JPH10224058A - Shelf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength of a shelf without reducing an accommodation space when the shelf is fixed to racks at opposite sides thereof and an electronic appliance is mounted by insertion into the shelf. SOLUTION: In a shelf 40, transverse beams 41-1, 41-2 and 41-3 are horizontally extended and provided at a middle position with respect to the vertical direction thereof. This shelf 40 is further provided with an upper-side electronic appliance accommodation portion above the transverse beams 41-1, 41-2 and 41-3, and a lower-side electronic appliance accommodation portion beneath the transverse beams 41-1, 41-2 and 41-3. The transverse beams 41-1, 41-2 and 41-3 support the weight of an electronic appliance mounted on the above- mentioned upper-side electronic appliance accommodation portion. Likewise, the transverse beams 41-1, 41-2 and 41-3 are arranged to support the weight of an electronic appliance mounted on the above-mentioned lower-side electronic appliance accommodation portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shelf, and more particularly, to a shelf that forms part of a rack-type communication device. The rack-type communication device has a structure in which left and right sides of a shelf are screwed to a gate-type rack, and electronic devices are inserted into each shelf from the front side and mounted. It is desirable that this rack-type communication device has a short height.

[0002] The height of a shelf is expressed in a predetermined unit. For example, in North America, units of shelf height are represented by U and are referred to as 1U shelves, 2U shelves, 3U shelves, and the like. 1U is 44.45 mm. Mounting holes are arranged on the rack based on 1U.

In order to keep the height of the rack type communication device short,
It is necessary to prevent useless gaps between the vertical directions of the shelves attached to the rack, and for that purpose, the height of all shelves needs to be an integral multiple of a unit. Due to the fact that the mounting holes of the rack are arranged on the basis of 1U, if a shelf that is not an integral multiple such as 1.3 times the unit is included, this shelf and the shelf immediately above this shelf This is because a space corresponding to the size of 0.7 times the height unit is created between them.

[0004] On the other hand, as an electronic device mounted in a shelf, a device that is heavier and has a larger size (height dimension) than ever has come up. An optical dispersion compensating device that stabilizes the wavelength of light when the rack-type communication device is an optical communication device is the first. In order to further stabilize the wavelength of light, it is necessary to wind an optical fiber having a length of about 10 km on a reel, and in this case, the weight of the optical dispersion compensating device becomes, for example, 3 kg or more.

[0005] As described above, the shelf is required to have a structure that can cope with a heavier electronic device.

[0006]

FIG. 11 shows a conventional shelf 10.
FIG. 3A schematically shows a part of the shelf 10. The shelf 10 is a 2U shelf, and has a structure in which a 1U box-shaped upper shelf 11 and a 1U box-shaped lower shelf 12 are connected to each other by a mounting bracket 13 on the side surface and integrated. Upper shelf 11 and lower shelf 1
2, there is provided an interference prevention gap 14 for accommodating screw heads and the like so that screw heads and the like protruding from the bottom plate of the upper shelf 11 and the top plate of the lower shelf 12 do not hit. . The dimension g of the gap 14 is about 5 mm.

[0007] Upper shelf 11 and lower shelf 12
Have optical dispersion compensation device accommodation spaces 15 and 16, respectively. The height dimension of the optical dispersion compensation device housing spaces 15 and 16 is a. As shown in FIG. 12, the shelf 10 has a mounting bracket 13 screwed to a rack 20 and mounted on the left and right sides.

A light dispersion compensating device 21 is inserted and mounted in the light dispersion compensating device receiving spaces 15 and 16 of the upper shelf 11 and the lower shelf 12.

[0009]

In accordance with the structure of the above-mentioned shelf 10, if an attempt is made to accommodate a light dispersion compensating device which is heavier than before, as shown in FIG. As shown by reference numeral 11a, the strength is enhanced by using the bottom plate 30a whose thickness increases from t0 to t1, and the lower shelf similarly increases in thickness from t0 to t1 as shown by reference numeral 12a. It is necessary to enhance the strength by using the bottom plate 30a.

