JP2019102760A - Rack for housing - Google Patents

Abstract

To achieve a rack for housing, in which an intensity of a shelf board is increased while suppressing increase of weight.SOLUTION: A rack for housing, comprises: a casing for housing equipment; and a shelf board 30 for mounting the equipment attached to the housing. The shelf board 30 comprises: a board material 31 of which a back surface becomes a box structure; a lattice-like beam 32 provided into an inner part of the box structure; and a slit 34 projected from the back surface of the board material 31 to between the beam 32 by a drawing processing. Since the drawing processing is performed to all of the slit 34 formed onto the shelf board 30, and a peripheral edge of the slit 34 is stood, a cross sectional area of the shelf board 30 is increased, and earthquake proof can be improved. Since the back surface of the shelf board 30 is formed as a box structure providing the lattice-like beam 32 in the inner part, sufficiently earthquake proof can be obtained while suppressing increase of weight of the shelf board 30 as possible.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shelf of a storage rack for storing and placing communication devices, network devices, etc., for example, a shelf of storage racks such as a rigid structure installed in a facility with strict seismic standards such as a nuclear power plant etc. It is about

  In recent years, for example, the development of new regulatory standards has strengthened the earthquake resistance standards at nuclear power plants, and there is also a tendency for very strict earthquake resistance performance to be required for storage racks installed in nuclear power plants. In addition to severe seismic performance and demand for mass limitation, there is a need for a storage rack having high seismic performance while suppressing weight increase.

  Here, as a method of improving the earthquake resistance performance of the storage rack, a method of reinforcing the storage rack by generally reinforcing the frame that constitutes the columns and the like and the shelf board for mounting the equipment is generally used. For reinforcement of the frame, for example, as described in Patent Documents 1 to 3 and the like, the method of providing a reinforcement member between the frame corners or between the frames or providing a plurality of bent portions in the vertical frame It is known how to raise Moreover, about reinforcement of a shelf board, methods like following (1) and (2) are known, for example.

(1) As described in Patent Document 4 etc., the shelf board is bent and reinforced to increase the strength. In this method, the strength is improved by increasing the cross-sectional area of the shelf board by bending and reinforcing.
(2) Increase the thickness of the shelf board.
However, with the method of reinforcing shelf boards described in (1) and (2) above, the reinforcement of the storage racks installed in facilities (for example, nuclear power plants etc.) with strict seismic resistance standards has insufficient strength due to the reasons described later. It was difficult to use the reinforcement method sufficiently or.

JP, 2011-155211, A Patent No. 4928279 JP, 2014-203997, A JP, 2017-79995, A

The conventional method for reinforcing a shelf board has the following problems (A) and (B).
(A) In the case where the shelf board is bent and reinforced The bending of the shelf board is generally reinforced by bending the left and right or front and back portions of the shelf board. However, in this method, the strength of the central portion of the shelf plate is weak and is distorted when receiving a large earthquake.
In addition, a plurality of slits (holes) for “heat release” and “band attachment for fixing the device” are generally formed on the shelf board on which the communication device, the network device and the like are placed. However, in the case of such a shelf, since the strength of the shelf is lowered by the slits, reinforcement is insufficient only by bending.

(B) In the case of increasing the thickness of the shelf board In the case of achieving a strength that can withstand large vibrations (for example, 3 G or more in the horizontal direction and 2 G or more in the vertical direction) assumed in the earthquake resistance standard of the nuclear power plant The thickness of the shelf board needs to be considerably increased, and the weight is greatly increased. Therefore, the operation of arranging the shelf board in the storage rack becomes difficult. In addition, since the weight of the entire rack is increased, the required mass limitation of the storage rack may be exceeded.

The present invention is a storage rack comprising a housing for housing equipment and a shelf board for mounting equipment mounted in the housing, the shelf board having a front surface and a back surface, Between the plate material having a box structure on the back surface, a lattice and / or a cross beam provided inside the box and the lattice and / or a cross beam, the drawing is performed by drawing And a slit protruding from the back surface of the plate material.
The slit has, for example, a groove for radiating and / or fixing an apparatus, and a protrusion protruding toward the back surface on the periphery of the groove.

  According to the present invention, the slit provided in the shelf is drawn and the peripheral edge of the slit is erected on the back side, so the cross-sectional area of the shelf is increased and the strength is improved. Furthermore, since grid-like and / or cross-like beams are provided on the back surface of the plate material having a box structure, it is possible to obtain sufficient strength while suppressing the weight of the shelf board.

The perspective view which shows the back surface of the shelf board 30 of Example 1 of this invention The perspective view which shows the surface of the shelf board 30 of FIG. 1 An enlarged sectional view showing the structure of the slit 34 in FIG. 2 The perspective view which shows the external appearance of the storage rack in Example 1 of this invention Schematic perspective view showing the interior structure of FIG. 4 The back surface schematic which shows the shelf board in Example 2 of this invention The back surface schematic which shows the shelf board in Example 3 of this invention

  The mode for carrying out the present invention will be apparent from the following description of the preferred embodiment, when read in conjunction with the attached drawings. However, the drawings are for the purpose of illustration only and do not limit the scope of the present invention.

