JPH0346544Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a cabinet in which electronic equipment is housed, and particularly relates to a cabinet with increased rigidity and improved earthquake resistance.

<Prior Art> FIG. 4 is a configuration diagram showing a conventional electronic device housing device, in which A is a plan view, B is a front view, and C is a side view taken along the C-C direction. In the figure, the cabinet 1 has a thin cross-sectional structure and is composed of a side plate 12, a back plate 14, a ceiling plate 16, and a ceiling plate 18 arranged vertically or horizontally, and is provided with a front door if necessary. The thickness of such a plate material is, for example, about 3 mm, and a steel plate is used. The vertical structure 2 is provided on the side surface of the cabinet 1, and is located in the vertical direction from the bottom plate to the ceiling plate, forming a left and right pair. The rack 3 accommodates a printed circuit board and a power supply therein, and is provided with mounting flanges 32 having an L-shaped cross section on the left and right sides. Mounting collar 32
A mounting hole 34 is provided in the mounting hole 34, and it can be mounted to the vertical structure 2 using bolts or the like. A cable accommodating plate 36 is provided on the lower front side, and cables for connection with external devices are arranged and arranged.

Such a cabinet 1 has, for example, dimensions of 2000 x 650 x 800 [mm ³ ] in [length x width x height] and a weight of about 160 kg with side plates. The dimensions of Rack 3 are approximately 200 x 500 x 350 [mm], and the weight of the unit is 10~
It has become 20Kg. and 10 depending on what is being controlled
It is standard practice for approximately 3 racks 3 to be accommodated in a single cabinet 1.

<Problems to be Solved by the Invention> However, when a large number of racks are accommodated, the weight of the racks lowers the natural frequency of the cabinet, resulting in a decrease in earthquake resistance. The rack has a frame structure, and there are no members equivalent to beams that run front to back and left and right to increase the rigidity of the cabinet. Therefore, for example, there is a vibration mode around the shear center of the cross section that causes torsion, sideways fall, and buckling.

The present invention has solved these problems, and aims to provide an electronic equipment housing device in which a rack is incorporated to increase the rigidity of the cabinet, thereby increasing earthquake resistance.

<Means for Solving the Problems> The present invention that achieves the above object includes a cabinet formed with a thin closed cross-section structure, a vertical structure provided vertically inside the side surface of the cabinet, and a vertical structure provided in the vertical structure. An electronic device housing device having a mounting collar and a rack to be housed in the cabinet has the following configuration.

That is, the present invention is characterized by the provision of a reinforcing plate having mounting collars located on the left and right side surfaces of the rack and a cross beam part integrally formed with the mounting collars along the bottom surface of the rack.

<Function> Each component of the present invention has the following function. The reinforcing plate of the rack is provided with an attachment collar used for attachment to the vertical structure and a horizontal beam that serves as a beam to be attached to the vertical structure. This increases the rigidity of the cabinet with rack mounting and compensates for the reduction in natural frequency.

<Example> The present invention will be explained below using the drawings.

FIG. 1 is a configuration diagram showing an embodiment of the present invention.
A is a plan sectional view, B is a front sectional view, and C is a side sectional view, which are respectively cut in the AA, BB, and CC directions. In addition, in FIG. 1, the fourth
Components that have the same functions as those in the figures are given the same reference numerals and their explanations will be omitted.

In the figure, the reinforcing plate 4 is fixed to the side surface of the rack instead of the mounting collar 32, and is attached to the vertical structure 2 using bolts or screws. Cross beam part 42
is located on the underside of the rack bottom plate, and the reinforcing plate 4
It forms part of the structure and acts as a girder that connects the vertical structure 2. The side diaphragm 5 is attached to the side of the rack 3, and is made of FRP (fiber reinforced plastic) or the like in addition to a metal plate having a shielding effect. The backboard 6 is provided on the back side of the rack 3, and is provided with wiring that connects the printed circuit boards housed inside.

The operation of the device configured in this manner will be described next. FIG. 2 is a configuration diagram before assembly, and FIG. 3 is a configuration diagram after assembly. The rack 3 has a reinforcing plate 4 attached thereto to increase its rigidity. Although the weight of the cabinet 1 increases by incorporating the rack 3,
In particular, the cross beam portion 42 acts effectively, and the rigidity of the cabinet 1 is also increased. As a result, the torsional stiffness increases and the natural frequency of the sideways buckling mode does not decrease. That is, the entire cabinet 1 has a three-dimensional girder structure due to the cross beam portions 42, and almost no distortion occurs in the cross section.

Since Rack 3 has increased rigidity, it has the following characteristics.

(a) Retention of cross-sectional shape: Even if an eccentric load is present, the cross-sectional shape of the cabinet is prevented from changing.

(b) Distribution of stress...The force necessary to prevent cross-sectional deformation acts as a shearing force on the rack 3, and is transmitted to the cabinet 1 via the reinforcing plate 4 as a shearing force.

(c) Increase in torsional rigidity...The vertical structure 2 is increased by the horizontal beam part 42.
Since it has the effect of distributing the load acting on it, it reduces warping stress and increases rigidity against torsion and cross-sectional deformation.

<Effects of the invention> As explained above, according to the invention, easy 3
A horizontal beam portion 42 is provided in the vertical structure 2 of the cabinet 1.
When installed in the cabinet, it acts as a beam and increases the rigidity of the cabinet, which has the practical effect of compensating for the increase in load, preventing a drop in the natural frequency, and maintaining earthquake resistance.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing one embodiment of the present invention;
3 and 3 are explanatory diagrams of the assembled state of the device shown in FIG. 1, and FIG. 4 is a configuration diagram of the conventional device. 1... Cabinet, 2... Vertical structure, 3... Rack, 4... Reinforcement plate, 42... Horizontal beam portion.

Claims (1)

[Claims for Utility Model Registration] A cabinet formed with a closed cross-section thin wall structure,
In an electronic equipment storage device comprising a vertical structure provided vertically inside a side surface of the cabinet, and a rack that is housed in the cabinet and has a mounting collar attached to the vertical structure, the rack is located on the left and right side surfaces of the rack. What is claimed is: 1. An electronic device housing device comprising: a mounting collar; and a reinforcing plate having a horizontal beam integrally formed with the mounting collar along the bottom surface of the rack.