JP4728356B2 - Optical wiring unit - Google Patents

Description

  The present invention relates to an optical wiring unit that accommodates an optical fiber connecting portion and an extra length of an optical fiber, and more particularly to an optical wiring unit that can be stored in a rack or the like and can be pulled out for maintenance.

Among the optical wiring units that store the optical fiber connection portion and the extra length of the optical fiber, there is a board-shaped optical wiring unit that is housed in a box such as a rack and pulled out for maintenance. For example, in Patent Document 1, an optical fiber inlet / outlet is provided on the side of the unit near the front of the rack, and optical adapters that connect the optical fibers from the left and right directions are arranged in a line in the front and rear direction at the center of the unit.
JP-A-2005-55748

In the above-mentioned Patent Document 1, the arrangement efficiency of the optical fiber in the optical wiring unit is improved by arranging the optical adapter and the like as described above. However, since the configuration of the above-mentioned Patent Document 1 moves the optical fiber entrance / exit back and forth in accordance with the drawing operation of the unit, the optical fiber drawn in front of the unit is temporarily drawn backward to enable it. We dealt with preprocessing. Specifically, the drawn optical fiber is arranged in a S-shape or a U-shape, for example, and then connected to an optical adapter or the like to enable the movement.
As described above, the conventional optical wiring unit requires an optical fiber accommodation space in the unit. Therefore, it cannot be said that the space utilization efficiency is sufficient. Further, if this space is narrowed, it is difficult to narrow the space because stress applied to the bent portion of the drawn optical fiber increases.

  Therefore, in view of such problems, the present invention has an object to provide an optical wiring unit that does not require an extra optical fiber length for the moving operation even if it is a drawable optical wiring unit. .

In order to solve the above-mentioned problems, the invention of claim 1 is an optical wiring unit that accommodates an optical fiber connecting portion and an extra length of an optical fiber, and can be drawn forward from a state of being accommodated in a box, The case includes a hinge for fixing to the box at either one of the left and right side portions on the front side which is a pulling direction of the case having a flat bottom surface that accommodates the optical fiber connecting portion and the extra length of the optical fiber. The bottom surface of the case is formed in a substantially fan shape with the rotation axis of the hinge as a center, and a substantially arc-shaped side surface is formed from the other end on the front side toward the side rear portion on the one end side. the optical fiber is arranged derived clamp for deriving from the introduction clamp and the casing is introduced into the casing, the front side end of the case by operating Shi pull out forward, said about the pivot shaft The case rotates Can drawn from the serial box body, a plurality of optical adapter for connecting the optical connector optical fibers, as well as arranged along the arc-shaped side surface of the case, the orientation of each of the optical adapter, connected The optical connector has a direction in which the optical connector is oriented substantially radially from the rotation axis of the case, and the space in the case between the row of optical adapters and the rotation axis is an optical fiber extra length accommodating portion. To do.
According to this configuration, since the optical wiring unit can be pulled out by a turning operation, and an entrance / exit composed of an optical fiber introduction clamp and a lead-out clamp is arranged near the rotation shaft with a small amount of movement, the light can be extracted by the unit drawing operation . The amount of movement of the fiber is small, and it is not necessary to arrange the extra length of the optical fiber in the vicinity of the entrance / exit in consideration of the movement by the drawer. Therefore, there is no need for an optical fiber accommodation space for that purpose, the utilization efficiency of the space in the optical wiring unit can be increased, and the size can be reduced. Furthermore, since the input and output lines of the optical fiber can be combined into one place, wiring work is easy, and the amount of movement of the inlet and outlet and the amount of bending of the optical fiber are small, so the stress applied to the optical fiber can be reduced.

In addition , the optical adapter is arranged in an arc along the arc-shaped side surface of the case, and the optical connector connection portion is arranged radially, so that the introduced optical fiber side optical fiber is arranged inside the arc-shaped optical adapter row. In addition, the optical fiber on the optical cord side led to the outside can be arranged, and the optical fiber can be arranged efficiently. And an optical fiber surplus length accommodating part can be provided inside the optical adapter row | line | column, and an optical fiber can be arrange | positioned efficiently.

