JP3841344B2 - Optical connection box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a plurality of unit accommodating portions for accommodating an optical communication device, a fusion tray for fusion-connecting an optical cord with a connector connected to the optical communication device and an external optical cable, and the like are provided in the storage rack body. In particular, the present invention relates to an improvement for enabling high-density mounting without impairing handling.
[0002]
[Prior art]
In an optical communication base station or the like, for example, an optical connection box 1 shown in FIGS. 10 and 11 is widely used as a connection structure between an external optical cable connected to a subscriber and an optical communication device in the station. (For example, refer nonpatent literature 1).
[0003]
[Non-Patent Document 1]
Nitto Kogyo Co., Ltd., product catalog 2002 edition P233-P235
[0004]
The optical junction box 1 is provided with a plurality of unit accommodating portions 3a, 3b, 3c, 3d, 3e for accommodating optical communication devices in the accommodating rack body 5, and one unit accommodating portion among them. 3e has a configuration equipped with a movable device mounting tray 11 in which the stored optical communication devices 7 and 8 can be pulled out to the outside of the storage rack body 5 by a predetermined length.
[0005]
The storage rack body 5 is usually equipped with mounting holes and the like in accordance with EIA standards, JIS standards, and the like.
The optical communication devices accommodated in the unit accommodating portions 3a, 3b, 3c, 3d are various devices and adapters for optical transmission connected by the optical cord 13 with a connector, and comply with EIA standards, JIS standards, etc. The rack is mounted on the storage rack body 5 while being accommodated in the cases 15a, 15b, 15c, and 15d.
[0006]
The illustrated optical communication device 7 is a fusion tray that fuses an optical cable 19 drawn from the outside into the storage rack body 5 to an optical cord 21 with a connector. Since the fusion tray 7 requires a large work space during the fusion process and maintenance, it is occupied in the storage rack body 5 by being mounted on the movable device mounting tray 11 as described above. Space is reduced. FIG. 10 shows a state in which the movable device mounting tray 11 is pulled out, and FIG. 11 shows a state in which the movable device mounting tray 11 is housed in the storage rack body 5.
[0007]
The optical communication device 8 is an adapter for connecting the optical cords with connectors to each other, and the optical cord with connector 21 pulled out from the fusion tray 7 is used for optical communication of the other unit accommodating portions 3a, 3b, 3c, 3d. It is connected to an optical cord 13 with a connector connected to the device.
[0008]
The optical cable 19 and the optical cord 13 that enter / exit on the movable device mounting tray 11 from the outside or another accommodating portion in the rack body 5 are provided with a surplus length that allows the movable device mounting tray 11 to move. .
In the conventional case, the optical cable 19 and the optical cord 13 entering and exiting the movable device mounting tray 11 are not particularly fixed on the movable device mounting tray 11. It is only fixed to the mount angle 5a, which is a non-movable part on the storage rack body 5, by the binding band 23.
[0009]
[Problems to be solved by the invention]
By the way, high-density mounting in the optical junction box 1 is increasing year by year, and as a result of the high-density mounting, the number of optical cords to be connected via the fusion tray 7 on the movable device mounting tray 11 is increased. It has become difficult to organize the parts in a compact manner.
Moreover, in the conventional extra length processing method, as is clear from comparison between FIGS. 10 and 11, the movable device mounting tray 11 is pulled out, and the movable device mounting tray 11 is placed in the storage rack body 5. Due to the large change in the accommodation form of the extra length portion of the optical cord 13 and the optical cable 19 between the accommodated state and some of the optical fibers are bent below the allowable limit when the tray is pulled out, the transmission characteristics deteriorate. As shown in FIG. 11, the accommodated optical cord 13 and the optical cable 19 are congested so as to be intertwined in the unit accommodating portion 3e, and the movable device mounting tray 11 itself is put in and out. There was a risk of difficulty.
[0010]
Further, as shown in the figure, in the conventional case where the optical cord 13 that accommodates the extra length on the movable device mounting tray 11 is fixed to the mount angle 5a only by the binding band 23, the binding band 23 has the inside of the cable bundle. As for the optical cord located at, the restraining force is weak and there are variations in the restraining force, so that the optical cord 13 located inside the bundle is moved by the tension acting on the cable bundle during the loading / unloading operation of the movable device mounting tray 11. As a result, an excessive load may be applied to some connector connecting portions, or the fitting connection by the connector may be disconnected.