When the bottom plate is thickened to take measures against the weight of the optical dispersion compensating device, as shown in FIG. 3B, the upper shelf 11a and the lower shelf 12a are provided with the optical dispersion compensating device accommodating spaces 15a and 16a, respectively. The height dimension is slightly shortened from a and slightly shortened to b.

Therefore, there is a possibility that the optical dispersion compensating device cannot be accommodated. Therefore, an object of the present invention is to provide a shelf that solves the above-mentioned problems.

[0012]

According to a first aspect of the present invention, there is provided a shelf fixed to a rack, comprising: a reinforcing structure; an upper electronic device housing provided on the reinforcing structure; A lower electronic device housing portion provided below the structure portion and supported by the reinforcing portion, wherein the reinforcing structure portion is provided between the upper electronic device housing portion and the lower electronic device housing portion. Position to,
The upper electronic device accommodating portion is reinforced and the lower electronic device accommodating portion is reinforced.

According to a second aspect of the present invention, in the first aspect, the upper electronic device accommodating portion has a bottom plate portion, the bottom plate portion rests on the reinforcing structure portion, and the bottom plate portion is provided with the bottom plate portion. In this configuration, a top plate of the lower electronic device housing portion is formed.

According to a third aspect of the present invention, in the first aspect, the reinforcing structure is formed of a cross beam extending in the left-right direction. According to a fourth aspect of the present invention, in the first aspect, the lower electronic device accommodating portion has a bottom plate portion, and a suspension support for suspending the bottom plate portion of the lower electronic device accommodating portion with respect to the reinforcing structure. Is further provided.

According to a fifth aspect of the present invention, in the first aspect, the upper electronic device accommodating portion has a bottom plate portion, and the lower electronic device accommodating portion has a bottom plate portion. A part of the electronic device inserted and accommodated in the accommodating portion is fitted so as to sandwich the front end of the bottom plate portion of the upper electronic device accommodating portion, and is inserted and accommodated in the lower electronic device accommodating portion. A part of the mounted electronic device is fitted so as to sandwich the front end of the bottom plate of the lower electronic device housing portion.

According to a sixth aspect of the present invention, the upper electronic device accommodating portion and the lower electronic device accommodating portion each have a bottom plate portion and a beam surface extending left and right on the back surface side. A part of an electronic device mounted on the upper electronic device housing portion and the lower electronic device housing portion with the front cover mounted on the front surface of the shelf, further comprising a front cover mounted on the front surface of the shelf; Is sandwiched between the beam surface of the front cover and the front end of the bottom plate portion.

[0017]

FIG. 2 shows a shelf 40 according to one embodiment of the present invention. FIG. 1 is an exploded view of the shelf 40 of FIG. FIG. 3C shows a shelf 40 according to an embodiment of the present invention in comparison with a conventional example.

First, a brief description will be given. Shelf 40
Is a 2U shelf, and has a cross beam 41 at a position corresponding to the interference prevention gap 14 at the center in the height direction of the conventional shelf 10 shown in FIG. In this configuration, a lower electronic device housing 43 is provided below the cross beam 41. The cross beams 41 constitute a reinforcing structure, and reinforce the upper electronic device housing portion 42 and reinforce the lower electronic device housing portion 43. Thereby, the plate thickness of the plate forming the upper electronic device housing portion 42 and the lower electronic device housing portion 43 is t10, which is substantially the same as the plate thickness t0 of the plate forming the conventional shelf 10.

A gap corresponding to the gap 14 of the conventional shelf 10 is not provided between the upper electronic device housing portion 42 and the lower electronic device housing portion 43. The cross beam 41 is a conventional shelf 1
The height dimension of the electronic device housing space 44 in the upper electronic device housing portion 42 and the height of the electronic device housing space 45 in the lower electronic device housing portion 43 Do not shorten the dimensions. The cross beam 41 functions to support the weight of the electronic device housed in the upper electronic device housing portion 42 and to support the weight of the electronic device housed in the lower electronic device housing portion 43.

