JP5653661B2 - Optical line housing structure - Google Patents

Description

  The present invention relates to a housing structure for housing a plurality of optical lines connected to an optical communication network in a tray.

  Currently, FTTH (Fiber To The Home), which is a data communication service for homes using an optical cable, is becoming popular in ordinary homes. In this FTTH, a video signal and a communication signal transmitted via an optical cable installed outdoors are transmitted to a TV receiver or information communication via an optical receiver installed on an indoor or outdoor wall surface of a general house or the like. Transmitted to the device.

  FIG. 12 is a perspective view of a conventional optical receiver in a state where a cover portion is opened. The optical receiver 100 is configured by housing a photoelectric conversion unit 102 and a tray 103 for housing an optical fiber (not shown) in a casing 101. The tray 103 is provided with a cable fixing unit 104 and a surplus length processing unit 105. In the optical receiver 100 configured as described above, the outer cover of an optical cable (not shown) drawn from the outside is fixed by the cable fixing unit 104, and only the optical fiber is drawn. The optical fiber drawn out in this way is connected to another optical fiber via a mechanical splicer (not shown), and is connected to the photoelectric conversion unit 102 via an optical connector (not shown). The extra length portions of these optical fibers are accommodated by being wound around the extra length processing unit 105 (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent Application Laid-Open No. 2004-354884 Japanese Patent Application Laid-Open No. 2004-354885

  Here, as a mechanism for connecting optical cables and optical fibers, various optical connectors are provided in addition to the mechanical splicer, and using an optical connector makes it easier than using a mechanical splicer. Connection work may be possible. Therefore, it is conceivable to connect optical cables and optical fibers using an optical connector instead of a mechanical splicer even inside the optical receiver. In particular, as an optical connector, a jacket-type optical connector that can directly connect and connect an optical cable jacket has been proposed. The work of stripping off the covering can be omitted.

  In this way, when the jacket-holding type optical connector is used, the optical cable jacket drawn from the outside is fixed by the cable fixing portion as in the conventional housing structure shown in FIG. Instead of drawing out, it is conceivable that an optical cable drawn from the outside is introduced into the receiver as it is and this optical cable is connected to another optical fiber via a jacket-type optical connector.

  However, the conventional housing structure is configured on the assumption that only the optical fiber is accommodated, and it is not assumed that both the optical cable and the optical fiber are accommodated. For example, in the conventional housing structure shown in FIG. 12, only one surplus length processing unit 105 is provided. Therefore, when both the optical cable and the optical fiber are accommodated, the surplus lengths of optical lines of different types are used. The part is wound around the same extra length processing unit 105, and the winding work becomes complicated by mixing different types of optical lines, which is an obstacle to improving workability.

  The present invention has been made in view of the above, and an object of the present invention is to provide an optical line housing structure that can cope with the housing of both optical cables and optical fibers.

In order to solve the above-described problems and achieve the object, the present invention according to claim 1 is a housing structure for housing a plurality of optical lines connected to an optical communication network in a tray, The optical line is an optical cable and an optical fiber, the optical cable and the optical fiber are connected to each other via an optical connector, and a cable fixing portion for fixing the optical cable is provided on one side surface of the tray. An optical cable housing portion for housing the optical cable; an optical fiber housing portion for housing the optical fiber; and an optical connector housing portion for housing the optical connector in the optical cable housing portion; An optical cable surplus length processing unit for accommodating the extra length portion of the optical cable in an arc shape is provided, and the extra length portion of the optical fiber is accommodated in the arc shape in the optical fiber accommodation portion. Provided an optical fiber extra length unit of order, and the optical cable extra length processing unit, and said optical fiber extra length processing unit, disposed at a position facing each other across the optical connector accommodating portion, of one of said tray In the optical line housing structure, the cable fixing portion is disposed at one corner portion of the corner portions at both end portions of the side surface, and the optical fiber extra length processing portion is disposed at the other corner portion.

According to a second aspect of the present invention, in the first aspect of the present invention, the tray includes a base portion and a stepped portion raised from the base portion, and is provided on a side surface of the stepped portion. An optical line housing structure in which the optical cable housing portion and the optical fiber housing portion have different heights in the direction perpendicular to the tray by disposing the optical cable housing portion.

According to a third aspect of the present invention, in the second aspect of the present invention, the tray includes a concave portion that is lowered from the step portion, and the optical connector housing portion is disposed in the concave portion. by the height in a direction perpendicular to the tray and the optical connector housing section the optical cable housing, and with each other at different heights, the optical fiber receiving portion, the periphery of the optical cable housing, said stage The height of the bottom surface of the optical connector housing portion in the direction perpendicular to the tray is substantially the same as the height of the bottom surface of the base portion in the direction perpendicular to the tray.

  According to the first aspect of the present invention, since the optical cable surplus length processing section and the optical fiber surplus length processing section are provided, the surplus length portion of the optical cable and the surplus length portion of the optical fiber are disposed at different positions. Long processing is possible, and it is possible to prevent the winding operation from becoming complicated due to the mixing of different types of optical lines, and workability can be improved. In particular, since the optical cable surplus length processing portion and the optical fiber surplus length processing portion are arranged at positions facing each other with the optical connector accommodating portion in between, the optical cable and the optical fiber are connected to each other via the optical connector accommodating portion. The optical cable extra length processing region and the optical connector extra length processing region can be more clearly separated from each other with the optical connector housing portion as a boundary, making it easier to mix different types of optical lines. Can be prevented.