[0011]
Although not shown in FIGS. 10 and 11 above, an external optical cable that may be connected in the future is accommodated in an empty portion of the movable device mounting tray 11 as a passing core wire. In some cases, in the conventional structure in which the cable extra length is simply placed on the movable device mounting tray 11, these passing core wires become obstructive when the movable device mounting tray 11 is put in and out. The extension / contraction of the other cable extra length is hindered, or the extra cord portion of the optical cord 13 or the optical cable 19 is congested, so that the accommodating portion of the passing core wire is blocked, or the extra length portion of the accommodated passing core cord is There was a risk of excessive bending.
[0012]
And in order to prevent the above inconveniences, if a large empty space is secured above the movable device mounting tray 11, the increase in the occupied space of the unit accommodating portion 3e equipped with the movable device mounting tray 11 causes other As a result, it was difficult to secure the unit accommodating portion, and high density mounting was impaired.
[0013]
The present invention has been made in view of the above-described problems, and an object thereof is to suppress a change in the accommodation form accompanying the insertion and removal of the optical cord housed in the movable device mounting tray and the extra length tray of the optical cable. Therefore, it is possible to prevent the operability of the tray loading / unloading operation from being deteriorated due to the congestion of the extra length of these optical cords and optical cables, and some optical cords and optical cables are not bent or tensioned during the tray loading / unloading operations. Providing an optical junction box capable of realizing high-density mounting by preventing the action, and furthermore, light capable of accommodating a passing core wire with excellent maintainability without impairing high-density mounting. To provide a connection box.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, an optical junction box according to the present invention includes, as described in claim 1, at least one unit accommodating portion that accommodates optical communication equipment includes an optical connecting box. Optical cord that is equipped with a movable device mounting tray that allows the communication device to be pulled out to the outside of the storage rack body by a predetermined length, and that enters and exits the movable device mounting tray from the outside or other housing in the rack body Is an optical connection box provided with a surplus length that allows the movable device mounting tray to move.
A rack-side cable fixture mounted on a non-movable part on the main body of the storage rack and a tray-side cable mounted on the movable device mounting tray for fixing an optical cord entering and leaving the movable device mounting tray. In addition to providing a fixing tool, a cable extra length necessary for moving the movable device mounting tray is provided between these cable fixing tools,
And the position of the tray-side cable fixture when the movable device-mounted tray is housed in the storage rack body, and the position of the tray-side cable fixture when the movable device-mounted tray is fully pulled out. The positions of the rack-side cable fixing tool and the tray-side cable fixing tool are set so that the rack-side cable fixing tool is positioned approximately in the middle.
[0015]
In the optical junction box configured as described above, when the movable device mounting tray is taken in and out of the storage rack main body, the optical cord and the optical cable that change the accommodation form are provided between the rack side cable fixture and the tray side cable fixture. Only the extra cable lengths placed in between are shortened to about 1/2 of the maximum pull-out length L of the movable device-mounted tray, and to the maximum when the tray is housed. The distance between the rack-side cable fixture and the tray-side cable fixture is the same in the pulled-out state.
Therefore, it is possible to suppress the change in the accommodation form accompanying the insertion and removal of the optical cord and the extra length portion of the optical cable accommodated in the movable equipment mounting tray, by the bending load that acts when the movable equipment mounting tray is taken in and out, etc. It is possible to prevent the accommodated cable extra length portion from being congested.
[0016]
Further, in order to achieve the above object, the optical connection box according to claim 2 is the optical connection box according to claim 1, wherein the tray-side cable fixture further includes a plurality of optical cables inserted therein. The plurality of optical cords entering and exiting the movable device mounting tray are individually fixed one by one by the grooves.
[0017]
In the optical junction box configured in this way, all the optical cords that are accommodated are held evenly one by one, as compared to the conventional case where a plurality of optical cords are clamped together only on the storage rack body side. Thus, it is possible to prevent the tension acting on the cable bundle when the movable device mounting tray is taken in and out from being concentrated on the optical cord having a weak holding power.
[0018]
Preferably, as described in claim 3, in the optical junction box, the tray-side cable fixture includes a plurality of clamp substrates connected in a stacked state, and each clamp substrate includes the optical cord. A plurality of grooves to be inserted may be arranged in parallel, and a plurality of optical cords entering and exiting from the movable device mounting tray may be fixed individually and in a multi-layered structure by the grooves.