(Configuration of Example 1)
FIG. 4 is a perspective view showing the appearance of the storage rack in the first embodiment of the present invention. Furthermore, FIG. 5 is a schematic perspective view showing the interior structure of FIG.

  This storage rack is, for example, a 19-inch rack type rigid structure rack, and has a housing 10 for storing equipment. The housing 10 is formed of a lightweight steel such as an aluminum alloy material, and has a rectangular bottom frame 11, a plurality of (for example, four corners) columns 12 erected on the bottom frame 11, and these columns 12. And a sky frame 13 fixed to the upper end of the frame. The bottom frame 11 is provided with a cable introduction port 11 a. In the four columns 12, columns 14 for supporting a plurality of shelves are also provided. The outer side surfaces of the four columns 12 are covered by the front panel 21 for the opening and closing door, the left side panel 22, the right side panel 23, and the back panel 24. Furthermore, the upper surface of the sky frame 13 is covered with a ceiling panel 25.

The front panel 21 is provided with a flat handle 21a for opening and closing, and a plurality of intake ports 21b are also formed. The back panel 24 is also provided with a plurality of air inlets (not shown). The ceiling panel 25 is provided with a plurality of exhaust ports 25 a with a ventilation fan. Although not shown, the housing 10 is provided with reinforcement (for example, a plurality of reinforcement members in the form of a brace or the like is provided between the columns 12) in order to improve the strength.
A plurality of shelf receiving angles having an L-shaped cross section (not shown) are vertically fixed in a plurality of stages between the plurality of shelf supporting columns 14, and the shelf plate 30 is mounted on the pair of shelf receiving angles of each stage. It is fixed by a bolt etc.

  FIG. 1 is a perspective view showing the back surface of the shelf board 30 in the case 10 of FIG. 5 in the first embodiment of the present invention. Furthermore, FIG. 2 is a perspective view showing the surface of the shelf board 30 of FIG.

  The shelf board 30 has a rectangular plate member 31 formed of an iron material or the like. The plate 31 has a front surface and a rear surface, and the rear surface has a box structure. Inside the box structure, a grid-like beam 32 of flat steel is provided. The beam 32 is fixed to the back surface of the plate 31 by a structural adhesive and welding. An outer frame 33 of a flat steel is placed on the periphery of the back surface of the plate member 31, and the outer frame 33 is fixed by a structural adhesive and welding or the like. One or more slits 34 are formed in the area of the plate member 31 surrounded by the grid-like beams 32. The slits 34 are formed in the plate member 31 by drawing processing for heat radiation, for passing a band or the like fixed to the device.

  3 (a) and 3 (b) are enlarged sectional views showing the structure of the slit 34 in FIG. 2, and FIG. 3 (a) is a view showing the slit 34A of the comparative example, and FIG. FIG. 6 is a view showing a slit 34 of the first embodiment.

  The slit 34 </ b> A of the comparative example shown in FIG. 3A has an elongated groove shape formed on the plate member 31. In the shelf board on which the communication device, the network device, etc. are placed, a plurality of slits 34A for “heat radiation” and “for passing a device fixing band” are generally formed. However, in the case of such a shelf, the slit 34A causes the strength of the shelf to be reduced.

  Therefore, in the slit 34 of the first embodiment, as shown in FIG. 3B, the plate 31 is subjected to a drawing process, and the peripheral edge of the elongated groove 34a is protruded to the back side of the plate 31 ) Forming a protruding portion 34b. By such a slit structure, the cross-sectional area of the plate member 31 (that is, the shelf plate 30) is enlarged to improve the strength.

  The plurality of slits 34 are formed in advance in the plate member 31 by drawing at a position not interfering with the beam 32, and then the beam 32 is fixed to the back surface of the plate member 31.

(Operation of Embodiment 1)
The storage racks of FIG. 4 and FIG. 5 are installed, for example, in a facility with strict seismic standards such as a nuclear power plant. Communication equipment, network equipment and the like are placed on a plurality of stages of shelf boards 30 provided in the housing 10 of the storage rack, and the equipment fixing bands (not shown) passing through the plurality of slits 34 are provided for these equipments. Is fixed. Communication devices, network devices and the like mounted on the shelf plate 30 are connected to cables (not shown) drawn from the cable introduction port 11 a of the bottom frame 11. Further, a not-shown waste fan provided in the exhaust port 25a of the ceiling panel 25 is connected to a not-shown cable drawn from the cable introduction port 11a.