According to the second aspect of the present invention, since the heights of the optical cable surplus length processing section and the optical fiber surplus length processing section in the direction orthogonal to the tray are different from each other, the optical cable and the optical fiber Can be accommodated at different heights, and the optical cable and the optical fiber can be accommodated smoothly without being mixed with each other.

It is a figure which shows the optical receiver which concerns on embodiment of this invention, (a) is a front view, (b) is a bottom view, (c) is a side view. It is a front view of an optical receiver in the state where a cover part was removed, and is a figure in the state where a tray was attached. It is a front view of the optical receiver in a state where a cover part is removed, and is a diagram in a state where a tray is removed. It is a figure which shows notionally an optical connector non-use type connection pattern. It is a figure which shows notionally an optical connector use type | mold connection pattern. It is a figure which shows the tray before mounting | wearing of an optical connector, (a) is a front view, (b) is a bottom view, (c) is a side view. It is a perspective view of the tray after mounting | wearing with an optical connector. It is a figure shown as a shaded area, after simplifying an optical cable accommodating part. It is a figure shown as a shaded area, after simplifying an optical fiber accommodating part. It is a disassembled perspective view of an optical cable connector, an adapter, an adapter accommodating part, and an optical fiber connector. It is an expansion perspective view of an optical cable surplus length process part periphery. It is a perspective view of the conventional optical receiver in the state where the cover part was opened.

  Exemplary embodiments of an optical line housing structure according to the present invention will be explained below in detail with reference to the accompanying drawings. [I] First, the basic concept of the embodiment will be described, then [II] the specific contents of the embodiment will be described, and [III] Finally, modifications to the embodiment will be described. However, the present invention is not limited to the embodiments.

[I] Basic Concept of Embodiment First, the basic concept of the embodiment will be described. This embodiment relates to a housing structure for housing a plurality of optical lines connected to an optical communication network in a tray.

  This accommodation structure is provided, for example, inside the optical receiver. An optical receiver is an optical network termination unit (ONU). In the following, in addition to a photoelectric conversion function for converting an optical signal transmitted through an optical line into an electrical signal, an optical line termination unit is used. A case having a long processing function will be described. However, the object to be provided with this accommodation structure is not limited to the optical receiver, and it is the same for any device as long as it can accommodate an optical line storage box, optical converter, or other optical line. Applicable.

  As long as the optical line is a line capable of transmitting an optical signal, its specific structure and name are arbitrary. In the following, the case of an optical cable and an optical fiber will be described. As an optical cable, a case will be described in which a single-core indoor cable is used in which tension members are arranged on both sides of an optical fiber and the optical fiber and the tension member are covered with a jacket (covering layer).

  One of the characteristics of this housing structure is a housing structure for housing a plurality of optical lines connected to an optical communication network in a tray, wherein the plurality of optical lines are an optical cable and an optical fiber, and the optical cable And the optical fiber are connected to each other via an optical connector, and an optical cable surplus length processing unit for accommodating the surplus length portion of the optical cable in an arc shape on one side surface of the tray, and the optical fiber An optical fiber surplus length processing section for accommodating the surplus length portion in an arc shape, an optical connector accommodating section for accommodating the optical connector, the optical cable surplus length processing section, and the optical fiber surplus length processing section Are arranged at positions facing each other across the optical connector housing portion. For this reason, the extra length portion of the optical cable and the extra length portion of the optical fiber can be processed at different positions from each other, and the winding work becomes complicated by mixing different types of optical lines. This can be prevented and workability can be improved. Note that “facing” means that the optical cable surplus length processing section and the optical fiber surplus length processing section are arranged at different positions via the optical connector housing section.

  Here, the type and specific structure of the optical connector are arbitrary, and a push-pull type SC connector or a screw-clamped FC connector can be adopted, and a connector to which an optical cable can be directly attached and a connector to which an optical fiber can be attached. Any of these may be adopted. In the following, a description will be given of a case in which an optical connector to which an optical cable can be directly attached (sheath grip type optical connector; hereinafter referred to as an optical cable connector) and an optical connector to which an optical fiber can be attached (hereinafter referred to as an optical fiber connector) are employed. In addition, when it is not necessary to distinguish these optical cable connectors and optical fiber connectors from each other, they are simply referred to as “optical connectors”.

[II] Specific Contents of Embodiment Specific contents of the present embodiment will be described below in detail with reference to the accompanying drawings.

(Basic configuration of optical receiver)
First, the basic configuration of the optical receiver 1 will be described. FIG. 1 is a diagram showing an optical receiver 1 according to the present embodiment, where (a) is a front view, (b) is a bottom view, (c) is a side view, and FIG. 2 is a cover part removed. FIG. 3 is a front view of the optical receiver 1 in a state where a tray is attached, and FIG. 3 is a front view of the optical receiver 1 in a state where a cover is removed, and a state where the tray is removed. It is. In the following description, the X direction in FIG. 1 is the left-right direction (or width direction), the Y direction in FIG. 1 is the up-down direction, and the Z direction in FIG. 1 is the front-back direction (or height direction).

(Connection pattern)
The optical receiver 1 is a communication device that relays various signals. First, in order to explain the signal relay function of the optical receiver 1, an optical cable or optical fiber connection pattern in the optical receiver 1 will be described. As this connection pattern, a plurality of connection patterns according to needs can be taken. Hereinafter, two typical connection patterns will be described. According to the tray (described later) of the present embodiment, at least any of these two typical connection patterns can be used to accommodate an optical cable, an optical fiber, or the like.

