JP4627703B2 - Coupler module storage rack - Google Patents

Description

The present invention relates to a coupler module housing for a distribution optical coupler module used for construction of an optical fiber communication network.

The FTTH (Fiber To The Home) service is a service that realizes a high-speed Internet connection using an optical fiber.
Here, if one user uses one optical fiber, the introduction cost becomes very high compared to copper wire (telephone line), so PON shares one optical fiber with multiple users. (Passive Optical Network) is widely used. PON means 2 transmission lines
It is a star type network that branches to 32, and PON is an optical coupler that branches one optical signal to two or more outputs and couples two or more optical input signals to one output Is used. Since an optical coupler does not require a power source and is maintenance-free, a flexible network can be designed by installing optical couplers at a plurality of locations on the transmission path.

  In recent years, a technology called GE-PON (Gigabit Ethernet-Passive Optical Network) for realizing a gigabit FTTH service has been developed. GE-PON is technology that incorporates Gigabit Ethernet technology (registered trademark) into PON technology and realizes optical fiber communication at an ultra-high speed of 1 Gbps.

FIG. 7 shows a specific example of the GE-PON system. This GE-PON system (100) is installed in a center station (101), etc., in addition to an optical coupler (122) installed on a utility pole or in an apartment, etc., and is connected to a communication network (105) ( 12) an OLT (Optical Line Terminal) and a distribution optical coupler module (110) containing an optical coupler, an ONU (Optical Network Unit) (107) installed in a subscriber's house (103), and the like. Yes. Between the two, a single WDM (Wavelength Division Multiplexing) system is used in which a wavelength of 1490 nm is assigned in the downstream (center to subscriber direction) and 1310 nm is assigned in the upstream (subscriber to center direction). It communicates while handling like a fiber.
An optical coupler is interposed between one optical fiber on the transmission device side and a plurality of transmission lines on the user terminal side, and the optical fiber on the transmission device side (station side optical cable core) is branched by this optical coupler. PDS (Passive Double Star)
) Method.

FIG. 8 shows a GE-PON optical transmission apparatus installed in a center station or the like. This optical transmission device (12) has a line interface for connecting a power panel (109) for supplying power to the device and a not-shown station side optical cable core to a casing (115) forming the outer shape of the device. The PIF board (111) is a unit structure that can be attached by being inserted from the opening on the front surface of the housing.
To increase the number of lines (station side optical cable core and its branches), the PIF panel (111) is added by removing the PIF blank (113) that covers the opening on the front and inserting the PIF panel into the opening that appears. Is called.
Here, the casing (115) to which the power supply panel (109) and the PIF panel (111) are generally attached has a horizontally-long rectangular parallelepiped box shape for convenience of installation. Two power supply panels (109) are arranged side by side in parallel on the upper part of the front surface of the casing, with the horizontal direction as the longitudinal direction, while the PIF panel (111) is arranged in parallel with the lower part of the front surface of the casing in the longitudinal direction. Are arranged side by side (up to 16 in the figure are possible).

  On the front surface of each PIF board (111), an adapter (commonly referred to as an SC adapter (119)) for connecting a station side optical cable core is provided. The SC adapter (119) is connected to a connector (commonly referred to as an SC connector) at the end of the optical fiber core of the station side extending or connected from a distribution optical coupler module (110) described below.

  9 and 10 are schematic views showing the internal structure of the distribution optical coupler module. Here, FIG. 9 is a perspective view of the optical coupler module for distribution, and FIG. 10 is a plan view thereof. In these figures, the upper cover of the coupler module is removed.

The distribution optical coupler module (110) is a device for branching a single station-side optical cable core (114) into a plurality of subscriber-side optical cable cores (116). In the casing (118), a station side optical cable core (114), an optical coupler (122) (splitter) for branching the station side optical cable core, and a plurality (for example, eight) branched from the optical coupler ) Subscriber-side optical cable core (116) and a plurality of (for example, eight) adapters (commonly called SC-SC adapter (24)) provided at the end of the subscriber-side optical cable core. .

  On the front surface of the distribution optical coupler module (110), as shown in FIG. 9 and the like, an adapter for connecting the optical fiber cable (114) for transmitting the optical signal to the distribution optical coupler module is provided. ing. A plurality of subscriber-side optical cable cores (116) branched from the station-side optical cable cores by an optical coupler (122) are housed by being wound in a casing (118), and an SC-SC adapter (24 ) Are mounted side by side on the front of the casing.