The structure of the shelf 40 will be described in detail. The cross beams 41-1, 41-2, and 41-3 are for reinforcing the strength of the shelf 40, have a length corresponding to the entire width of the shelf 40, and have a length corresponding to the entire width of the shelf 40 in the X1 and X2 directions. The shelf 40 extends in the depth direction of the shelf 40 indicated by Y1 and Y2, and is disposed in parallel at a position on the near side, a position on the middle of the shelf 40, and a position on the back side. Cross beam 4
1-1, 41-2, and 41-3 are provided at portions corresponding to the gaps 14 in the conventional shelf 10.

Each of the cross beams 41-1, 41-2, 41-3 is
The cross section has a shape having an inverted U-shaped portion 41a and projecting portions 41b and 41c which project laterally from both ends of the inverted U-shaped portion 41a. Therefore, the cross beams 41-1 and 41-2,
41-3 is lightweight, but has a high second moment of area and high bending rigidity. Therefore, this cross beam 41-
By using 1, 41-2 and 41-3, the strength of the shelf 40 is reinforced without unnecessarily increasing the weight of the shelf 40, and a countermeasure for weight reduction is realized.

The upper electronic device accommodating section 42 is generally formed by combining the above-mentioned cross beams 41-1, 41-2, 41-3, a first sheet metal member 50, and a second sheet metal member 51. It is. The first sheet metal member 50 has a sheet thickness of t10, and is formed with a bottom plate 50a and a side wall 50 formed by being bent (Z1 direction) above both ends in the X1 and X2 directions.
b, 50c, and a back wall 50d bent above the Y1 direction end. The first sheet metal member 50 is configured such that the bottom plate portion 50a is screwed to form the cross beams 41-1, 41-2, 41.
-3, and fixed to the upper surface of the cross beams 41-1, 41-2,
41-3. The rear wall portion 50d reinforces the first sheet metal member 50.

The second sheet metal member 51 has a plate thickness of t10 or less, and has a top wall portion 51a and a back wall portion formed by being bent below the end in the Y1 direction (Z2 direction). 51b. The second sheet metal member 51 is placed on the first sheet metal member 50, and both ends in the X1 and X2 directions of the top plate portion 51a are riveted to the upper surfaces of the side wall portions 50b and 50c. The center in the X1 and X2 directions of 51a is
The bottom plate portion 50a together with the partition member 52 extending in the Y1 and Y2 directions between the top plate portion 51a and the bottom plate portion 50a.
And extends in the Y2 direction, and is fixed to the cross beams 41-1, 41-2, 41-3 by rivets. The rear wall portion 51b of the second sheet metal member 51 is fixed to the rear wall portion 50d of the first sheet metal member 50.

The partition member 52 partitions the space 44, and the space 44 is divided into two left and right spaces 44-1 and 44-2. The lower electronic device housing portion 43 is roughly composed of the above-mentioned cross beams 41-1, 41-2, 41-3 and the first
The bottom plate portion 50a of the sheet metal member 50 of FIG.
Are combined.

The third sheet metal member 53 has a plate thickness of t10, and is formed with a bottom plate 53a and a side wall 53 formed by being bent upward (Z1 direction) at both ends in the X1 and X2 directions.
b, 53c, and a back wall 53d bent upward at the Y1 direction end. The third sheet metal member 53 is configured such that the upper ends of the side walls 53b and 53c are formed with rivets and the cross beams 41-53 are provided.
1, 41-2, 41-3, fixed to the lower surface,
1-1, 41-2, and 41-3 are in a hanging relationship.

The bottom plate portion 50 a of the first sheet metal member 50 forms the ceiling of the lower electronic device housing 43. Reference numeral 54 denotes a suspension support, which extends in the Y1, Y2 direction at the center in the X1, X2 direction, and has upper ends on the cross beams 41-1, 41-2, 41-2.
41-3 is riveted to the bottom plate 53 at the lower end.
a, X1, X2 of the bottom plate portion 53a
Hanging the center in the direction. The third sheet metal member 53 is X
Although the length in the X1 and X2 directions is long, that is, the span is long, the provision of the suspension supports 54 shortens the span.