  First, an optical connector non-use type connection pattern will be described among two typical connection patterns. FIG. 4 is a diagram conceptually showing an optical connector non-use type connection pattern. This optical connector non-use type connection pattern is a connection pattern in which an optical fiber drawn from an optical cable using the cable fixing portion 61 is drawn into the optical receiver 1 and is used for connecting optical fibers. It is a connection pattern that uses a mechanical splicer but does not use an optical connector, and is a connection pattern that can accommodate an optical cable, an optical fiber, and the like even by the conventional tray shown in FIG.

  Specifically, in this connection pattern, the optical cable OC1 for transmitting the multiplexed video signal and communication signal is drawn into the optical receiver 1, and the optical fiber OF1 is connected from the optical cable OC1 via the cable fixing unit 61. The optical fiber OF1 is drawn out and connected to another optical fiber OF2 through the mechanical splice MS1. The optical fiber OF2 is connected to a WDM (Wavelength Division Multiplexing) filter F1. From the WDM filter F1, an optical fiber OF3 for transmitting a video signal and an optical fiber OF4 for transmitting a communication signal are drawn out. The video signal and the communication signal input via the optical cable OC1 and the optical fiber OF1 are separated by the WDM filter F1, and the video signal is output from the optical fiber OF3 and the communication signal is output from the optical fiber OF4.

  Among these, the optical fiber OF3 for video signals is connected to another optical fiber OF5 via the mechanical splice MS2, and this optical fiber OF5 is connected to the photoelectric conversion unit 20 via the optical fiber connector OFC1. A coaxial cable CC1 is connected to each of the two connection terminals 21 of the photoelectric conversion unit 20, and the coaxial cable CC1 connected to one connection terminal 21 is drawn into the house and connected to a TV receiver or the like. The coaxial cable CC1 connected to the connection terminal 21 is connected to a monitor device for monitor output. The video signal separated by the WDM filter F1 is photoelectrically converted by the photoelectric conversion unit 20, and then input to a TV receiver, a monitor device, or the like via the coaxial cable CC1.

  On the other hand, the communication signal optical fiber OF4 exiting the WDM filter F1 is connected to another optical fiber OF6 via the mechanical splice MS3. The optical fiber OF6 is drawn from the optical cable OC2 drawn into the optical receiver 1 through the cable fixing unit 61, and the optical cable OC2 is drawn into the house and connected to an information device or the like. The communication signal separated by the WDM filter F1 is input to the information device via the optical cable OC2.

  Next, an optical connector use type connection pattern will be described among two typical connection patterns. FIG. 5 is a diagram conceptually showing an optical connector use type connection pattern. This optical connector connection pattern is a pattern in which an optical cable is directly pulled into the optical receiver 1 without using the cable fixing portion 61, and a mechanical splicer is not used for connecting optical cables or optical fibers. This is an optical connector pattern, which is a connection pattern that could not be accommodated by the conventional tray shown in FIG.

  Specifically, in this connection pattern, the optical cable OC1 for transmitting the multiplexed video signal and communication signal is drawn into the optical receiver 1 and fixed by the optical cable holding and fixing unit 50f, and then the optical cable connector OCC1. Connected to. The optical cable connector OCC1 is connected to the optical fiber connector OFC1 via the adapter AP1. The optical fiber OF2 is connected to the optical fiber connector OFC1, and the optical fiber OF2 is connected to the WDM filter F1. From the WDM filter F1, an optical fiber OF3 for transmitting a video signal and an optical fiber OF4 for transmitting a communication signal are drawn out. The video signal and communication signal input via the optical cable OC1 are separated by the WDM filter F1, and the video signal is output from the optical fiber OF3 and the communication signal is output from the optical fiber OF4.

  Among these, the optical fiber OF3 for video signals is connected to the photoelectric conversion unit 20 via the optical fiber connector OFC3. A coaxial cable CC1 is connected to each of the two connection terminals 21 of the photoelectric conversion unit 20, and the coaxial cable CC1 connected to one connection terminal 21 is drawn into the house and connected to a TV receiver or the like. The coaxial cable CC1 connected to the connection terminal 21 is connected to a monitor device for monitor output. The video signal separated by the WDM filter F1 is photoelectrically converted by the photoelectric conversion unit 20, and then input to a TV receiver, a monitor device, or the like via the coaxial cable CC1.

  On the other hand, the communication signal optical fiber OF4 exiting the WDM filter F1 is connected to the optical fiber connector OFC2. The optical fiber connector OFC2 is connected to the optical cable connector OCC2 via the adapter AP2. An optical cable OC2 is connected to the optical cable connector OCC2, and after the optical cable OC2 is fixed by the optical cable holding and fixing portion 50e, it is drawn into the house and connected to an information device or the like. The communication signal separated by the WDM filter F1 is input to the information device via the optical cable OC2.

  In addition to the connection patterns shown in FIGS. 4 and 5, various connection patterns can be employed. For example, the form of drawing out the optical fibers OF2 to OF5 from the WDM filter F1 can vary depending on the type and model of the WDM filter F1, and accordingly, the connection patterns illustrated in FIGS. The contents described below and FIGS. 6 to 11 show examples of housing optical connectors and the like when the optical connector use type connection pattern of FIG. 5 is adopted, unless otherwise specified. 6, 8, and 9, the optical connector and the like are omitted, and in other drawings, a part of the optical cable and the optical fiber is omitted.

(Specific configuration of optical receiver)
Next, a specific configuration of the optical receiver 1 for achieving such signal transmission will be described. As shown in FIGS. 1 to 3, the optical receiver 1 is configured by detachably storing a photoelectric conversion unit 20, a power supply device 30, and a tray 40 inside a housing 10.