The above-described distribution optical coupler module (110) is stacked in a necessary number of stages in a flat state on a cradle-shaped coupler module housing rack (126), and is placed in the upper or lower rack 125 of the optical transmission device (12). (See FIG. 11). Thus, the required number of SC-SC adapters (24) is secured by stacking the required number of optical coupler modules (110) on the coupler module housing rack (126). Yes.
The optical transmission device is fixed to the rack by aligning the opening formed in the flange-shaped flange portion 127 provided on the front left and right of the optical transmission device housing with the opening formed in the vertical frame of the rack. This is done by screwing a screw here. In general, a plurality of optical transmission apparatuses are accommodated in one rack.
JP-A-9-33733

The conventional optical coupler module for distribution described above has a flat horizontally long shape in which a plurality of adapters are arranged in the horizontal direction, and the optical fiber cable on the side of the station extends from each optical coupler module for distribution and is complicated. It is connected. For this reason, for example, when there is no abnormality in the PIF board but the optical signal does not pass, or when the local optical cable core is replaced with a normal PIF board that is defective and replaced, the distribution connected to this The task of finding the optical coupler module for use by tracing the optical fiber cable on the station side is complicated, and it is easy to cause a cable misplacement in the process of following the optical fiber cable for the station side. There was also.

Also, the coupler module housing rack on which the distribution optical coupler module is mounted as described above is housed in the rack housing shelf, but the rack housing shelf is limited in number, so it must be housed in one rack. Therefore, the number of optical transmission devices that can be used, that is, the number of SC-SC adapters of the distribution optical coupler module cannot be increased by a certain number or more.

The present invention was devised to solve the above-mentioned problem, clarifying the correspondence between a plurality of SC-SC adapters and the PIF panel to which the adapter is connected, and facilitating the handling to improve maintainability. Furthermore, by increasing the number of optical transmission devices that can be accommodated in one rack, the number of required SC-SC adapters of the distribution optical coupler module can be increased, and one rack can be used. and to provide a coupler module housing rack distribution optical coupler module which can be doubled number of lines.

In order to solve the above problem, the present invention forms the casing (18) forming the outer shape into a vertically long rectangular parallelepiped shape, and arranges the adapter (24) for connecting the subscriber side optical cable (16a) side by side in the vertical direction. In addition, the distribution optical coupler module (10) is arranged such that the position where the station side optical cable core is taken out from the distribution optical coupler module faces the connection position of the corresponding station side optical cable core with the optical transmission device. for mounting side by side a plurality of, a coupler module housing rack mounted extends in the cradle-like in front of the optical transmission device (12) (26), said coupler module housing rack was placed A slide that enables the distribution optical coupler module to slide in the lateral direction and fixes the distribution optical coupler module at a desired position on the coupler module housing rack. With a de mechanism, it provides a coupler module housing rack, characterized in that.

Further, according to the present invention, the casing (18) forming the outer shape is formed in a vertically long rectangular parallelepiped shape, and the adapter (24) for connecting the subscriber side optical cable (16a) is arranged in the vertical direction and is used for distribution. A plurality of distribution optical coupler modules (10) are placed side by side so that the position where the station side optical cable core is taken out from the optical coupler module and the connection position of the corresponding station side optical cable core with the optical transmission device face each other. In order to accomplish this, a coupler module housing rack (26) is attached to the front surface of the optical transmission device (12) so as to extend in the form of a pedestal. The coupler module housing rack mounts the distribution optical coupler module. an accommodation rack base for (26a), made from the hinge to the distal end of the housing rack maternal fall freely linked tipping body on the front side and (26c), the distribution light Kapuramo Yuru is attached to the tipping body, provides a coupler module housing rack, characterized in that.

  Here, it is also preferable that the coupler module housing rack is provided with a holding mechanism for controlling the fall of the fall body (26c).

  The coupler module receiving rack (26) includes a receiving rack base (26a) fixed to the optical transmission device (12) and a receiving rack main body (26b) for mounting a plurality of the distribution optical coupler modules. It is also preferable that the housing main body is capable of sliding out with respect to the housing base.

According to the optical coupler module housing rack according to claim 1 , the slide optical mechanism can be slid in the lateral direction and fixed at a desired position on the coupler module housing rack by the slide mechanism. After the distribution optical coupler module is placed on the optical coupler module housing rack, the connection position with the PIF board of the corresponding optical transmission device can be easily opposed.