The hanging support 54 functions in the same manner as the above-mentioned partition member 52, and partitions the space 45.
5 is divided into two left and right spaces 45-1, 45-2. Reference numerals 55 and 56 denote side plates, and L-shaped mounting brackets 57 and 58 are riveted, respectively.

The side plates 55 and 56 straddle the upper electronic device accommodating portion 42 and the lower electronic device accommodating portion 43, and are provided on both sides of the upper electronic device accommodating portion 42 and the lower electronic device accommodating portion 43. Riveted to The mounting brackets 57 and 58 of the shelf 40 are screwed to the rack 20, and the left and right sides are mounted on the rack 20. Mounting brackets 57, 58
Are formed at intervals corresponding to the pitch of the mounting screw holes on the rack 20.

When the shelf 40 is mounted on the rack 20, the cross beams 41-1, 41-2, 41-3 are located between the upper electronic device housing portion 42 and the lower electronic device housing portion 43. In addition, the upper electronic device accommodating portion 42 is reinforced and the lower electronic device accommodating portion 43 is reinforced, and the upper electronic device accommodating portion 42 and the lower electronic device accommodating portion 43 are located at a position therebetween. -1, 41-2, and 41-3.

Here, the features of the shelf 40 having the above structure will be described. (1) A heavy electronic device can be mounted. Cross beams 41-1, 41-2, 41-3 having high flexural rigidity are provided, and the cross beams 41-1, 41-2, 41-3 directly support the bottom plate portion 50a of the upper electronic device housing portion 42. Cross beam 41
-1, 41-2, 41-3 suspend and support the third sheet metal member 53, and the center of the bottom plate portion 53a is suspended from the cross beams 41-1, 41-2, 41-3 by the suspension support 54. Because there is.

(2) The height c of the electronic device housing space 44 of the upper electronic device housing portion 42 and the lower electronic device housing portion 43
The height dimension c of the electronic device housing space 45 does not become unnecessarily narrow. The height dimension c is longer than the height dimension b. For the following four reasons. Cross beams 41-1, 41-2, 41-3
Is disposed at a position corresponding to the gap 14 of the conventional shelf 10 in the height direction, does not attack the electronic device housing space, and therefore does not reduce the height dimension of the electronic device housing space. is there. This is because the provision of the cross beams 41-1, 41-2, and 41-3 eliminates the need to increase the thickness of the upper electronic device housing section 42. Cross beams 41-1 and 41-
This is because the provision of the suspension supports 54 in addition to the components 2 and 41-3 makes it unnecessary to increase the thickness of the third sheet metal member 53 constituting the lower electronic device housing section 43. This is because the bottom plate portion 50a of the upper electronic device housing portion 42 forms the ceiling of the lower electronic device housing portion 43, so that it is not necessary to provide a dedicated top plate in the lower electronic device housing portion 43.

(3) The upper electronic device housing portion 42 and the lower electronic device housing portion 43 can be constituted by common components. Next, the mounting of the heavier light dispersion compensating device on the shelf 40 attached to the rack 20 will be described.

As shown in FIG. 5, the light dispersion compensating device 60 has a bottom plate 61, a light dispersion compensating device main body 62 on the bottom plate 61, and a front plate 63 fixed to the front end of the bottom plate 61. At the lower end of the front plate 63, there is a flange portion 63a bent in the Y1 direction. The flange portion 63a is
The flange portion 63a and the bottom plate 61
There is a small gap 64 between them. Dimension q of gap 64
Is a value corresponding to the thickness t10 of the bottom plate portions 50a and 53a.

Of the bottom plate 61, the end in the X1 direction and Y2
A mounting bracket 65 is fixed near the direction end, and a stopper 66 is mounted on the mounting bracket 65. The stopper 66 is formed by bending a leaf spring into a hook shape. An optical fiber 68 is connected to a portion near the front side of the optical dispersion compensating device main body 62. The optical fiber 68 extends in the X1 direction.