According to a second aspect of the present invention, in the configuration according to the first aspect , a fusion tray for storing the fusion splicing portion of the optical fiber is installed between the optical adapter row and the rotation shaft of the case, The periphery is an optical fiber extra length accommodating portion.
According to this configuration, by installing the fusion tray between the optical adapter row and the rotation shaft of the case, the optical fiber connection portion, the optical fiber fusion portion, and the extra length storage portion can be arranged in a space-saving manner. The internal space can be used efficiently, and the optical wiring unit can be reduced in size.

  According to the present invention, since the optical fiber unit can be pulled out by a rotation operation, and the optical fiber entrance / exit is arranged near the rotation shaft that does not move at that time, the optical fiber near the unit entrance / exit by the unit extraction operation is arranged. The movement amount of the optical fiber is small, and it is not necessary to arrange the extra length of the optical fiber in the vicinity of the entrance / exit in consideration of the movement by the drawer. Therefore, there is no need for an optical fiber accommodation space for that purpose, the utilization efficiency of the space in the optical wiring unit can be increased, and the size can be reduced. Furthermore, since the input and output lines of the optical fiber can be combined into one place, wiring work is easy, and the amount of movement of the inlet and outlet and the amount of bending of the optical fiber are small, so the stress applied to the optical fiber can be reduced.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 shows an example of an optical wiring unit according to the present invention, where (a) is a plan view, (b) is a front view, and (c) is a left side view. In FIG. 1, 1 is a case, 2 is an optical adapter device for connecting optical fibers to each other using a connector, 3 is a fusion tray for storing a fusion splicing portion of the optical fibers, and 4 is a clamp for holding the optical fibers. An apparatus 5 is an introduction clamp that guides an optical fiber (optical cable) introduced into the case 1, and 6 is a lead-out clamp that guides an optical fiber (optical cord) led out from the case 1. Reference numeral 10 denotes an optical fiber disposed in the case 1, and 11 denotes an optical connector.

  The case 1 has a fan-shaped flat bottom 1a, a front plate 1b on the front side, a left side plate 1c on the left side, and a plurality of arc-shaped side portions extending from the front right end to the rear end of the left side. Side plates 1d, 1d,... Are provided. These are formed by bending a steel plate and are continuously formed from the bottom surface 1a. The front plate 1b has a uniform rectangular shape that closes the front surface of the case 1, and rack brackets 8 that can be assembled to a box such as a rack are provided at the left and right ends. However, the left rack fitting 8 is formed by using a hinge 9, and the left end portion of the front plate 1 b forms a rotation axis M for rotating the case 1.

  The optical adapter device 2 is formed by assembling a plurality of optical adapters 14 to the adapter holder 13, and a plurality of optical fibers 10 can be connected by one optical adapter device 2. The four optical adapter devices 2, 2,... Are similarly arranged in a circular arc with a certain distance from the arc-shaped side portion of the case 1, that is, each adapter device 2 is centered on the rotation axis M. The optical adapter device 2 is fixed by fixing the adapter holder 13 to the bottom surface 1 a of the case 1 with bolts 15 so as to draw a circular arc. By arranging in this way, the connected optical connectors 11 are installed radially oriented around the rotation axis M.

  The introduction clamp 5 and the lead-out clamp 6 are arranged in the order of the lead-out clamp 6 and the lead-in clamp 5 from the front in the vicinity of the hinge 9 on the left side surface. The introduction clamp 5 is assembled to the left side plate 1c and has a cylindrical cable holding portion 5a protruding from the left side plate 1c. The cable holding portion 5a is formed of a soft resin, can be deformed to easily change the introduction direction, and is formed so that no stress is applied to the introduced optical fibers (optical cables).

