JP2998762B2 - Shelf for optical cable introduction of optical communication equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shelf structure of a device used in an optical communication system, and more particularly to a novel structure for externally introducing and connecting an optical cable to an optical unit housed in a unit shelf. .

[0002]

2. Description of the Related Art As shown in FIG. 2, a plurality of unit shelves 20 accommodating an optical unit 24 are stacked and mounted on a rack 21 as shown in FIG.
0, the introduction shelf 22 provided on the top
The optical cable 23 is drawn in from the outside through the optical unit 23 and connected to the optical unit 24 inside the unit shelf 20.

Generally, the unit shelf is provided with a convection guide plate on an upper portion thereof for releasing an updraft generated by heat generated from the apparatus, so that the shelf for the optical cable introduction shelf is provided. It is difficult to secure sufficient space, and a height of only about 80 mm can be obtained.

[0004]

Therefore, there is a drawback that it is difficult to insert an optical cable into the introduction shelf from the rear of the rack and bundle it into a loop to form an extra length. Moreover, recently, in order to further increase the mounting efficiency of the rack, as shown in FIG.
Since the convection guide plate 25 is also provided in the inside,
Working conditions are getting worse. In particular, in this method, in order to introduce the optical cable, it is necessary to provide the convection guide plate 25 with a hole 26 large enough to allow a connector attached to the end of the optical cable to pass through. Could be reduced.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and provides a novel optical cable introduction shelf in which a convection guide plate is incorporated so that a rack mounting space can be effectively used and installation work is easy. The purpose is to:

[0006]

The object of the present invention is to provide a rectangular parallelepiped frame which is formed by left and right side plates and a horizontal beam member for connecting and fixing the left and right plates and having upper and lower surfaces and front and rear surfaces opened.
A convection guide having an inclined plate that is inclined forward along a diagonal of the side plate so as to partition the internal space of the frame up and down over the entire width, and the convection guide is inserted into and removed from the rear open surface of the frame. The present invention is achieved by an optical cable introduction shelf of an optical communication device, which is characterized by being mounted as possible.

[0007]

The optical cable introduction shelf of the present invention is mounted on a rack so as to be located above the unit shelf, as in the conventional apparatus. In order to introduce an optical cable from outside using this, remove the convection guide from the frame, place the optical cable introduced from the outside on the upper surface of the inclined plate with the rear drawn out through the rear open surface, and add a loop-shaped extra length. Form a part and place it in place. Then, the convection guide section is inserted and fixed again inside the frame. Thereafter, the optical fiber cable is led out toward the front of the device and connected to the optical unit in the lower shelf.

Hereinafter, based on a preferred embodiment shown in the drawings,
The present invention will be described in more detail.

[0009]

1 is an exploded perspective view of an optical cable introduction shelf according to the present invention. This shelf comprises a box-shaped frame 1, a convection guide 2 that can be inserted into and pulled out of the box-shaped frame 1, and a top plate 3. The frame 1 includes left and right side plates 4, horizontal connecting beams 5 for connecting and fixing the right and left side plates 4, and bent portions 6 provided along upper and lower edges of the side plates 4. Has an open rectangular parallelepiped shape.

A bracket 7 is fixed to both side plates 4, and is mounted by being screwed to a predetermined position of a rack (not shown) via this. The convection induction section 2
Has a size that can fit in the internal space of the frame 1, and when mounted in the frame, the inclined plate 2a is inclined forward and diagonally along the diagonal of the side plate 4, and the inclined plate 2a And a side wall 2b supported by the support. And the side wall 2
A part of the rear edge of b is bent inward to form a mounting portion 2c, through which the corresponding mounting portion 5a provided on both sides of the rear connecting beam 5 of the frame is attached by a known fastener 8. It is configured to be fixed.

In addition, cutout holes 9 and 9 'are provided on the left and right in the front region of the inclined plate 2a. The cutout hole serves as a passage for connecting the end of the optical cable to an optical unit housed in a unit shelf (not shown) mounted below the shelf. The hole 9 ′ which is not used is closed by a closing plate 10. One side of the closing plate 10 is bent upward to form a stopper 10a.

The front plate 3 is for covering the open front surface of the frame 1 and has a number of slits 11 for ventilation, and a screw is provided on a mounting portion 4a provided on the front surface of the side plate 4 of the frame. Stopped and fixed. In order to introduce an optical cable using the optical cable introduction shelf mounted at a predetermined position of the rack, an operator first locates the rear side of the rack, loosens the fastener 8 and places the convection guide 2 on the frame 1. And pull it out backward.