In this way, the fixed state in which the optical cords are aligned and fixed one by one is formed in a multi-layered state, so that a large number of optical cords can be reliably aligned and held at high density in a smaller occupied space. can do.
[0019]
In order to achieve the above object, according to the optical junction box of the present invention, as described in claim 4, a plurality of unit housing portions for housing optical communication equipment are provided in the housing rack body. And at least one unit housing portion is an optical connection box equipped with a passing core wire storage unit for storing a passing core wire,
A base plate in which the passing core wire storage unit is detachably fixed to the storage rack body with a frontage dimension of the unit housing portion; and a storage case that is detachably mounted on the base plate and stores the passing core wire. It is provided with.
[0020]
If it does in this way, the passing core wire accommodated in an optical junction box is accommodated in a storage case, for example, is not mixed with the other optical cord and optical cable connected to a fusion tray etc.
Also, by attaching / detaching the base plate or the storage case, the work of storing the passing core wire in the storage case and the processing of the passing core wire stored in the storage case are performed in a large space outside the storage rack body. Can do.
[0021]
Further, in order to achieve the above object, the optical junction box according to claim 5 is the optical junction box according to claim 4, further comprising: a passing core wire entering and exiting the unit housing portion from the base plate. A positioning guide for restricting the passing position is provided.
[0022]
In the optical junction box configured in this way, the extra length of the passing core wire laid in the section from the introduction position and discharge position of the passing core wire to the passing core wire storage unit in the storage rack body, etc. Can be regulated by the positioning guide so as not to be less than or equal to the allowable bending radius of the optical fiber, and damage to the passing core wire due to excessive bending can be prevented.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an optical junction box according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
In the embodiment described below, the same components as those already described in FIG. 10 are denoted by the same or corresponding reference numerals in the drawing, and the description is simplified or omitted.
[0024]
1 and 2 show a first embodiment of an optical junction box according to the present invention. FIG. 1 is a perspective view of a state where a movable device mounting tray is pulled out, and FIG. 2 is shown in FIG. It is a top view which shows the form change of the cable extra length at the time of taking in / out operation | movement of the movable apparatus mounting tray.
[0025]
The optical connection box 31 of the first embodiment is used, for example, when an external optical cable connected to a subscriber is connected to an optical communication device in the station at an optical communication base station or the like. A plurality of unit accommodating portions 3a, 3b, 3c, 3d, 3e (both see FIG. 10) for accommodating optical communication equipment are provided in the accommodating rack body, and at least one unit accommodating portion 3e is provided. Is equipped with a movable device mounting tray 11 that allows the accommodated optical communication devices 7 and 8 to be pulled out to the outside of the storage rack body 5 by a predetermined length, and is provided outside the storage rack body 5 or other units in the rack body. The optical cord 13 and the external optical cable 19 that enter and exit the movable device mounting tray 11 from the housing portions 3a, 3b, 3c, and 3d are provided with an extra length that allows the movable device mounting tray 11 to move. To have.
[0026]
In the case of the present embodiment, the optical communication device 7 mounted on the movable device mounting tray 11 is fused to fuse the optical cable 19 drawn from the outside into the storage rack body 5 to the optical cord 21 with a connector. It is a tray. Since the fusion tray 7 requires a large work space during the fusion process and maintenance, as described above, the fusion tray 7 is mounted on the movable device mounting tray 11 and pulled out from the storage rack body 5. The work space is secured.
In FIG. 2, the movable device mounting tray 11 indicated by a solid line shows a state accommodated in the storage rack body 5, and the movable device mounting tray 11 indicated by a two-dot chain line indicates a state where the tray is drawn out to the maximum.
[0027]
The optical communication device 8 mounted on the movable device mounting tray 11 is an adapter for connecting the optical cords with connectors to each other. The optical cord 21 with the connector drawn out from the fusion tray 7 is connected to the other unit accommodating portion 3a. , 3b, 3c, 3d are connected to an optical cord 13 with a connector connected to an optical communication device.
The optical cable 19 drawn into the fusing tray 7 is introduced into the storage rack body 5 from the back of the storage rack body 5, temporarily fixed to the rack-side cable fixture 23 on the entire surface of the storage rack body 5, and then movable. It is drawn into the fusion tray 7 via a tray-side cable fixture 34 on the device mounting tray 11.