  Among these, the housing | casing 10 is a structure of the optical receiver 1, and is a protection means which protects the tray 40 and the photoelectric conversion unit 20 from the outside. The housing 10 includes a substantially box-shaped base portion 11 with one side open, and a cover portion 12 that substantially covers the base portion 11 from the open surface side. The cover portion 12 is a base portion. 11 is pivotally supported with respect to 11. In the state where the cover portion 12 is closed and the base portion 11 is substantially covered, a pair of lead-in ports 13 are formed at positions facing the base portion 11 and the cover portion 12, and an optical cable is connected via the lead-in port 13. The optical cable can be drawn out from the inside of the housing 10 to the outside. Further, the above-described connection terminal 21 of the photoelectric conversion unit 20 is exposed to the outside of the housing 10 on the side of the drawing port 13, and a coaxial cable can be connected to the connection terminal 21. In addition, this housing | casing 10 can be comprised similarly to patent document 1 except the structure which mentions specially.

  The photoelectric conversion unit 20 is a photoelectric conversion unit that converts an optical signal into an electric signal. The photoelectric conversion unit 20 is formed in a substantially rectangular parallelepiped shape, and an optical fiber can be connected to a connection terminal (not shown) provided on the top via an optical fiber connector, and light is output by a photoelectric conversion circuit (not shown) provided therein. The signal can be converted into an electrical signal, and the electrical signal can be output to the coaxial cable CC1 via a pair of connection terminals 21 provided below the signal. In addition, this photoelectric conversion unit 20 can be comprised similarly to patent document 1 except the structure which mentions specially.

  The power supply device 30 supplies power to the optical receiver 1, and is detachably accommodated in a space formed above the photoelectric conversion unit 20 inside the housing 10. The AC power acquired from the commercial power source is converted into DC power and supplied to the photoelectric conversion unit 20.

  The tray 40 is a storage means for organizing and storing optical cables and optical fibers, and is detachably stored inside the housing 10. 6A and 6B are diagrams illustrating the tray 40 before the optical connector is mounted, where FIG. 6A is a front view, FIG. 6B is a bottom view, FIG. 7C is a side view, and FIG. FIG. The tray 40 is formed into a rectangular flat plate as a whole by injection molding or the like of resin, and an optical cable housing portion 50 for mainly housing an optical cable and an optical fiber are mainly housed on one side surface thereof. For this purpose, an optical fiber housing 60 is provided. The optical cable housing portion 50 is provided with an optical connector housing portion 51 for fixing the optical connector and an optical cable surplus length processing portion 52 for processing a surplus portion of the optical cable. The optical fiber housing 60 includes a cable fixing part 61 for fixing an optical cable, a splice fixing part 62 for fixing a mechanical splice, a filter fixing part 63 for fixing the WDM filter F1, and an optical fiber. An optical fiber surplus length processing unit 64 is provided for processing the surplus length portion.

  Schematically, an outer sheath of an optical cable drawn from the outside can be fixed to the cable fixing portion 61, and only the optical fiber drawn from between the outer sheaths is introduced into the optical receiver 1. . In addition, mechanical splices MS1 to MS3 (shown only in FIG. 4) can be detachably fixed to the splice fixing portion 62 when connected in the connection pattern of FIG. Further, the WDM filter F1 can be detachably fixed to the filter fixing portion 63. Further, the optical cable connectors OCC1 and OCC2, the adapters AP1 and AP2, and the optical fiber connectors OFC1 and OFC2 can be fixed to the optical connector housing 51 when they are connected with the connection pattern of FIG. The optical cable surplus length processing unit 52 accommodates the extra length portion of the optical cable when connected with the connection pattern of FIG. 5, and the optical fiber surplus length processing unit 64 is connected with the connection pattern of FIGS. In some cases, the extra length of the optical fiber is accommodated.

(Specific configuration of optical receiver-details of tray)
Next, each part of the tray 40 will be described in more detail. However, this tray 40 can be configured in the same manner as in Patent Document 1 except for the configuration specifically described. In particular, the cable fixing portion 61, the splice fixing portion 62, and the filter fixing portion 63 are the same as in Patent Literature 1. Detailed description thereof will be omitted.

  First, the optical cable housing part 50 and the optical fiber housing part 60 will be described. As described above, the optical cable housing portion 50 is a space portion that mainly houses an optical cable, and the optical fiber housing portion 60 is a space portion that mainly houses an optical fiber. Here, “mainly” means that it is not completely excluded that other things are accommodated, and a part of the optical fiber is accommodated in the optical cable accommodating portion 50 or the optical fiber accommodating portion 60. Means that a part of the optical cable can be accommodated. Further, “accommodating” means that the optical cable or optical fiber is accommodated in a predetermined space, and is not limited to the arcuate accommodation, and is accommodated in the optical cable surplus length processing unit 52 or the optical fiber surplus length processing unit 64. Is different.

  Specifically, the tray 40 includes a base part 41, an outer wall part 42, and a step part 43. An optical cable housing portion 50 is formed on the front surface of the step portion 43, and an optical fiber housing portion 60 is formed between the outer wall portion 42 and the step portion 43 (front surface of the base portion 41). In order to clarify each of these regions, the optical cable housing portion 50 is simplified in FIG. 8 and the optical fiber housing portion 60 is simplified in FIG.