As shown in FIG. 4, the optical dispersion compensating device 6
0 indicates that each of the spaces 44-1,
One for each 44-2, in the lower electronic device housing 43,
A total of four, one for each of the spaces 45-1 and 45-2, are inserted from the front side and mounted with being stopped by the elongated front cover 70. On the front cover 70, a beam surface 70a extending in the left-right direction is formed. This front cover 7
Reference numeral 0 denotes the female screws 5 of the bent portions 50e, 50f, 53e, 53f on both sides of the upper electronic device housing portion 42 and the lower electronic device housing portion 43, respectively.
It is screwed and fixed to 0g, 50h, 53g, 53h. In this state, the front plate 63 of the optical dispersion compensating device 60 is
Are the upper electronic device housing portion 42 and the lower electronic device housing portion 4
3 is sandwiched between the front end surfaces of the bottom plate portions 50a and 53a and the beam surface 70a of the front cover 70, and the light dispersion compensating device 60
Are X1, X2 directions, Y1, Y2 directions, and Z1, Z2
It is restrained and fixed so as not to move in the direction.

Even when the front cover 70 is removed, the optical dispersion compensating device 60 does not move in the X1, X2, Z1, Z2, and Y1 directions. Y1
As for the direction, the stopper 66 is not pulled out beyond the position where it hits the bent portion 50e.

(1) Regarding constraints in the X1 and X2 directions. In the upper electronic device housing portion 42 and the lower electronic device housing portion 43, guide members 80 extend and are fixed in the X1 and X2 directions on both sides of the bottom plate portions 50a and 53a in the Y1 and Y2 directions. is there. The mounted optical dispersion compensating device 60 is restricted from moving in the X1 and X2 directions by the guide member 80 and the partition member 52 or the suspension support 54.

A tapered portion 80 is formed at the end of the guide member 80 in the Y2 direction, as shown in an enlarged manner in FIG. The optical dispersion compensating device 60 is guided by the tapered portion 80 and is smoothly inserted. (2) Regarding constraints in the Y1 and Y2 directions.

As shown in FIG. 6, the optical dispersion compensating device 60 is configured such that the front plate 63 of the optical dispersion compensating device 60 has the bottom plate 5
It is restricted from moving in the Y1 direction by hitting the front end faces of Oa and 53a. On the end side in the Y2 direction, the surface 70a of the beam of the front cover 70 attached as described above locks the front plate 63 of the optical dispersion compensating device 60 to limit the movement of the optical dispersion compensating device 60 in the Y2 direction. Have been.

When viewed from the upper end, the front cover 70 is provided with the horizontal beam 41-1 or the top plate portion 51 of the second sheet metal member 51.
a, and does not bend in the Y1 direction when pressed. Front cover 70 and optical dispersion compensating device 60
A space 75 is formed between the front plate 63 and the front plate 63. An optical fiber 68 passes through this space 75.

(3) Constraints in the Z1 and Z2 directions. As shown in FIG. 6, each of the bottom plate portions 50
a, 53a, and the portion of the bottom plate portions 50a, 53a on the Y2 end side enters the gap 64. That is, the optical dispersion compensating device 60 is fitted via the bottom plate 61 and the front plate 63 so as to sandwich the front ends of the bottom plate portions 50a and 53a. Thereby, the optical dispersion compensating device 60 becomes Z1,
It is restrained so as not to move in the Z2 direction.

Next, a mechanism for preventing the optical dispersion compensating device 60 from accidentally falling will be described. Rack 40
Is removed from the rack 40 by removing the front cover 70 and pulling the optical dispersion compensation device 60 forward.

FIG. 8A shows a state in which the front cover 70 has been removed. When the optical dispersion compensating device 60 is pulled out, as shown in FIG.
6 is pulled out to the position where it hits the bent portion 50e, and is not pulled out any further. In this state, the stopper 66 is pushed by the fingertip as shown by an arrow 90, and the stopper 66 is bent and removed from the bent portion 50e. Then, the optical dispersion compensating device 60 is pulled out and taken out of the rack 40.