[0028]
In the case of the present embodiment, rack-side cable fixing that is mounted on the mount angle 5b that is a non-movable part on the storage rack body 5 is used for fixing the optical cord 13 and the optical cable 19 that go in and out of the movable device mounting tray 11. And a tray-side cable fixture 33, 34, 35 provided on the movable device mounting tray 11, and between the rack-side cable fixture 23 and the tray-side cable fixture 33, 34. Thus, an extra cable length necessary for moving the movable device mounting tray 11 is provided.
[0029]
Further, as shown in FIG. 2, the position of the tray-side cable fixtures 33 and 34 when the movable device mounting tray 11 is stored in the storage rack body 5, and when the movable device mounting tray 11 is pulled out to the maximum. The positions of the rack-side cable fixture 23 and the tray-side cable fixtures 33, 34 are set so that the rack-side cable fixture 23 is positioned approximately in the middle of the positions of the tray-side cable fixtures 33, 34. Yes.
Accordingly, if the total pull-out length of the movable device mounting tray 11 is L, the extra cable length necessary to allow the pulling operation of the movable device mounting tray 11 is L / 2 as shown in the figure.
[0030]
In the case of the present embodiment, as the rack-side cable fixture 23 and the tray-side cable fixtures 33 and 34, a binding band or a binding bracket for collectively clamping the cable bundle is used.
The tray-side cable fixture 35 that fixes the optical cord 13 between the tray-side cable fixture 33 and the adapter 8 has a plurality of grooves 41 into which the optical cord 13 is inserted, as shown in FIG. Are arranged side by side, and a plurality of optical cords 13 entering and exiting on the movable device mounting tray 11 are individually fixed by the grooves 41 one by one.
[0031]
The opposing side wall 43 constituting the groove 41 is provided with a locking projection 45 projecting into the groove 41 so as to extend in the vertical direction, and the PVC coating of the optical cord 13 into which the locking projection 45 is pushed into the groove 41. The optical cord 13 is held in the groove 41 by pressing and deforming the surface.
Further, in the case of the tray-side cable fixture 35, a pressing piece 47 that extends above the groove 41 is formed on one end side of the opposing side wall 43, and the light in which the pressing piece 47 is fitted into the groove 41. The cord 13 is retained.
[0032]
According to the optical connection box 31 described above, the optical cord 13 and the optical cable 19 that change the accommodation form when the movable device mounting tray 11 is taken in and out of the storage rack body 5 are connected to the rack side cable fixture 23 and the tray side. Only the cable surplus length portions accommodated between the cable fixtures 33 and 34 are reduced to about ½ of the maximum drawer length L of the movable device mounting tray 11, The separation distance between the rack-side cable fixture 23 and the tray-side cable fixtures 33 and 34 is substantially the same when the tray is housed and when it is pulled out to the maximum.
Therefore, it is possible to suppress a change in the accommodation form associated with the insertion and removal of the tray at the extra length portion of the optical cord 13 and the optical cable 19 accommodated in the movable device mounting tray 11, and to bend when the movable device mounting tray 11 is inserted and removed It is possible to prevent the accommodated cable extra length from being congested by a load or the like.
[0033]
Accordingly, without increasing the empty space above the movable device mounting tray 11, it is possible to prevent the lowering of the operability of the tray loading / unloading operation due to the congestion of the extra length portions of the optical cord 13 and the optical cable 19. It is possible to prevent excessive bending and tension from acting on some of the optical cords 13 and the optical cables 19 during the tray loading / unloading operation, thereby realizing high-density mounting.
[0034]
Further, in the optical connection box 31 described above, compared to the conventional case where a plurality of optical cords 13 are collectively clamped only on the side of the storage rack body 5, all the stored optical cords 13 are connected to the tray-side cable fixture 35. Therefore, the tension applied to the cable bundle when the movable device mounting tray 11 is taken in and out can be prevented from being concentrated on the optical cord 13 having a weak holding power. Therefore, it is possible to prevent an excessive load from acting on a part of the connector connecting portions by the optical cord 13, and it is possible to prevent the connector from being damaged or disconnected due to the excessive load.
[0035]
Instead of the tray side cable fixture 35 described above, a tray side cable fixture 50 shown in FIG. 4 may be used.