According to the coupler module housing rack according to claim 2, mounting the optical coupler module tipping body coupled freely fall by a hinge to the distal end of the housing rack maternal hand overturning body fitted with optical coupler module front By tilting down, the back side of the optical coupler module can be turned upward. As a result, connection / removal of the SC connector at the end of the optical fiber cable at the end of the optical fiber cable for distribution to / from the SC adapter of the PIF panel, and the optical cable for the subscriber side to the SC-SC adapter of the optical coupler module for distribution. It is possible to easily connect and remove the SC-SC connector.
In addition, when using the coupler module housing rack of this claim, it is preferable to use an optical coupler module for distribution with an opening formed on the bottom surface. This makes it possible to use a distribution optical coupler module in which no opening is formed at the bottom.

Here, as in the third aspect of the invention, by providing a holding mechanism, the distribution optical coupler module can be prevented from overturning in a normal state, and the distribution optical coupler module can be fixed to the coupler module housing rack. In addition, the optical coupler module for distribution can be prevented from falling more than necessary even when it falls.

According to the coupler module housing rack according to claim 4, by pulling out by sliding the housing rack body for multiple mounting the dispensing optical coupler module with respect to accommodating rack base, for distributing an optical transmission device Since a wide space can be formed between the optical coupler module and the optical coupler module, the workability can be improved during maintenance and inspection.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a distribution optical coupler module used in the present invention and a coupler module housing rack of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing a state in which a coupler module housing of the present invention is attached to an optical transmission apparatus, and a distribution optical coupler module used in the present invention is mounted and fixed thereto, and FIG. It is XX sectional drawing of. In each drawing, for easy understanding, the structure of the optical transmission device and the distribution optical coupler module is simplified.

The optical transmission device 12 (OLT) shown in a simplified manner in the figure is similar to that already described in the background art, and supplies power to the device in a box-shaped housing 115 that forms the outer shape of the device. A unit structure in which a power supply panel 109 and a PIF panel 111 as a line interface for connecting the optical fiber cable 14 on the office side can be inserted and attached through an opening on the front surface of the housing. Two power supply panels 109 are arranged side by side in parallel on the upper part of the front opening of the casing 115 with the horizontal direction as the longitudinal direction, while the PIF panel 111 is arranged in parallel with the lower part of the opening on the front surface of the casing 115 in the longitudinal direction. Are arranged side by side.
The optical transmission device 12 is accommodated in a rack shelf that is a metal box frame, and is fixed to flange-shaped flange portions 127 provided on the left and right sides of the front surface of the optical transmission device casing. The opening formed is aligned with the opening formed in the vertical frame of the rack, and a screw is screwed into the opening.

On the other hand, the distribution optical coupler module 10 shown in FIG. 2 is for branching the station side optical cable core 14 connected to the optical transmission apparatus 12 into a plurality of subscriber side optical cable cores 16, and its outer shape. The casing 18 is configured to have a vertically long outer shape in which the lateral width is approximately the same as the lateral width of the PIF board 111 and the height is approximately the same as the height of the optical transmission device 12. Each distribution optical coupler module 10 is arranged to face the front side of each PFI board with a certain distance. A screw hole 31 is formed below the front surface of the casing 18 so as to be fixed to an optical coupler module housing 26 described later.

  In the casing 18, a part of the station side optical cable core 14, an optical coupler 22 for branching the station side optical cable core cables into a plurality (eight in the figure) of the subscriber side optical cable cables 16, and each subscriber side A plurality of adapters (SC-SC adapters 24) for connecting the subscriber side optical cable 16a are accommodated at the end of the optical cable core. Here, the plurality of SC-SC adapters 24 are arranged side by side in the vertical direction on the surface (back surface) of the casing 18 facing the optical transmission device 12. The station side optical cable core 14 extends from the lower position of the back surface of the casing 18 to the outside, and an SC connector 121 for connecting to the SC adapter 119 of the PIF panel 111 attached to the optical transmission device 12 is provided at the tip. ing.

  The station-side optical cable core 14 introduced into the bottom surface of the casing 18 is gently curved and connected to a distribution optical coupler 22 (splitter) that is bonded and fixed to the upper back of the front surface of the casing. The distribution optical coupler 22 branches the station side optical cable core 14 into a plurality of subscriber side optical cable cores 16. Each subscriber-side optical cable core 16 branched from the distribution optical coupler 22 is wound about one turn in the casing 18, and each SC-SC adapter 24 provided at the tip of the optical fiber core 16 is connected to the back surface of the casing 18 as described above. It is mounted so that it is aligned vertically. The SC-SC adapter 24 is connected to the SC-SC connector 123 at the end of the subscriber-side optical cable 16a. The subscriber-side optical cable 16a passes through the space between the distribution optical coupler module 10 and the optical transmission device 12, After being guided downward, it is led out. 2, in order to simplify the drawing, the SC-SC connector 123 is connected to only one SC-SC adapter 24 at the top, and the subscriber side optical cable 16a is extended therefrom.