Therefore, even when the optical dispersion compensating device 60 is pulled vigorously, the optical dispersion compensating device 60 is kept in the position shown in FIG.
The optical dispersion compensating device 60 is stopped at the position shown in FIG.
An accident in which the optical fiber is accidentally dropped and damage to the optical fiber are prevented. The position shown in FIG. 8B is a position where the connection work of the optical fiber 68 to the connector 67 is possible.

The side of the stopper 66 in the Y1 direction is an inclined surface 66.
a of the stopper 6 due to the action of the inclined surface 66a.
Since the 6 is bent, it is not necessary to press the stopper 66 when mounting the optical dispersion compensating device 60. Therefore, mounting of the optical dispersion compensation device 60 is performed with good workability.

The mechanism for preventing the optical dispersion compensating device 60 from accidentally falling off functions effectively even when the front cover 70 is removed. Next, a modified example will be described. Instead of the cross beam 41, a cross beam 41A having a cross section shown in FIG. 9A may be used, or a cross beam 41B having a cross section shown in FIG. 9B may be used.

The shelf is not limited to the above-described two-stage structure, but may be a three-stage or four-stage structure. FIG. 10 shows a three-stage shelf 40A.

[0048]

As described above, according to the first aspect of the present invention, the reinforcing structure is located between the upper electronic device housing and the lower electronic device housing, and the reinforcing structure is mounted on the upper electronic device housing. It is located at a position between the device accommodating portion and the lower electronic device accommodating portion (a place that was a gap in a conventional rack), and reinforces the upper electronic device accommodating portion and reinforces the lower electronic device accommodating portion. The upper electronic device housing portion and the lower electronic device housing portion
Since the structure is reinforced in common by the reinforcing structure located between them, the reinforcing structure is not a gap in the conventional rack when the height of the rack is considered to be smaller. It is provided without making the space of the electronic device accommodating space unnecessary uselessly by using the place where it is, and therefore, compared with the case where the reinforcing structure is separately provided in the upper electronic device accommodating portion and the lower electronic device accommodating portion. Therefore, the space of the upper electronic device housing portion and the space of the lower electronic device housing portion can both be widened, and therefore, without unnecessarily narrowing the space,
Electronic devices that are heavier than the maximum weight of electronic devices that can be mounted on a conventional rack can be mounted. Since the height of electronic equipment tends to increase when the weight increases, it is effective to reinforce the electronic equipment without unnecessarily reducing the space.

According to the second aspect of the present invention, since the bottom plate portion of the upper electronic device housing portion is located on the reinforcing structure portion and forms the ceiling of the lower electronic device housing portion, the lower electronic device housing portion is formed. As compared with a configuration in which a dedicated top plate is provided, the space of the lower electronic device housing portion can be made wider. According to the third aspect of the present invention, since the reinforcing structure is configured by the cross beams extending in the left-right direction, the strength of the shelf can be reinforced without unnecessarily increasing the weight of the shelf.

According to a fourth aspect of the present invention, the lower electronic device accommodating portion has a bottom plate portion, and further has a suspending support for suspending the bottom plate portion of the lower electronic device accommodating portion with respect to the reinforcing structure portion. Therefore, when the lower electronic device accommodating portion has a large width and a plurality of heavy electronic devices are arranged side by side in the lower electronic device accommodating portion, the lower electronic device accommodating portion is utilized by utilizing the position between the electronic devices. The part can be reinforced effectively.

According to a fifth aspect of the present invention, a part of the electronic device inserted into, accommodated in, and accommodated in the upper electronic device housing is fitted so as to sandwich the front end of the bottom plate portion of the upper electronic device housing, and A part of the electronic device inserted, housed and mounted in the side electronic device accommodating portion is fitted so as to sandwich the front end of the bottom plate portion of the lower electronic device accommodating portion. It can be restrained so as not to move in the direction, and this restraint can be realized without inserting a special operation only by inserting the electronic device.

According to a sixth aspect of the present invention, there is further provided a front cover having a beam surface extending left and right on the rear surface side and attached to the front surface of the shelf, wherein the front cover is attached to the front surface of the shelf. In this configuration, a part of the electronic devices mounted in the upper electronic device housing portion and the lower electronic device housing portion is sandwiched between the beam surface of the front cover and the front end of the bottom plate portion. The device can be restrained so as not to move in the front-back direction.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a shelf according to an embodiment of the present invention.