  When a large vibration is applied to the storage rack due to the occurrence of an earthquake, the housing itself is a rigid structure and can withstand the large vibration. However, vertical and horizontal stresses are applied to the shelf plates 30 of the plurality of stages due to the vibration of the housing 10 in the vertical and horizontal directions.

  In the shelf board 30 of the first embodiment, all slits formed in the shelf board 30 are subjected to drawing processing, and the peripheral edge of the slit 34 is erected, thereby increasing the cross-sectional area of the shelf board 30 and achieving earthquake resistance. I am improving. Moreover, since the back surface of the shelf plate 30 has a box structure, and the grid-like beams 32 of flat steel are provided inside the box structure, sufficient seismic resistance is achieved while minimizing the weight increase of the shelf plate 30. The structure is obtained. Therefore, even if the above-described upper, lower, left, and right stresses are applied, it is possible to properly prevent the failure, breakage or the like of the communication device or the network device mounted on the shelf plate 30.

(Effect of Example 1)
According to the first embodiment, the drawing process is performed on all the slits 34 formed in the shelf plate 30 and the peripheral edge of the slits 34 is made to stand, so the cross-sectional area of the shelf plate 30 becomes large and earthquake resistance Strength is improved. In other words, the slit itself that has caused the strength reduction can contribute to the reinforcement. Furthermore, since the back surface of the shelf plate 30 has a box structure, and a grid-like beam 32 of flat steel arranged so as not to interfere with each slit 34 is provided inside the box structure, weight of the shelf plate 30 is increased. Sufficient seismic resistance can be obtained while being suppressed as much as possible.

  Therefore, for example, it is possible to realize the shelf board 30 that can withstand large vibration as expected in the earthquake resistance standard of the nuclear power plant. Moreover, unlike the shelf board whose thickness is increased to improve the strength, since it is lightweight, there is no hindrance to the work of attaching the shelf board 30. In addition, since the weight of the entire storage rack can be suppressed, the concern of exceeding the rack mass limitation required by the reinforcement of the shelf board 30 can be reduced.

FIG. 6 is a schematic back side view showing the shelf board in Example 2 of the present invention.
In the shelf board 30A of the second embodiment, as in the first embodiment, the back surface of the plate member 31 constituting the shelf board 30A has a box structure. In the inside of this box structure, unlike the first embodiment, a grid-like beam 32A and a bracing beam 32B of flat steel are mixedly provided. Although not shown, one or more slits 34 are formed in the region of the plate member 31 surrounded by the beams 32A and 32b, as in the first embodiment.

  Even with the shelf board 30A having such a configuration, substantially the same function and effect as the shelf board 30 of the first embodiment can be obtained.

FIG. 7 is a schematic rear view showing the shelf board in the third embodiment of the present invention.
In the shelf board 30B of the third embodiment, as in the first embodiment, the back surface of the plate member 31 constituting the shelf board 30B has a box structure. Unlike the first embodiment, a bracing beam 32B of flat steel is provided inside the box structure. Although not shown, one or more slits 34 are formed in the region of the plate member 31 surrounded by the beams 32B as in the first embodiment.

  Even with the shelf board 30B having such a configuration, substantially the same function and effect as the shelf board 30 of the first embodiment can be obtained.

(Modification)
The present invention is not limited to the above first to third embodiments, and various modes of use and modifications are possible. For example, the following (a) and (b) may be used as this form of use or modification.

(A) Figures 4 and 5 show a large type storage rack consisting mainly of aluminum alloy material and having a total length of about 2 m, but the rack structure may be changed to another shape, structure, metal material, etc. it can. For example, the shelf boards 30, 30A, and 30B of the first to third embodiments can be applied even to a small-sized storage rack that is mainly made of iron material and has a total length of about 1 m or less.
(B) The shapes, structures, metal materials and the like of the shelves 30, 30A and 30B in the first to third embodiments can be variously changed.

DESCRIPTION OF REFERENCE NUMERALS 10 case 11 bottom frame 12 post 13 sky frame 14 shelf support pole 21, 22, 23, 24, 25 panel 30 shelf plate 31 plate member 32, 32A, 32B beam 34 slit 34 a groove 34 b protrusion

Claims (3)

A housing for storing equipment;
A device mounting shelf board mounted in the housing;
Storage rack provided with
The shelf board is
A plate material having a front surface and a rear surface, the rear surface being in a box structure;
Grid and / or bracing beams provided inside the box structure;
Between the grid-like and / or bracing-like beams, slits formed by drawing from the back surface of the plate material,
A storage rack characterized by comprising: The slit is
A groove for heat radiation and / or for fixing the device;
At the periphery of the groove, a protrusion that protrudes to the back surface side,
The storage rack according to claim 1, comprising: The housing is
Bottom frame,
A plurality of columns erected on the bottom frame;
A sky frame fixed to the upper end of the plurality of columns;
A panel covering an outer surface of the plurality of columns and an upper surface of the sky frame;
The storage rack according to claim 2, comprising:

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