  On the other hand, the lead-out clamp 6 is installed on the bottom surface 1 a at a position slightly recessed from the side surface adjacent to the hinge 9. A ring-shaped holding portion 6 a that holds a plurality of optical fibers (optical cords) 10 is provided, and the optical fiber 10 is sent out in the same direction as the introduction clamp 5, that is, in the lateral direction. In addition, the side of the lead-out clamp 6 that is in front of the lead-out clamp 6 is opened, and the end of the bottom surface 1a is cut away so that the lead-out optical fiber 10 can be pulled out in addition to the side.

  Also, the box-shaped fusion tray 3 is installed at the approximate center of the bottom surface 1 a between the optical adapter device 2 and the rotation shaft M, and the left side plate 1 c side that is the right and left of the fusion tray 3. Clamp devices 4 are respectively installed on the front plate 1b side. By arranging in this manner, the optical fiber 10 wound around the fusion tray (accommodating space for the extra length of the optical fiber) is satisfactorily held.

  The space between the fan-shaped peripheral edge of the case 1 and the optical adapter device 2 is an optical fiber installation space that guides the optical fiber (optical cord) 10 connected to the optical adapter device 2 to the lead-out clamp 6, and is clamped at an appropriate position. A device 4 is arranged.

  As described above, the optical fiber 10 is disposed as shown by the imaginary line in FIG. 1 for each member assembled in the case 1. The introduced optical fiber (optical cable) 10 is extended by splicing the optical fiber as necessary, and the fusion splicing portion is stored in the fusing tray 3. The extra length of the optical fiber 10 drawn out from the fusion tray 3 is wound around the fusion tray 3 and held by the clamp device 4. Thereafter, the optical connector 11 provided at the tip is connected to one of the optical adapters 14 of the optical adapter device 2 from the inner side of the rotation axis M.

  And the optical connector 11 provided in the optical fiber (optical cord) 10 for drawing out the case 1 outside is connected to the corresponding outer optical adapter 14. The optical fiber 10 is appropriately held by the clamp device 4 installed in the optical fiber arrangement space at the fan-shaped peripheral edge and is arranged on the back of the front plate 1b. Then, after being wound around the fusing tray 3 as necessary, the lead-out clamp 6 is inserted and the case 1 is sent out.

Thus, since the optical adapter is similarly arranged in an arc shape along the arc-shaped outer shape of the case, and the optical connector connection portion is radially arranged, the introduced optical fiber on the optical cable side is connected to the arc-shaped optical adapter array. The optical fiber on the side of the optical cord led out to the outside can be arranged, and the optical fiber can be arranged efficiently. And an optical fiber surplus length accommodating part can be provided inside the optical adapter row | line | column, and an optical fiber can be arrange | positioned efficiently.
In addition, by installing the fusion tray between the optical adapter row and the rotation shaft of the case, the optical fiber connection part, optical fiber fusion part, and extra length storage part can be arranged in a small space, and the space inside the case is efficiently It can be used well and the optical wiring unit can be miniaturized.

FIG. 2 is an explanatory view showing a state in which the optical wiring unit having the above configuration is assembled to a rack, 16 is a rack, 17 is an assembled optical wiring unit, and an optical wiring unit 17a housed in a substantially central portion is pulled out. Indicates the state. As shown in FIG. 2, since it rotates around the front left end portion, the optical wiring unit 17 can be pulled out forward of the rack by removing the fixing screw at the right end portion and pulling it out.
In this way, the optical fiber unit can be pulled out by a pivoting operation, and the optical fiber entrance / exit is arranged near the pivot shaft with a small amount of movement at that time. Therefore, it is not necessary to arrange the extra length of the optical fiber in the vicinity of the entrance / exit in consideration of the movement by the drawer. Therefore, there is no need for an optical fiber accommodation space for that purpose, the utilization efficiency of the space in the optical wiring unit can be increased, and the size can be reduced.
Furthermore, since the input and output lines of the optical fiber can be combined into one place, wiring work is easy, and the amount of movement of the inlet and outlet and the amount of bending of the optical fiber are small, so the stress applied to the optical fiber can be reduced.