  A plurality of such distribution optical coupler modules 10 are placed on an optical coupler module housing 26 described later, and are arranged at a certain distance on the front side of the optical transmission device 12.

According to the distribution optical coupler module 10 of the present embodiment, the casing 18 is formed in a vertically long rectangular parallelepiped shape, the adapters are arranged in the vertical direction, and the local optical cable core from the distribution optical coupler module 10 is arranged. The optical fiber module for distribution 10 and the PIF board 111 of the optical transmission apparatus 12 to which the distribution optical coupler module 10 is connected are made by making the take-out position of the line 14 and the connection position of the optical fiber cable 14 connected to the optical transmission apparatus 12 opposite to each other. Correspondence is clarified.
In addition, by using an optical coupler module housing 26 described later, the adapter 24 is arranged in the vertical direction on the surface of the casing 18 facing the optical transmission device 12, so that the PIF board of the optical transmission device and the coupler module for distribution are arranged. Since the connection distance can be shortened, it is possible to simplify the routing of the station side optical cable core.

  Further, by arranging the distribution optical coupler module on the front side of the optical transmission device, the number of optical transmission devices that can be accommodated in the rack by vacating the rack storage shelves that previously accommodated the distribution optical coupler module Can be increased. As a result, the number of SC-SC adapters of the distribution optical coupler module required can be increased, and the number of lines that can be handled by one rack can be increased.

  Next, an optical coupler module housing rack for mounting the distribution optical coupler module 10 of this embodiment and fixing it to the optical transmission device 12 will be described. FIG. 3 is an exploded perspective view of the optical coupler module housing rack used in this embodiment.

  The optical coupler module housing rack 26 of the present embodiment is for mounting / fixing the vertically distributing optical coupler module 10 thereon, and is attached to the front surface of the optical transmission device 12 so as to extend in the form of a pedestal. . The optical coupler module housing 26 is manufactured by bending a metal plate, and the housing base 26a fixed to the optical transmission device 12 and the plurality of distribution optical coupler modules 10 are placed on the housing base 26a. On the other hand, it is comprised from the accommodation frame main body 26b which slides like a drawer.

The housing base 26a has a substantially U-shape opening on the upper side constituting the cradle, and a flange-like leg portion 33 is formed at the end thereof. The accommodating frame 26a is inserted into the opening opened in the leg portion 33, and screwed into the opening of the flange portion 127 of the optical transmission device 12 and the opening of the rack, which are aligned, Attached to the rack together with the optical transmission device 12 (see FIG. 1).
In addition, on the left and right sides of the bottom surface of the housing base 26a, vertically long holes 35 that are parallel to the front-rear direction are formed in order to slide and pull out the housing base body 26b described below. Further, openings 37 are formed on the side wall surfaces standing on the left and right of the housing base 26a so as to be taken out downward through the subscriber side optical cable 16a connected to the SC-SC adapter 24 of the distribution optical coupler module 10. Yes.

On the other hand, the storage rack main body 26b is formed of a bottom surface of the storage rack main body 26b in contact with the upper surface of the bottom surface of the storage rack base 26a and a front wall surface standing in front of this surface. Two bolt holes 39 for passing bolts are formed at positions corresponding to the respective longitudinal elongated holes 26a.
Further, a horizontally elongated horizontal hole 41 is formed in the front wall surface of the housing body 26b at a height corresponding to the screw hole 31 below the front surface of the casing 18 of the distribution optical coupler module 10 described above.

  The receiving rack body 26b is placed so as to overlap the receiving rack base 26a attached to the optical transmission device 12, and the bolts inserted into the bolt holes 39 at the two left and right positions are inserted into the vertically elongated holes 35 of the receiving rack base 26a. Then, it is fixed to the housing frame 26a by fixing it with a nut from below. In addition, by slightly loosening each nut and pulling the accommodation rack body 26b, the accommodation rack body 26b can be slid with respect to the accommodation rack base body 26a. As a result, the space between the optical transmission device 12 and the distribution optical coupler module 10 can be expanded as necessary, and the workability can be improved during maintenance and inspection. In this case, the station-side optical cable core 14 extending from the casing 18 to the optical transmission device 12 needs to have a margin for allowing the accommodation rack body 26b to be pulled out in advance.