  The base portion 41 is a rectangular plate-like body that forms the substrate of the tray 40. The outer wall portion 42 has a planar shape substantially following the planar shape of the housing 10, but the upper right portion in FIG. 6A is curved toward the center of the front surface, whereby the optical fiber is converted into the photoelectric conversion unit 20. An opening 50d is formed for connection. The outer wall portion 42 is raised so as to be substantially orthogonal to the base portion 41. The stepped portion 43 is raised so as to be substantially orthogonal to the base portion 41 except for a portion specially noted. Since the optical fiber housing portion 60 is formed on the rear side of the step portion 43 and the optical cable housing portion 50 is formed on the front surface of the step portion 43, the tray of the optical cable housing portion 50 and the optical fiber housing portion 60 is formed. The heights in the direction orthogonal to 40 are different from each other. Therefore, in a state where the optical cable is accommodated in the optical cable accommodating portion 50 and the optical fiber is accommodated in the optical fiber accommodating portion 60, the optical cable and the optical fiber are accommodated at different heights. Is prevented from being mixed.

  Next, the optical connector housing 51 will be described. Two optical connector housing portions 51 are provided side by side in the optical cable housing portion 50. Each optical connector housing 51 includes an optical cable connector housing step (optical cable connector housing) 51a, an adapter housing 51b, and an optical fiber connector housing step (optical fiber connector housing) 51c. FIG. 10 is an exploded perspective view of the optical cable connector OCC1 (or OCC2), the adapter AP1 (or AP2), the adapter housing 51b, and the optical fiber connector OFC1 (or OFC2).

  As shown in FIGS. 6 and 7, the optical cable connector housing step 51 a is a flat step substantially corresponding to the optical cable connectors OCC <b> 1 and OCC <b> 2, and has a concave shape recessed toward the rear side from the other portions of the step 43. It is formed as a part. Then, all or a part of the rear side of the optical cable connectors OCC1 and OCC2 can be accommodated in the optical cable connector accommodation step portion 51a. The height of the optical cable connector housing step 51a is substantially equal to the height of the step 43 with respect to the base portion 41. Therefore, the bottom surface of the optical cable connector housing step 51a and the bottom surface of the base portion 41 are substantially equal to each other. For this reason, the portion protruding to the front side of the optical cable connectors OCC1 and OCC2 can be minimized. Further, on the left and right and above the optical cable connector housing step 51a, there are formed inclined surfaces 51d that are directed rearward as they approach the optical cable connector housing step 51a. In a state where the optical cable is disposed along the inclined surface 51d, the bending radius of the optical cable is determined to be equal to or larger than the minimum allowable bending radius. Therefore, by arranging the optical cable along the inclined surface 51d from the step portion 43 to the optical cable connector housing step portion 51a, it is possible to prevent the optical cable from being bent at a radius greater than the minimum allowable bending radius, and to safely remove the optical cable. Can be turned.

  The adapter accommodating portion 51b is for accommodating the adapters AP1 and AP2 for mutually connecting the optical cable connectors OCC1 and OCC2 and the optical fiber connectors OFC1 and OFC2, and the optical cable connector accommodating step portion 51a and the optical fiber in the step portion 43. It is formed between the fiber connector housing steps 51c. Specifically, as shown in FIG. 10, the adapter accommodating portion 51b is formed as a U-shaped body projecting forward from the stepped portion 43, and the internal hollow space of the U-shaped body is formed by the adapters AP1, AP2. The adapters AP1 and AP2 can be accommodated by inserting the adapters AP1 and AP2 from the upper side toward the lower side in the internal hollow space. Cutout portions 51e are formed on the left and right sides of the adapter housing portion 51b, and the locking claws OFC1 and OFC2 of the optical fiber connectors OFC1 and OFC2 attached to the adapters AP1 and AP2 are formed from the cutout portions 51e. Since the user can operate the locking claws OFC1a and OFC2a from the front side, the optical fiber connectors OFC1 and OFC2 can be easily connected from the adapters AP1 and AP2 while the adapters AP1 and AP2 are housed in the adapter housing portion 51b. Can be removed.

  As shown in FIGS. 6 and 7, the optical fiber connector housing step 51c is arranged at a position corresponding to the optical cable connector housing step 51a with the adapter housing 51b interposed therebetween. The optical fiber connector housing step 51 c is a flat step substantially corresponding to the optical fiber connectors OFC 1, OFC 2, and is formed as a concave portion that is recessed rearward from the other portions of the step 43. . The entire optical fiber connector or a part on the rear side can be accommodated in the optical fiber connector accommodating step 51c. The height of the optical fiber connector housing step 51c is substantially equal to the height of the step 43 with respect to the base portion 41. Therefore, the bottom surface of the optical fiber connector housing step 51c and the bottom surface of the base portion 41 are mutually opposite. Since the heights are almost equal, the portion protruding to the front side of the optical fiber connectors OFC1, OFC2 can be minimized. In addition, inclined surfaces 51g are formed on the left and right sides of the optical fiber connector housing step 51c toward the rear side as they approach the optical fiber connector housing step 51c. Further, since an opening 51h communicating with the optical fiber extra length processing section 64 is provided below the optical fiber connector housing step 51c, the optical fiber connectors OFC1, OFC2 housed in the optical fiber connector housing step 51c. The optical fiber connected to can be linearly drawn out to the optical fiber extra length processing section 64 through the opening 51h. As described above, each optical connector accommodating portion 51 is provided near the center of the tray 40, and the mounting direction of each connector is set in the vertical direction, which is the longitudinal direction of the tray 40, so that optical cables and optical fibers are placed on the side surface of the tray 40. Each connector can be attached and detached with a margin so as not to hit. In addition, since each optical connector accommodating portion 51 is provided near the center of the tray 40 and an optical cable or optical fiber is accommodated around each optical connector accommodating portion 51, the optical cable or optical fiber is accommodated without affecting the minimum allowable bending radius. it can.

