configuration,
Although low-frequency noise generated from surrounding electronic devices and transmitted through the ground and the earth line is transmitted to the outer body, it is not covered by the insulating member interposed between the inner body and the outer body. Since the electronic device is not transmitted to the internal part, the electronic device directly housed in the internal body has an effect that the adverse effect is not exerted. Also, screw holes are used when screwing the inner body part to the outer body part.
It is necessary, and the ring-shaped convex part
When attaching to the body part,
To temporarily fix the inner body and the polycarbonate plate
It is for

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings. Here, FIG. 1 is a perspective view showing an entire configuration of an embodiment of a noise shielding rack according to the present invention, FIG. 2 is a cross-sectional view of a portion surrounded by dotted lines A and B in FIG. 1, and FIG. FIG. In addition, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.

1. Overall Configuration As shown in FIG. 1, the noise shielding rack 1 has a double structure of an inner body 2 and an outer body 3, and the inner body 2 directly stores the electronic device D, and the outer body 3 has An earth line E is provided, and an insulating member 4 is interposed between the inner body portion 2 and the outer body portion 3.

[0010] In such a noise shielding rack 1, an underground or an earth line E generated from peripheral electronic devices or the like is generated.
The low-frequency noise transmitted to the outer body portion 3 is transmitted to the outer body portion 3, but the insulating member 4 interposed between the inner body portion 2 and the outer body portion 3.
Does not reach the inner body 2, so that the electronic device D directly housed in the inner body 2 is not adversely affected. In addition, according to laws and regulations for the purpose of safety, etc., it is sufficient that the earth line E is provided as a whole, and thus the noise shielding rack 1 conforms to the standard.

2. Configuration of Each Part (1) Inner Body 2 The inner body 2 is a frame 20 in the present embodiment,
This is a part for directly storing the electronic device D. And usually,
The electronic device D is supported by screwing a front panel of the electronic device D into a screw hole 20a formed in a front side surface of the frame 20 (see FIG. 2). As another embodiment, as shown in FIG. 5, the storage shelf 21 may be screwed into a screw hole 20 a of the frame 20 as the inner body 2, and the electronic device D may be placed on the storage shelf 21. As still another embodiment, a screw hole 2 on the front side surface of the frame 20 is provided.
A structure in which a slide rail is fixed to Oa or 20b on the inner side surface of the frame 20 and a cabinet is engaged with the slide rail (see FIG. 6).

As described above, the inner body 2 is not limited to the frame 20 of the present embodiment, and various other modes are possible. In addition, for example, the inner body part 2 as shown in FIG.
In order to prevent the low frequency noise transmitted to the vertical column 30 from transmitting to the frame 20 by the screw at the joint portion between the inner body 2 and the outer body 3, the washer 22 is also provided to keep the inner body 2 in a noiseless state. Of course, it is necessary to be made of polycarbonate or other insulating materials.

(2) Outer body part 3 In this embodiment, the outer body part 3 comprises a vertical column 30, a ceiling plate 31, a rack base 32, side plates 33, and a back plate 34. These are objects to which the earth line E is connected as a part of the noise shielding rack 1. Therefore, these shapes are not limited to those shown, and various shapes are possible. In addition, the material is usually made of metal, but may be made of wood, resin or the like in consideration of the external appearance in some cases. Reference numeral 36 denotes an escutcheon, which shields a front joint portion to improve the appearance.

(3) Earth line E Laws and regulations stipulate that electrical appliances and the like having a certain standard or higher must be grounded in order to keep them at the same potential as the ground. An earth line E is connected to a part of the body part 3, here a rack base 32.

(4) Insulating Member 4 In the present embodiment, as an example of the insulating member 4, a polycarbonate plate piece 40, a polycarbonate plate angle 41
Are listed. These intervene between the inner body part 2 and the outer body part 3 and serve to shield low-frequency noise. These specific shapes are as shown in FIG. That is, in the polycarbonate plate piece 40,
As shown in FIG. 4A, two screw holes 30a are provided substantially at the center.
Are formed, and annular convex portions 40b are formed around the screw holes 40a. Here, two screw holes 4
0a is required when the frame 20 is screwed to the vertical column 30. The annular convex portion 40b fits into the positioning hole 20c of the frame 20 when the frame 20 is mounted on the vertical column 30. This is for temporarily fixing the frame 20 and the polycarbonate plate piece 40 by joining (see FIGS. 2 and 3). On the other hand, as shown in FIG. 4B, the polycarbonate plate angle 41 is formed by integrally forming a back plate 41a having exactly the same shape as the polycarbonate plate piece 40 and a bottom plate 41b orthogonal to the back plate 41a.