The tray-side cable fixture 50 includes a plurality of clamp substrates 51 connected in a stacked state, and each clamp substrate 51 has a plurality of grooves 41 into which the optical cords 13 are inserted, and is mounted on a movable device. A plurality of optical cords 13 entering and exiting the tray 11 are fixed individually and individually in a multi-stage laminated structure by the grooves 41.
Although not shown in the figure, the PVC coating of the optical cord 13 is applied to the opposite side walls constituting the groove 41 in each groove 41 of each clamp substrate 51 as in the case of the tray-side cable fixture 35 described above. A locking projection 45 that is pressed and deformed is provided.
In the case of this embodiment, a plurality of stacked clamp substrates 51 are fastened together to a mounting shaft 53 planted on the movable device mounting tray 11 via a pressing metal 55 and fixed in a stacked state. The
[0036]
When the above-described tray-side cable fixture 50 is used, the fixed state in which the optical cords 13 are aligned and fixed one by one is formed in a multi-layered state, so that a large number of optical cords 13 can be placed one by one in a smaller occupied space. It can be reliably and densely aligned and held.
[0037]
Note that the type and arrangement of the optical communication devices provided on the movable device mounting tray 11 are not limited to the fusion tray 7 and the adapter 8 shown in the first embodiment.
2nd Embodiment and 3rd Embodiment which changed the kind and arrangement | positioning of the apparatus for optical communication with which the movable apparatus mounting tray 11 is equipped are shown in FIG. 5 thru | or FIG.
[0038]
In the second embodiment shown in FIG. 5 to FIG. 7, the fusion core 7 and the passing core wire storage unit 67 that stores the passing core wire 65 are mounted on the movable device mounting tray 11 as an optical communication device. Equipped with.
The passing core wire storage unit 67 includes a base plate 71 that is detachably fixed to the storage rack body 5 with a front opening size (opening) of the unit storage portion 3e, and similarly, a base with a front opening size (opening) of the unit storage portion 3e. A storage case 75 that is detachably mounted on the plate 71 and stores the passing core wire 65 is provided.
[0039]
The base plate 71 is detachable from the movable device mounting tray 11 by a detachable fitting (for example, a commercially available product ny latch) that is fastened to the movable device mounting tray 11 by rotating the knob 73.
The base plate 71 is provided with a positioning guide 79 that regulates the passage position of the passage core 65 that enters and exits the unit housing portion 3e.
[0040]
The storage case 75 is a resin foldable assembly box, and is detachably attached to the base plate 71 by fastening with Velcro (registered trademark) 77 fixed to the base plate 71.
In the configuration shown in FIG. 5, the fusion tray 7 is configured so that each core wire of the optical cable 19 is immediately fusion-connected to the optical cord 13, and the adapter 8 shown in FIG. 1 is omitted.
Further, as the tray side cable fixture for fixing the optical cords 13 one by one in an aligned state, the multi-stage tray side cable fixture 50 shown in FIG. 4 is used.
[0041]
In addition, a wiring duct 61 is provided between the fusion tray 7 and the tray-side cable fixture 50 to restrict the passage position of the cord in order to ensure the minimum allowable radius of the optical cord 13 to be installed.
A tray-side cable fixture 81 for fixing the passing core wire 65 to the movable device mounting tray 11 is provided at a position close to the storage case 75 on the movable device mounting tray 11. A rack-side cable fixture 83 for fixing the passing core wire 65 to the storage rack body 5 is provided at the wire entrance / exit.
[0042]
In the configuration shown in FIGS. 5 to 7, the passing core wire 65 housed in the optical connection box 31 is housed in the housing case 75 and connected to, for example, a fusion tray or the like, the other optical cord 13 or the optical cable 19. There is no mixing with. Therefore, even when the passing core wire 65 is accommodated on the movable device mounting tray 11, when the movable device mounting tray 11 is put in and out, these passing core wires 65 become an obstacle, and other cable extra lengths can be expanded and contracted. The passage core wire 65 can be mounted in a space-saving and high-density manner without being hindered.
Further, by attaching / detaching the base plate 71 or the storage case 75, the storage work of the passing core wire 65 in the storage case 75 and the processing for the passing core wire 65 stored in the storage case 75 can be performed on the storage rack body 5. This can be done in a large external space. Therefore, the passing core wire 65 can be accommodated in a state excellent in maintainability without impairing high-density mounting.