A horizontally long hole 41 is formed in the front wall surface of the housing body 26b. The screw hole 31 below the front surface of the casing 18 of the distribution optical coupler module 10 and the screw screwed into the screw hole constitute a slide mechanism. To do. The slide mechanism is configured to screw the distribution optical coupler module 10 into the accommodation rack by screwing screws passed through the oblong holes 41 from the front into the screw holes 31 of the distribution optical coupler module 10 placed on the accommodation rack body 26b. While being fixed to the main body 26b, this sliding screw is loosened slightly to allow the distribution optical coupler module 10 to slide in the lateral direction on the housing main body 26b.
With this slide mechanism, the distribution optical coupler module 10 is easily aligned after being placed on the optical coupler module housing 26 so that the connection position of the station side optical cable core 14 and the optical transmission device 12 faces each other. be able to.

4 is a perspective view of the optical coupler module for distribution used in the second embodiment as seen from the bottom surface side.
FIG. 6 is a perspective view of an optical coupler module housing rack used in Embodiment 2, and FIG. 6 is a cross-sectional view showing a state in which a distribution optical coupler module placed on the optical coupler module housing rack is turned over.
In addition, about the structure similar to Example 1 in a present Example, the code | symbol similar to the code | symbol used in Example 1 is attached | subjected, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 4, the distribution optical coupler module 10 of the present embodiment has substantially the same configuration as that of the distribution optical coupler module of the first embodiment. An opening 28 that allows passage of the local optical fiber 14 is formed.

On the other hand, the optical coupler module housing rack 26 shown in FIG. 5 has a housing base body 26a on which the distribution optical coupler module 10 is placed, and a fall body 26c that is connected to the tip of the housing base body 26a by a hinge 43 so as to be freely turned over. It consists of. The hinge and the fall body 26c constitute a fall mechanism.
The housing base 26a is a plate material having a substantially U-shape that opens on the front surface of the optical transmission device 12 and is attached in a cradle shape. A flange-like leg 33 is formed at the end of the housing base 26a. This is the same as the housing frame of the first embodiment. Further, on the front side of the side wall surface standing on the left and right of the bottom surface of the housing base 26a, a fall prevention hole 45 for preventing the fall of the fall body 26c described below is formed.
The overturning body 26c is connected to the tip of the housing base 26a via a hinge 43, and has bent portions 47 that are bent at right angles at both left and right ends thereof. In this bent portion, a 1/3 arc-shaped arc long hole 49 is formed through which a screw screwed into the fall prevention hole 45 on the left and right side wall surfaces of the housing base is passed. Further, as in the first embodiment, the falling body 26c includes a distribution optical coupler module 1.
A horizontally elongated hole 41 is formed in the horizontal direction at a height corresponding to the screw hole below the front surface of the zero casing 18.

In the distribution optical coupler module 10 described above, with the falling body 26c erected with respect to the housing base 26a, the horizontal direction of the falling body 26c is inserted into the screw hole 31 below the front surface of the casing 18 of the distribution optical coupler module 10. By screwing a screw through the hole 41, the screw is fixed to the optical coupler module housing rack 26. At this time, the bolt / nut penetrates and fixes both of the fall prevention hole 45 on the left and right side wall surfaces of the housing base 26a and the circular arc hole 49 formed in the bent portion 47 of the fall body 26c. Prevents falling.
On the other hand, at the time of maintenance inspection, etc., the bolt / nut passing through the fall prevention hole and the circular arc hole is slightly loosened, so that the fall body 26c falls to the front side, that is, the distribution optical coupler module 10 fixed to the fall body 26c. Can fall to the front side. At this time, as shown in FIG. 6, the station-side optical cable core 14 that extends outward from the lowermost portion of the back surface of the casing 18 of the distribution optical coupler module 10 and is connected to the PIF panel 111 of the optical transmission device 12 Since the opening 28 formed on the bottom surface of the casing 18 passes, the local optical cable core 14 is not greatly bent by the overturn of the distribution optical coupler module 10, and the bending in the casing 18 is eliminated conversely. It will be.
Note that the circular arc hole 49 in the bent portion of the fall body 26c allows the fall body 26c to fall only to an angle where the fall body 26c is flush with the bottom surface of the housing base 26a (holding mechanism). .