FIG. 2 is a perspective view of a shelf according to one embodiment of the present invention.

FIG. 3 is a diagram showing the present invention in comparison with a conventional example.

FIG. 4 is a diagram showing mounting of an optical dispersion compensation device on the shelf of FIG. 2;

FIG. 5 is a diagram showing an optical dispersion compensation device.

FIG. 6 is a diagram showing a state where the optical dispersion compensation device is mounted on a shelf.

FIG. 7 is an enlarged view showing a guide member.

FIG. 8 is a diagram illustrating the operation of a stopper.

FIG. 9 is a view showing a modified example of the cross beam.

FIG. 10 is a diagram showing a modification of the shelf.

FIG. 11 is a perspective view showing a conventional shelf.

FIG. 12 is a diagram showing mounting of an optical dispersion compensation device on the shelf of FIG. 11;

[Explanation of symbols]

 Reference Signs List 40 shelf 41, 41-1, 41-2, 41-3 cross beam 42 upper electronic device housing portion 43 lower electronic device housing portion 44, 45 electronic device housing space 50 first sheet metal member 50a bottom plate portion 50b, 50c side wall portion 50d Back wall part 50e, 50f Bent part 50g, 50h Female thread part 51 Second sheet metal member 51a Top plate part 51b Back wall part 52 Partition member 53 Third sheet metal member 53a Bottom plate part 53b, 53c Side wall part 53d Back wall part 54 Suspension support 55, 56 Side plate 57, 58 Mounting bracket 60 Light dispersion compensation device 61 Bottom plate 62 Light dispersion compensation device main body 63 Front plate 63a Flange portion 64 Gap 66 Stopper 70 Front cover 80 Guide member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsuya Fujii 4-1-1, Kamidadanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Tetsushi Ueda 4-1-1 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa No. 1 Inside Fujitsu Limited

Claims (6)

[Claims] 1. A shelf fixed to a rack, comprising: a reinforcement structure; an upper electronic device housing provided on the reinforcement; and a support for the reinforcement under the reinforcement. A lower electronic device housing portion provided and provided, wherein the reinforcing structure portion is located between the upper electronic device housing portion and the lower electronic device housing portion to reinforce the upper electronic device housing portion. A shelf configured to reinforce the lower electronic device housing portion. 2. The upper electronic device housing portion has a bottom plate portion, the bottom plate portion rests on the reinforcing structure portion, and the bottom plate portion holds a top plate of the lower electronic device housing portion. The shelf according to claim 1, wherein the shelf is formed and formed. 3. The shelf according to claim 1, wherein the reinforcing structure is formed of a cross beam extending in the left-right direction. 4. The lower electronic device housing portion has a bottom plate portion, and further has a suspending support for hanging the bottom plate portion of the lower electronic device housing portion with respect to the reinforcing structure portion. The shelf according to claim 1, wherein: 5. The upper electronic device housing portion has a bottom plate portion, and the lower electronic device housing portion has a bottom plate portion. The lower electronic device housing portion is inserted into, housed, and mounted in the upper electronic device housing portion. A part of the electronic device fitted so as to sandwich the front end of the bottom plate portion of the upper electronic device housing portion, and a part of the electronic device inserted and housed in the lower electronic device housing portion. 2. The shelf according to claim 1, wherein the lower end is fitted so as to sandwich a front end of a bottom plate portion of the lower electronic device housing portion. 6. The upper electronic device housing portion and the lower electronic device housing portion each have a bottom plate portion, and have a beam surface extending left and right on the back surface side, and are attached to the front surface of the shelf. A part of the electronic device mounted in the upper electronic device housing portion and the lower electronic device housing portion in a state where the front cover is attached to the front surface of the shelf. 2. The shelf according to claim 1, wherein the shelf is sandwiched between a surface of the beam and a front end of the bottom plate portion.