[0043]
Further, the above-described positioning guides are provided for the extra length portion of the passing core wire 65 laid in the section from the introduction position and discharge position of the passing core wire 65 in the storage rack body 5 to the passing core wire storage unit 67. By 79, the position can be regulated so as not to be less than or equal to the allowable bending radius of the optical fiber, and the passing core wire 65 can be prevented from being damaged by excessive bending.
[0044]
In addition, the installation position of the passing core wire storage unit 67 is not limited to the movable device mounting tray 11 as described above. If it can be operated from the opening front of the storage rack body 5, it can also be stored in another unit storage unit that is not equipped with a movable device mounting tray.
[0045]
In the third embodiment shown in FIGS. 8 and 9, the coupler module 85 is provided on the movable equipment mounting tray 11 as the optical communication equipment, and the fusing tray 7 is not provided.
The coupler module 85 has a large number of SC connector connection connectors 87 on the case surface, and connects the optical fiber cords 13 having the SC connectors.
The optical cord 13 connected to the coupler module 85 passes through the tray-side cable fixture 50 and the tray-side cable fixture 33 and is bundled to the rack-side cable fixture 23 on the storage rack body 5 side, so that other unit accommodating portions Connected to an optical communication device accommodated in the network.
In the form shown in FIG. 8, a cable guide 89 is provided between the coupler module 85 and the tray-side cable fixture 50 at an appropriate interval, and the laying position of each optical cord 13 is regulated by the cable guide 89. This prevents the optical fiber from being bent below the allowable radius.
[0046]
In addition, the equipment form of the unit accommodating part in a storage rack main body is not restricted to above-described embodiment. For example, the present invention can be applied to a storage rack body in which a plurality of vertically long unit storage portions are arranged in parallel in the horizontal direction.
[0047]
【The invention's effect】
According to the optical junction box of the present invention described in claim 1 to claim 3, the optical cord and the optical cable whose accommodation form changes when the movable device mounting tray is taken in and out of the storage rack main body are the rack side cable fixture. Only the cable extra lengths stored between the cable and the tray side cable fixture, and these cable extra lengths are reduced to about 1/2 of the maximum pull-out length L of the movable device mounting tray. The separation distance between the rack-side cable fixture and the tray-side cable fixture is the same in the housed state and the fully-drawn state.
Therefore, it is possible to suppress a change in the accommodation form accompanying the insertion and removal of the tray in the extra length portion of the optical cord and the optical cable accommodated in the movable equipment mounting tray, by the bending load that acts when the movable equipment mounting tray is taken in and out, It is possible to prevent the accommodated cable extra length portion from being congested.
Therefore, it is possible to prevent a drop in the operability of the tray loading / unloading operation due to the congestion of the extra length of the optical cord and the optical cable without increasing the empty space above the movable device mounting tray. During operation, high-density mounting can be realized by preventing excessive bending and tension from acting on some optical cords and optical cables.
[0048]
Further, in the optical junction box according to claim 2, as compared with the conventional case in which a plurality of optical cords are collectively clamped only on the side of the storage rack body, all of the optical cords stored are equally held one by one. It is possible to prevent the tension acting on the cable bundle when the movable device mounting tray is taken in and out from being concentrated on the optical cord having a weak holding force. Accordingly, it is possible to prevent an excessive load from acting on a part of the connector connecting portion by the optical cord, and it is possible to prevent the connector from being damaged or disconnected due to the excessive load.
[0049]
Further, in the optical junction box according to claim 3, since the fixed state in which the optical cords are aligned and fixed one by one is formed in a multi-layered state, a large number of optical cords can be arranged one by one in a smaller occupied space. It can be reliably and densely aligned and held.
[0050]
Further, in the optical junction box according to claim 4 and claim 5, the passing core wire accommodated in the optical junction box is accommodated in the storage case and is connected to, for example, another light connected to a fusion tray or the like. It is not mixed with cords or optical cables. Therefore, even when the passing cords are accommodated on the movable device mounting tray, when these movable device mounting trays are put in and out, these passing cords may interfere with the expansion and contraction of other cable extra lengths. Therefore, it is possible to mount the passing core wire in a space-saving and high-density manner.
Also, by attaching / detaching the base plate or the storage case, the work of storing the passing core wire in the storage case and the processing of the passing core wire stored in the storage case are performed in a large space outside the storage rack body. Can do.
Therefore, the passing core wire can be accommodated in a state excellent in maintainability without impairing the high-density mounting property.