FIG. 3 shows a state in which the optical wiring unit is housed in a wall box attached to the wall. In FIG. 3, (a) is a front view of a wall surface box, (b) is a right side view, and (c) is a bottom view. Among these, (a) and (b) are perspective views and show the optical wiring unit 17 accommodated.
The wall surface box 19 is provided with a front door 20 and a side door 21, and the front and right sides can be opened and closed. The optical wiring unit 17 is vertically arranged with the front plate 1b facing right, and the upper and lower ends of the front plate 1b are screwed to be housed and fixed.

  In this way, the optical wiring unit may be installed vertically, and by opening the side door 21 and removing the upper screw fixing portion that fixes the front plate 1b, the lower end hinge 9 is the center. The optical wiring unit can be rotated and pulled out. The wall box can be operated without pulling out the optical wiring unit by opening the front door 20.

In the optical wiring unit of the above embodiment, in addition to screwing the hinge portion at the left end of the front plate 1b, the right end of the front plate 1b is also screwed and fixed to the rack frame or the like, but there is no hinge. The right end portion may be a simple locking structure instead of a structure that is fixed with screws. In addition, although the left end portion of the front plate is used as the rotating portion, it is needless to say that the right end portion may be used as the rotating portion.
Furthermore, the optical adapter device 2 is formed by assembling a plurality of optical adapters 14 into one adapter holder 13 to form a flat surface, and the optical adapter device 2 is installed with the rotation axis M facing each optical adapter device 2. The optical adapter holder 13 may be formed with a curvature matching the fan shape of the case 1, and the individual optical adapters 14 may be oriented on the rotation axis M.

An example of embodiment of the optical wiring unit which concerns on this invention is shown, (a) is a top view, (b) is a front view, (c) is a left view. FIG. 2 is an explanatory perspective view showing a state where the optical wiring unit of FIG. 1 is attached to a rack. It is explanatory drawing which shows the state which accommodated the optical wiring unit of FIG. 1 in the wall surface box, (a) is a front view, (b) is a right view, (c) is a bottom view.

Explanation of symbols

  1 .... Case, 2 .... Optical adapter device, 3 .... Fusing tray, 4 .... Clamp device, 5 .... Introduction clamp (entrance / exit), 6 .... Lead clamp (entrance / exit), 9 .... Hinges, 10 .... Optical fiber, 11 .... Optical connector, 14 .... Optical adapter, 16 .... Rack (box), 19 .... Wall box (box).

Claims (2)

An optical wiring unit that accommodates an optical fiber connection part and an extra length of an optical fiber, and can be drawn forward from a state of being accommodated in a box,
The case includes a hinge for fixing to the box at either one of the left and right side portions on the front side which is a pulling direction of the case having a flat bottom surface that accommodates the optical fiber connecting portion and the extra length of the optical fiber. with the bottom surface is formed in a substantially fan shape around the rotation axis of the hinge, to form a substantially arcuate side toward the front side and the other end to the side rear portion of the one end side,
An introduction clamp that introduces an optical fiber into the case and a lead-out clamp that is led out from the case are arranged on the side of the case near the hinge ,
The front side end of the case by operating Shi pull out forward, the casing is rotated about the pivot shaft can drawer from the box body,
A plurality of optical adapters for connecting optical fibers to each other by an optical connector are arranged along the arc-shaped side surface of the case, and the optical connectors for connecting the directions of the individual optical adapters are provided on the case. An optical wiring unit characterized in that it is oriented in a substantially radial direction from the pivot shaft, and the space in the case between the row of optical adapters and the pivot shaft is an optical fiber extra length accommodating portion . The light according to claim 1, wherein a fusion tray for accommodating a fusion splicing portion of the optical fiber is installed between the optical adapter array and the rotation shaft of the case, and the periphery of the fusion tray is an optical fiber extra length accommodating portion. Wiring unit.

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