The polycarbonate plate piece 4 having such a shape
0, the polycarbonate plate angle 41 is used as follows. That is, as shown in FIG. 3A, the polycarbonate plate piece 40 is interposed on the vertical contact surface between the frame 20 and the vertical column 30. As shown in FIG. 3B, in the polycarbonate plate angle 41, the bottom plate 41b is interposed on the horizontal contact surface between the frame 20 and the rack base 32, and the back plate 41a is connected to the side surface of the frame 20 and the vertical column. It is interposed on a vertical contact surface with the side surface of the body 30.

The material of the insulating member 3 in the present invention is not limited to polycarbonate as in the present embodiment, but may be another material having an insulating property. Similarly, the shape of the insulating member 3 in the present invention is not limited to the illustrated shape described in the present embodiment.
Any material can be used as long as it can be fixed to the outer body portion 3 and can electrically insulate them.

3. Others In the noise shielding rack 1 of the present embodiment, the ground line E is connected to the rack base 32, so that there is no legal problem. However, when the inner body 2 is grounded for other safety reasons, In a place without noise,
That is, it is grounded in an electrically clean place. In this way, the stored electronic device D is not adversely affected by low-frequency noise.

[0019]

As described above, in the noise shielding rack according to the present invention, although low-frequency noise generated from peripheral electronic devices and transmitted through the ground and the earth line is transmitted to the outer body, Because it is not transmitted to the inner body by the insulating member interposed between the inner body and the outer body,
Electronic devices housed directly in the body are not adversely affected. Therefore, the electronic equipment storage rack is grounded so as to conform to the requirements of laws and regulations, and it is possible to prevent the low frequency noise transmitted through the ground or the ground line from affecting the electronic equipment inside the rack. A noise shielding rack having a structure can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an overall configuration of an embodiment of a noise shielding rack according to the present invention.

FIG. 2 is a cross-sectional view taken along a dotted line in FIG. 1;

3A is a vertical sectional view of a portion surrounded by a dotted line A in FIG. 1, and FIG. 3B is a vertical sectional view of a portion B surrounded by a dotted line in FIG.

4A and 4B are perspective views illustrating an example of an insulating member, wherein FIG. 4A is a polycarbonate plate piece, and FIG. 4B is a polycarbonate plate angle.

FIG. 5 is a perspective view illustrating another embodiment of the noise shielding rack according to the present invention, in which a frame and a storage shelf are provided as an inner body.

FIG. 6 is a perspective view showing another embodiment of the noise shielding rack according to the present invention, which is an example in which a slide cabinet is provided on a frame as an inner body.

FIG. 7 is a perspective view illustrating a conventional electronic device storage rack.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Noise shielding rack 1 '... Rack 2 ... Inner body part 3 ... Outer body part 4 ... Insulating member 20 ... Frame 20a ... Screw hole (front side) 20b ... Screw hole (inner side) 20c ... Positioning hole 21 ... Storage shelf 22 ... washer 30 ... vertical column 31 ... ceiling plate 32 ... rack base 33 ... side plate 34 ... rear plate 35 ... level foot 36 ... escutcheon 40 ... polycarbonate plate piece 40a ... screw hole 40b ... convex part 41 ... polycarbonate plate angle 41a ... Back plate 41b ... Bottom plate D ... Electronic equipment E ... Earth line

Claims (1)

(57) [Claims] 1. An electronic device storage rack having a double structure of an inner body portion and an outer body portion, wherein the inner body portion directly stores the electronic device, the outer body portion is grounded, and the inner body portion and the outer body An insulating member is interposed between the first and second portions, and the insulating member is formed of a polycarbonate plate, and two screw holes are formed at substantially the center of the polycarbonate plate.
An annular convex portion is formed around the screw hole, and the convex portion is fitted into a positioning hole of the inner body portion.
The noise shielding rack which is a feature.