[0051]
Further, in the optical junction box according to claim 5, the surplus length of the passing core wire laid in the section from the introduction position or discharge position of the passing core wire to the passing core wire storage unit in the storage rack body. The position of the portion or the like can be restricted by the positioning guide so as not to be less than or equal to the allowable bending radius of the optical fiber, and damage to the passing core wire due to excessive bending can be prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view of a state in which a movable device mounting tray of a first embodiment of an optical connection box according to the present invention is pulled out.
2 is a plan view showing a change in the extra cable length when the movable device mounting tray shown in FIG. 1 is put in and out. FIG.
3 is a perspective view of a tray-side cable fixture provided in the optical junction box of FIG. 1. FIG.
FIG. 4 is a perspective view showing another embodiment of the tray-side cable fixture according to the present invention.
FIG. 5 is a plan view showing a change in the extra cable length when the movable device mounting tray is inserted and removed in the second embodiment of the optical junction box according to the present invention.
6 is a cross-sectional view taken along the line AA in FIG.
7 is a perspective view of the movable device mounting tray shown in FIG. 5 as seen from the back side.
FIG. 8 is a plan view showing a change in the extra cable length when the movable device mounting tray is inserted and removed in the third embodiment of the optical junction box according to the present invention.
9 is a view taken in the direction of arrow B in FIG.
FIG. 10 is a perspective view showing a state in which a movable device mounting tray of a conventional optical connection box is pulled out.
FIG. 11 is a perspective view showing a state in which a movable device mounting tray of a conventional optical connection box is stored.
[Explanation of symbols]
3a, 3b, 3c, 3d, 3e Unit housing
5 Storage rack body
7 Fusing tray (optical communication equipment)
8 Adapter (Optical communication equipment)
11 Tray with mobile equipment
13 Optical cord with connector
15a, 15b, 15c, 15d case
19 Optical cable
21 Optical cord with connector
23 Rack side cable fixture
31 Optical connection box
33, 34, 35 Tray-side cable fixture
41 groove
43 Opposite side wall
45 Locking projection
47 Presser piece
50 Tray-side cable fixture
51 Clamp board
67 Passing cord storage unit
71 Base plate
75 storage case
79 Positioning guide
85 Coupler module (Optical communication equipment)

Claims (5)

At least one unit housing portion of the plurality of unit housing portions that house the optical communication device is equipped with a movable device mounting tray that allows the optical communication device to be pulled out to the outside of the storage rack body by a predetermined length, In addition, the optical cord that enters and exits the movable device mounting tray from the outside or another accommodating portion in the rack body is an optical connection box provided with an extra length that allows the movable device mounting tray to move. And
A rack-side cable fixture mounted on a non-movable part on the main body of the storage rack and a tray-side cable mounted on the movable device mounting tray for fixing an optical cord entering and leaving the movable device mounting tray. In addition to providing a fixing tool, a cable extra length necessary for moving the movable device mounting tray is provided between these cable fixing tools,
And the position of the tray-side cable fixture when the movable device-mounted tray is housed in the storage rack body, and the position of the tray-side cable fixture when the movable device-mounted tray is fully pulled out. The position of the rack side cable fixture and the tray side cable fixture is set so that the rack side cable fixture is located approximately in the middle of the optical connection box. The tray-side cable fixture has a structure in which a plurality of grooves into which the optical cords are inserted are arranged side by side, and a plurality of optical cords entering and exiting the movable device mounting tray are arranged one by one by the grooves. The optical connection box according to claim 1, wherein the optical connection box is fixed individually. The tray-side cable fixture includes a plurality of clamp substrates connected in a stacked state, and each clamp substrate includes a plurality of grooves for receiving the optical cords, and enters and exits the movable device mounting tray. The optical connection box according to claim 1, wherein a plurality of optical cords are fixed individually and in a multi-layered structure by the grooves. A plurality of unit housing portions for housing optical communication equipment are provided in the housing rack body, and at least one unit housing portion is provided with a passing core wire housing unit for housing a passing core wire. A connection box,
A base plate in which the passing core wire storage unit is detachably fixed to the storage rack body with a frontage dimension of the unit housing portion; and a storage case that is detachably mounted on the base plate and stores the passing core wire. An optical junction box comprising: The optical connection box according to claim 4, wherein a positioning guide that regulates a passing position of a passing core wire entering and exiting the unit housing portion is provided on the base plate.

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