  Next, the optical cable surplus length processing unit 52 will be described. FIG. 11 is an enlarged perspective view of the periphery of the optical cable surplus length processing unit 52. The optical cable surplus length processing unit 52 is for processing a surplus length portion of the optical cable, and includes surplus length processing guides 52a to 52c. These extra length processing guides 52a to 52c are formed as a plate-like body protruding forward from the step portion 43 in a portion other than the optical connector housing portion 51 in the optical cable housing portion 50, and are formed on the optical cable connector housing step portion 51a. The optical cable connectors OCC1 and OCC2 are housed in a circular arc at a position along the routing route of the optical cable connected to the optical cable connectors OCC1 and OCC2, and along the routing route of the optical cable. That is, the optical cable connected to the optical cable connector OCC1 housed in the optical cable connector housing step 51a is pulled out from the optical cable connector housing step 51a along the surplus length processing guide 52a, and further removed along the surplus length processing guide 52b. It is rotated and reaches the cable fixing part 61 via the optical cable holding and fixing part 50e formed in the step part 43, and is drawn out of the optical receiver 1. On the other hand, the optical cable connected to the optical cable connector OCC2 housed in the optical cable connector housing step 51a is drawn out from the optical cable connector housing step 51a and routed along the extra length processing guide 52c, and formed in the base portion 41. The optical cable holding and fixing part 50f is reached to the cable fixing part 61 and pulled out of the optical receiver 1. These surplus length processing guides 52a to 52c are determined such that the bending radius of the optical cable routed along the surplus length processing guides 52a to 52c is equal to or greater than the minimum allowable bending radius. Therefore, by routing the optical cable along the extra length processing guides 52a to 52c, it is possible to prevent the optical cable from being bent at a radius greater than the minimum allowable bending radius. Further, the optical cable OC2 may pass through the right side of the extra length processing guide 52a. Since the optical cable can be securely fixed to the tray by the optical cable holding and fixing portions 50e and 50f, for example, even when the optical cable is pulled from outside the optical receiver 1, the optical cable holding and fixing portions 50e and 50f can be fixed and The excess length guides 52a to 52c can be maintained beyond the minimum allowable bending radius of the optical cable, and the optical cable can be reliably prevented from being damaged, and the connection state between the optical cable connectors OCC1 and OCC2 and the adapters AP1 and AP2 is adversely affected. There is nothing.

  Next, the optical fiber extra length processing unit 64 will be described. As shown in FIGS. 6 and 7, the optical fiber surplus length processing section 64 includes a surplus length processing guide 64a and an optical fiber presser 64b. The extra length processing guide 64a is formed as a plate-like body projecting forward from the step portion 43, and is formed at substantially the same height as the outer wall portion 42, and the optical fiber can be wound around the outer periphery once or a plurality of times. It is formed in a circular arc shape. Further, the surplus length processing guide 64a is determined so that the bending radius of the optical fiber wound around the surplus length processing guide 64a is equal to or greater than the minimum allowable bending radius. Therefore, by winding the optical fiber along the extra length processing guide 64a, it is possible to prevent the optical fiber from being bent at a radius greater than the minimum allowable bending radius. The optical fiber retainer 64b is for preventing the optical fiber wound around the surplus length processing guide 64a from jumping out, and is directed from the upper surface of the outer wall portion 42 toward the surplus length processing guide 64a or the surplus length processing guide. It is formed from the upper surface of 64a toward the outer wall portion. Here, a slight gap is formed between the distal end portion of the fiber retainer 64b and the extra length processing guide 64a and the outer wall portion 42, and the extra length processing guide 64a is connected to the optical fiber through this gap. It can be wound around the outer periphery of.

  Here, the optical cable surplus length processing section 52 and the optical fiber surplus length processing section 64 are arranged at positions facing each other with the optical connector housing section 51 interposed therebetween. That is, as shown in FIG. 6A, when the tray 40 is viewed from the front, the optical connector accommodating portion 51 is disposed at substantially the center of the top, bottom, left, and right of the tray 40, whereas the extra length of the optical cable. The processing unit 52 is disposed on the upper left side of the tray 40, and the optical fiber extra length processing unit 64 is disposed on the lower right side of the tray 40. Therefore, the optical cable surplus length processing unit 52 and the optical fiber surplus length processing unit 64 are arranged at positions separated from each other (at least positions that do not overlap each other) with the optical connector housing 51 as a boundary. For this reason, the extra length portion of the optical cable and the extra length portion of the optical fiber can be processed at different positions from each other, and the winding work becomes complicated by mixing different types of optical lines. This can be prevented and workability can be improved.

  Further, the optical cable extra length processing section 52 is disposed on the side close to the optical cable connector housing step 51a in the optical connector housing 51, and the optical cable connectors OCC1 and OCC2 housed in the optical cable connector housing step 51a. The optical cables OC1 and OC2 connected to can be smoothly introduced toward the optical cable surplus length processing unit 52.

  Further, the optical fiber extra length processing section 64 is disposed on the side close to the optical fiber connector housing step 51c in the optical connector housing 51, and the optical fiber housed in the optical fiber connector housing step 51c. The optical cable optical fibers OF2 and OF4 connected to the connectors OFC1 and OFC2 can be smoothly introduced toward the optical fiber extra length processing unit 64.