Next, the optical cables to be introduced are bundled to form a loop-shaped surplus portion, which is placed on the inclined plate 2a and positioned in a posture leaning against the stopper 10a of the closing plate 10. In this state, the convection guide 2 is inserted into the frame 1 through the rear opening, and is pushed along the side plate 4 and the bent portion 6 thereof. Then, the mounting portion 2c of the convection guide portion 2 comes into contact with the mounting portion 5a of the frame 1, and further insertion is prevented. Then, both are fixed by the fastener 8.

Next, the worker moves to the front side of the rack, picks up the tip of the optical cable on the inclined plate 2a, pulls it down through the open cutout hole 9, and connects it to the optical unit. Finally, the work is completed by mounting the front plate 3. The convection guide section 2 inserted and fixed in the frame 1 in this manner partitions the internal space of the frame 1 obliquely forward and downward, and divides the hot air rising from the lower unit shelf along the lower surface of the inclined plate 2a. To the back of the shelf to release to the outside.

The reason why the notch holes are provided at two places on the left and right sides of the inclined plate 2a is that the optical unit is usually mounted collectively on either the left or right area of the unit shelf. This is to enable common use in any of the cases. The unused hole is covered with a closing plate 10 so as not to impair the above-described hot air induction effect inherent in the convection induction section.

Further, a cushion member 12 is provided on the surface of the connecting beam 5 at the entrance of the optical cable formed between the rear edge region of the inclined plate 2a and the connecting beam 5 at the rear of the frame 1 facing the inclined plate 2a. Affixed. As a result, the optical cable introduced from the outside is softly gripped between the cushion member 12 and the inclined plate 2a, and its position is fixed without performing a special binding process, whereby a breakage accident can be prevented. .

[0017]

According to the present invention, in the optical cable introduction shelf also serving as the convection guide section, the portion of the convection guide section is detachably mounted rearward from the frame, so that the work of introducing the optical cable can be performed by the shelf. Can be performed externally, and workability is improved.

Further, since unnecessary openings are not provided in the convection induction section, the original hot air induction effect is not impaired. Cutout holes for cable extraction are provided on both left and right sides of the inclined plate, and one of them is used as necessary, so that shelves with the same specifications can be shared by optical communication devices with different optical unit mounting positions. Applicable.

Since a cushion member is attached to the optical cable entrance of the frame of the optical cable introduction shelf, and the optical cable is gripped between the optical cable and the convection guide through the cushion member, the holding of the optical cable is facilitated and the breakage of the optical cable is facilitated. Accidents can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an optical cable introduction shelf of the present invention.

FIG. 2 is a perspective view illustrating a configuration of a general optical communication device.

FIG. 3 is a perspective view of a conventional convection induction plate integrated introduction shelf.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Frame 2 ... Convection guide part 2a ... Inclination plate 3 ... Front plate 4 ... Side plate 5 ... Connecting beam 6 ... Bending part 7 ... Bracket 8 ... Fastener 9, 9 '... Notch hole 10 ... Closure plate 12 ... Cushion member

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Yamaji 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Tomoyuki Hongo 1015 Kamedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Fujitsu Limited ( 56) References JP-A-3-148605 (JP, A) JP-A-3-34393 (JP, A) JP-A-61-137901 (JP, U) JP-A-3-11203 (JP, U) Hei 3-86304 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 6/00 G02B 6/24 H05K 7/00

Claims (4)

(57) [Claims] 1. A rectangular parallelepiped frame (1) formed of left and right side plates (4) and a horizontal connecting beam (5) for connecting and fixing the plates (1) and having upper and lower surfaces and front and rear surfaces open. The inclined plate (2) which is inclined forward along the diagonal of the side plate (4) so as to partition the internal space of 1) up and down over the entire width.
a) a convection guide section (2) having a), wherein the convection guide section (2) is attached to the frame (1) so as to be insertable into and removable from a rear open surface thereof. Optical cable introduction shelf. 2. A cushion member (1 ) is attached to a connecting beam (5) of the frame facing a trailing edge region of the inclined plate (2a).
2. The shelf according to claim 1, wherein 2) is mounted and configured to grip an optical cable to be introduced. 3. A pair of left and right cutout holes (9, 9 ') for drawing out an optical cable are provided in the inclined plate (2a).
The shelf according to claim 1 or 2, wherein one of the shelves is adapted to be closed by a closing plate (10) if necessary. 4. The shelf according to claim 3, wherein the closing plate (10) also serves as a stopper (10a) for positioning the extra length of the optical cable on the inclined plate.