  According to the present embodiment, the overturned body to which the distribution optical coupler module is attached can be turned over to the front side as necessary. Therefore, during maintenance and inspection, the back of the distribution optical coupler module can be easily turned upward, and the space between the optical transmission device and the distribution optical coupler module can be widened. Workability will also be improved.

Also in this embodiment, similarly to the first embodiment, the optical coupler module housing rack is composed of a housing base body, a housing base body, a falling body, etc., and the housing base body is slid with respect to the housing base body and pulled out. Of course, it is possible.

  The structures of the distribution optical coupler module and the coupler module housing are not limited to the above-described embodiments, and can be changed as appropriate without departing from the spirit of the invention.

It is the figure which showed the state which mounted the optical coupler module for distribution on the cradle-shaped coupler module accommodation stand attached to the front surface of the optical transmission apparatus. It is XX sectional drawing of FIG. 1 is an exploded perspective view of an optical coupler module housing rack used in Embodiment 1. FIG. It is the perspective view which looked at the optical coupler module for distribution of Example 2 from the bottom face side. 6 is a perspective view of an optical coupler module housing rack used in Embodiment 2. FIG. It is sectional drawing which showed the state which fell the optical coupler module for distribution mounted on the optical coupler module accommodation stand. It is the figure which showed the specific example of the GE-PON system. It is the figure which showed the optical transmission apparatus of GE-PON. It is the schematic perspective view which showed the internal structure of the optical coupler module for distribution. It is the schematic plan view which showed the internal structure of the optical coupler module for distribution. It is the figure which showed the arrangement | positioning relationship between the conventional optical coupler module for distribution, and an optical transmission apparatus.

10, 110 Optical coupler module for distribution 12 Optical transmission device 14, 114 Station side optical cable core 16, 116 Subscriber side optical cable 16a Subscriber side optical cable 18, 118 Casing 22, 122 Optical coupler 24 Adapter (SC-SC adapter) )
28 Openings 26, 126 Coupler module housing 26a Housing base 26b Housing body 26c Inverting body 31 Screw hole 33 Leg 35 Vertically long hole 37 Opening 39 Bolt hole 41 Horizontal long hole 43 Hinge 45 Anti-falling hole 47 Bending part 49 Arc length Hole 100 GE-PON system 101 Center station 103 Subscriber's house 105 Communication network 107 ONU
109 Power supply panel 111 PIF panel 115 Case 119 SC adapter (adapter)
121 SC connector 123 SC-SC connector 125 Rack 127 Flange

Claims (4)

The casing (18) forming the outer shape is formed in a vertically long rectangular parallelepiped shape, and the adapter (24) for connecting the subscriber side optical cable (16a) is arranged in the vertical direction, and from the inside of the distribution optical coupler module In order to place a plurality of distribution optical coupler modules (10) side by side so that the take-out position of the station-side optical cable core and the connection position of the corresponding station-side optical cable core with the optical transmission device face each other, A coupler module housing rack (26) attached to the front surface of the optical transmission device (12) in a cradle shape,
The coupler module housing rack includes a slide mechanism that enables the optical coupler module mounted on the coupler to slide in the lateral direction and fixes the optical coupler module for distribution at a desired position on the coupler module housing rack. A coupler module storage rack characterized by that. The casing (18) forming the outer shape is formed in a vertically long rectangular parallelepiped shape, and the adapter (24) for connecting the subscriber side optical cable (16a) is arranged in the vertical direction, and from the inside of the distribution optical coupler module In order to place a plurality of distribution optical coupler modules (10) side by side so that the take-out position of the station-side optical cable core and the connection position of the corresponding station-side optical cable core with the optical transmission device face each other, A coupler module housing rack (26) attached to the front surface of the optical transmission device (12) in a cradle shape,
The coupler module housing rack includes a housing base body (26a) on which the distribution optical coupler module is mounted, and a fall body body (26c) that is connected to the front end portion of the housing base body so as to be able to fall forward by a hinge. Consists of
A coupler module housing rack, wherein the distribution optical coupler module is attached to the fallen body. The coupler module housing rack according to claim 2 , further comprising a holding mechanism for controlling the fall of the fall body (26c). The coupler module housing rack (26) includes a housing rack base (26a) fixed to the optical transmission device (12), and a housing rack body (26b) for mounting a plurality of distribution optical coupler modules. Have
The coupler module housing rack according to claim 1, 2 or 3 , wherein the housing rack body is slidable with respect to the housing rack base and can be pulled out.

Images