  Furthermore, the heights of the optical cable surplus length processing unit 52 and the optical fiber surplus length processing unit 64 in the direction orthogonal to the tray 40 are different from each other. That is, the optical cable surplus length processing unit 52 is provided on the front side of the stepped portion 43, and the optical fiber surplus length processing unit 64 is provided on the base 41. Therefore, the optical cable surplus length processing unit 52 and the optical fiber are provided. The extra length processing unit 64 is arranged at a different height by the height of the stepped portion 43. For this reason, an optical cable and an optical fiber can be smoothly accommodated without being mixed with each other.

(Effect of embodiment)
As described above, according to this embodiment, since the optical cable surplus length processing unit 52 and the optical fiber surplus length processing unit 64 are provided, the surplus length portion of the optical cable and the surplus length portion of the optical fiber are mutually connected. In addition, extra length processing can be performed at different positions, and it is possible to prevent the winding operation from becoming complicated due to the mixing of different types of optical lines, thereby improving workability. In particular, since the optical cable surplus length processing section 52 and the optical fiber surplus length processing section 64 are arranged at positions facing each other with the optical connector housing section 51 interposed therebetween, the optical cable and the optical fiber are mutually connected via the optical connector housing section 51. In the case of connection, the optical cable extra length processing region and the optical connector extra length processing region can be more clearly separated from each other with the optical connector accommodating portion 51 as a boundary, and different types of optical lines are mixed. This can be prevented more easily.

  Further, since the optical cable surplus length processing unit 52 is disposed in the vicinity of the optical cable connector housing step 51a and the optical fiber surplus length processing unit 64 is disposed in the vicinity of the optical fiber connector housing step 51c, the optical cable connector housing step 51a. The optical cables connected to the optical cable connectors OCC1, OCC2 can be smoothly introduced toward the optical cable extra length processing unit 52, and the optical fiber connectors OFC1, accommodated in the optical fiber connector housing step 51c, The optical cable optical fiber connected to the OFC 2 can be smoothly introduced toward the optical fiber extra length processing unit 64.

  In addition, since the heights of the optical cable surplus length processing unit 52 and the optical fiber surplus length processing unit 64 in the direction orthogonal to the tray 40 are different from each other, the optical cable and the optical fiber are accommodated at different heights. Thus, the optical cable and the optical fiber can be accommodated smoothly without being mixed with each other.

[III] Modifications to Embodiments While the embodiments of the present invention have been described above, specific configurations and means of the present invention are within the scope of the technical idea of each invention described in the claims. Any modification and improvement can be made. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved. For example, even if it is not possible to accommodate all of the optical connectors used for connecting the optical line, the object of the present invention is achieved as long as the connection workability can be improved by accommodating a part of the optical connectors. ing.

(About optical cable housing and optical fiber housing)
The optical cable housing portion 50 and the optical fiber housing portion 60 are not limited to those provided at different heights as described above, and may be provided at the same height. Even when these are provided at different heights, the optical cable housing part 50 may be disposed on the low level side, and the optical fiber housing part 60 may be disposed on the high level side.

(Optical connector housing)
Only one optical connector housing portion 51 may be provided, or three or more optical connector housing portions 51 may be provided. That is, based on the connection pattern inside the optical receiver 1, the number of optical connector accommodating portions 51 corresponding to the number of optical connectors used in the connection pattern can be provided. In the case where a plurality of the optical connector housing portions 51 are provided, the optical connector housing portions 51 are not necessarily arranged in parallel with each other, and may be disposed in a non-parallel position (for example, a serial position). In the above embodiment, the optical cable connectors OCC1 and OCC2 and the optical fiber connectors OFC1 and OFC2 are connected via the adapters AP1 and AP2. However, the optical cable connectors may be connected to each other via the adapter, or the optical fiber connectors. It is also possible to connect each other via an adapter. In this case, the optical connector housing 51 is formed in a shape that matches the shape of the optical cable connector or optical fiber connector used for the connection.

(Positional relationship between optical cable surplus length processing section and optical fiber surplus length processing section)
The optical cable surplus length processing section 52 and the optical fiber surplus length processing section 64 may be disposed at positions facing each other with the optical connector housing section 51 interposed therebetween, and an arrangement other than the above-described arrangement may be employed. For example, as shown in FIG. 6 (a), when the tray 40 is viewed from the front, the optical connector housing portion 51 is disposed substantially at the top, bottom, left, and right of the tray 40, and the optical cable surplus length processing portion 52 is The optical fiber surplus length processing unit 64 may be disposed on the upper left side of the tray 40. Alternatively, the optical connector accommodating portion 51 is disposed at the substantially center of the upper, lower, left, and right sides of the tray 40, the optical cable surplus length processing portion 52 is disposed at either the left or right in the upper and lower centers of the tray 40, The processing unit 64 may be disposed on either the left or right side of the upper and lower centers of the tray 40. In the case where a plurality of optical cable surplus length processing units 52 are provided, at least a part of the plurality of optical cable surplus length processing units 52 may be opposed to the optical fiber surplus length processing unit 64. When a plurality of long processing units 64 are provided, at least a part of the plurality of optical fiber surplus length processing units 64 may be opposed to the optical cable surplus length processing unit 52.
(Appendix)
The present invention described in attachment 1 is a housing structure for housing a plurality of optical lines connected to an optical communication network in a tray, wherein the plurality of optical lines are an optical cable and an optical fiber, The optical fibers are connected to each other via an optical connector, and an optical cable surplus length processing unit for accommodating the surplus length portion of the optical cable in an arc shape on one side surface of the tray, and the surplus optical fiber. An optical fiber surplus length processing section for accommodating a long portion in an arc shape, and an optical connector accommodating section for accommodating the optical connector, the optical cable surplus length processing section, and the optical fiber surplus length processing section, Are arranged at positions facing each other across the optical connector housing portion.
Further, in the present invention described in Appendix 2, in the present invention described in Appendix 1, the optical connector is an optical cable connector connected to the optical cable and an optical fiber connector connected to the optical fiber. The connector housing portion has an optical cable connector housing portion for housing the optical cable connector and an optical fiber connector housing portion for housing the optical fiber connector, and the optical cable surplus length processing portion is disposed in the vicinity of the optical cable connector housing portion. At the same time, the optical fiber extra length processing section is disposed in the vicinity of the optical fiber connector housing section.
Further, in the present invention described in appendix 3, in the present invention described in appendix 1 or 2, the heights of the optical cable surplus length processing section and the optical fiber surplus length processing section in a direction orthogonal to the tray are mutually determined. With different heights.
(Additional effects)
According to the present invention described in appendix 1, since the optical cable surplus length processing unit and the optical fiber surplus length processing unit are provided, the surplus length portion of the optical cable and the surplus length portion of the optical fiber are disposed at different positions. This makes it possible to prevent the winding operation from becoming complicated due to the mixing of optical lines of different types, thereby improving workability. In particular, since the optical cable surplus length processing portion and the optical fiber surplus length processing portion are arranged at positions facing each other with the optical connector accommodating portion in between, the optical cable and the optical fiber are connected to each other via the optical connector accommodating portion. The optical cable extra length processing region and the optical connector extra length processing region can be more clearly separated from each other with the optical connector housing portion as a boundary, making it easier to mix different types of optical lines. Can be prevented.
Further, according to the present invention described in Appendix 2, since the optical cable surplus length processing section is disposed in the vicinity of the optical cable connector housing section and the optical fiber surplus length processing section is disposed in the vicinity of the optical fiber connector housing section, the optical cable The optical cable connected to the optical cable connector accommodated in the connector accommodating portion can be smoothly introduced toward the optical cable extra length processing portion, and connected to the optical fiber connector accommodated in the optical fiber connector accommodating step portion. The optical cable optical fiber can be smoothly introduced toward the optical fiber extra length processing unit.
Further, according to the present invention described in Appendix 3, since the heights of the optical cable surplus length processing section and the optical fiber surplus length processing section in the direction orthogonal to the tray are different from each other, the optical cable and the optical fiber Can be accommodated at different heights, and the optical cable and the optical fiber can be accommodated smoothly without being mixed with each other.

DESCRIPTION OF SYMBOLS 1,100 Optical receiver 10, 101 Case 11 Base part 12 Cover part 13 Lead-in port 20, 102 Photoelectric conversion unit 21 Connection terminal 30 Power supply device 31 Power cord 40, 103 Tray 41 Base part 42 Outer wall part 43 Step part 50 Optical cable Housing portion 50d Opening portion 50e, 50f Optical cable holding and fixing portion 51 Optical connector housing portion 51a Optical cable connector housing step portion 51b Adapter housing portion 51c Optical fiber connector housing step portion 51d, 51g Inclined surface 51e Notch portion 51h Opening 52 Optical cable extra length processing Portions 52a to 52c, 64a Extra length processing guide 60 Optical fiber accommodating portion 61 Cable fixing portion 62 Splice fixing portion 63 Filter fixing portion 64 Optical fiber extra length processing portion 64b Optical fiber holder 104 Cable fixing portion 105 Extra length processing portion OC , OC2 cable OF1~OF6 optical fiber MS1~MS3 mechanical splice F1 WDM filter OCC1, OCC2 optical cable connector OFC1, OFC2 optical fiber connector OFC1a, OFC2a locking claw AP1, AP2 adapter CC1 coaxial cable

Claims (3)

A housing structure for housing a plurality of optical lines connected to an optical communication network in a tray,
The plurality of optical lines are optical cables and optical fibers,
The optical cable and the optical fiber are connected to each other via an optical connector,
On one side of the tray,
A cable fixing portion for fixing the optical cable;
An optical cable housing portion for housing the optical cable;
An optical fiber housing part for housing the optical fiber;
The optical cable housing portion is provided with an optical connector housing portion for housing the optical connector, and an optical cable surplus length processing portion for housing the surplus portion of the optical cable in an arc shape,
The optical fiber housing portion is provided with an optical fiber surplus length processing portion for housing the surplus portion of the optical fiber in an arc shape,
The optical cable surplus length processing section and the optical fiber surplus length processing section are arranged at positions facing each other with the optical connector housing section interposed therebetween,
Among the corners of both ends of one side of the tray, the cable fixing part is disposed at one corner, and the optical fiber extra length processing part is disposed at the other corner.
Optical line housing structure. The tray includes a base portion and a stepped portion raised from the base portion,
By arranging the optical cable housing portion on the side surface of the stepped portion, the height in the direction perpendicular to the tray of the optical cable housing portion and the optical fiber housing portion is set to a mutually different height,
The optical line housing structure according to claim 1. The tray includes a concave portion lowered from the stepped portion,
By disposing the optical connector accommodation part in the recess, a height in a direction perpendicular to the tray and the optical connector housing section the optical cable housing, and with each other at different heights,
The optical fiber housing portion is disposed at a position lowered from the step portion around the optical cable housing portion,
The height of the bottom surface of the optical connector housing portion in the direction orthogonal to the tray is substantially the same as the height of the bottom surface of the base portion in the direction orthogonal to the tray.
The optical line accommodation structure according to claim 2.

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