JP3816135B2 - closure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a closure provided with a housing structure for an optical fiber connection portion.
[0002]
[Prior art]
A closure for accommodating a connection portion of the optical fiber core wire is disposed at a connection portion of an optical fiber cable used as a communication cable. In this closure, there are an optical connector such as an MT connector for connecting optical fiber cores drawn from optical fiber cables arranged at both ends of the closure, and an extra length portion of the connected optical fiber core. In order to protect and store, an extra-length processing sheet and an optical connection unit storage case are provided.
[0003]
In the surplus length processing sheet, the surplus length portion of the optical fiber core wire is wound in a loop shape and stored so that the optical connection portion is located in the middle of the loop.
Further, in the optical connection part storage case, the optical connection parts are individually arranged in the optical connection part holding parts regularly arranged on the bottom of the planar storage case, and the extra length portions of the optical fiber core wires are provided on both sides thereof. It is stored in a loop.
[0004]
[Problems to be solved by the invention]
By the way, as the communication network using the optical fiber cable becomes widespread, the density and the number of the optical fiber cables are increasing, and the closure having the conventional storage structure tends to have insufficient capacity. There is a problem that the extra length portion is poorly accommodated, and the operations associated with connection and branching are difficult to perform.
[0005]
For example, according to the extra length processing sheet, since a plurality of optical connection portions are irregularly stored in the sheet, it is not easy to take out an arbitrary optical connection portion when actually performing a connection switching operation or the like. .
Moreover, according to the optical connection part storage case, since the optical connection part can be stored only in a plane, the storage density of the optical connection part is low.
[0006]
The present invention has been made in view of the above circumstances, and it is possible to store a connection portion in an extremely compact manner, and it is also possible to store an optical fiber connection portion that can easily perform connection switching and branch connection work of an optical fiber cable. The object is to provide a closure with a structure inside .
[0007]
[Means for Solving the Problems]
Closure according to claim 1, a closure comprising a housing structure of the optical fiber connecting portion for housing the optical connecting portion for connecting optical fibers to each other which are drawn from the optical fiber cable therein, the closure Includes a closure sleeve for holding the optical fiber cable at both ends in the length direction, and a storage structure for the optical fiber connection portion disposed in the center of the inside of the closure sleeve. The optical connection unit storage tray includes a plurality of optical connection unit storage trays for storing the fiber connection units and a support member that supports the optical connection unit storage tray so as to be slidable in the front-rear direction. The optical connection unit storage tray has a rectangular flat plate shape. The guide rail portions provided along the opposite side portions are arranged in parallel along the slide direction of the optical connection portion storage tray. And a support member is provided with a plurality of support arms that extend along the slide direction of the optical connection unit storage tray and slidably support the guide rails of the optical connection unit storage tray. And the support arms are arranged in layers above and below so that a gap is formed between the support arms adjacent in the vertical direction, and the optical fibers drawn out from the respective optical fiber cables bypass the sides of the support members. The optical fiber cable is arranged on the storage tray from the side opposite to the side on which the optical fiber cable is held, and the extra length portion of the connected optical fiber is held in the closure sleeve. It is characterized in that it is accommodated between the end opposite to the opposite side and the accommodation structure of the optical fiber connection part .
[0008]
In the storage structure for the optical fiber connection portion of the closure according to claim 1, the optical connection portion is arranged in parallel on the optical connection portion storage tray, and further, the optical connection portion storage tray is arranged in a hierarchy vertically by the support arm. By doing so, the optical connecting portion is three-dimensionally arranged.
[0009]
Further, the optical fiber core wires extending from the optical connection portion held by the optical connection portion holding portion are arranged in the gap between the support arms adjacent in the vertical direction, and these optical fiber core wires move the optical connection portion storage tray. The optical connection portion storage tray is pulled out from the support member without hindering the optical connection portion, and the optical connection portion holding portion of the drawn tray is fully opened.
[0010]
Further closure of claim 1, on both sides of the optical connection portion holding part in storage structure of the optical fiber connecting portion, the optical fiber extending from both ends of the optical connection portion to be housed in the optical connection portion holding portion Each of the core wire holding portions is provided with a holding portion for holding the optical fiber, and the core wire holding portion is formed with an incision portion into which the optical fiber core wire is inserted and held.
[0011]
In the storage structure of the optical fiber connection part of the closure according to claim 1, when the optical connection part is stored in the optical connection part holding part, the optical fiber core wire extending from both ends of the optical connection part is used as the core wire holding part. When inserted into the formed cut portion, the optical fiber core wire is held between the cut portions by the elastic force of the elastic member.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a storage structure for an optical fiber connecting portion according to the present invention will be described in detail with reference to FIGS.
1 and 2 accommodates an MT connector 11 (optical connection portion) that connects optical fiber tapes T (optical fiber core wires) drawn from an optical fiber cable C. For this purpose, it is composed of a plurality of trays (optical connection unit storage trays) 20 for storing the MT connectors 11 and a support rack (support member) 30 for slidably supporting the trays 20 in the front-rear direction.
[0013]
The tray 20 shown in FIG. 3 has a rectangular flat plate shape, and is arranged in parallel along a slide direction parallel to the guide rail portion 21 and a guide rail portion 21 provided along opposite side portions. The optical connection part holding part 22 is provided.
[0014]
The optical connection part holding part 22 is composed of a plurality of wall parts 23 erected in parallel on the tray 20 at equal intervals. The distance between the wall parts 23 is the thickness of the MT connector 11 including the connection clip 11a. The MT connector 11 having a size substantially the same as the direction and connected between the wall portions 23 is accommodated.
[0015]
Further, on both sides of the optical connection unit holding unit 22, a core wire holding unit 24 that holds the optical fiber tapes T at both ends of the MT connector 11 housed in the optical connection unit holding unit 22 is provided. The core wire holding portion 24 is a rubber member disposed on both end sides of the wall portion 23, and the notch portions 24a into which the optical fiber tapes T on both ends of the MT connector 11 are inserted and sandwiched are respectively connected to the optical connecting portions. One is formed on each side of the holding portion 22.
[0016]
The support rack 30 includes a plurality of a pair of support arms 32 and 32 that extend forward from the back plate 31 and support the tray 20 on a back plate 31 that is erected perpendicular to the direction in which the tray 20 is pulled out. Yes.
[0017]
Grooves 32a having a U-shaped cross section are formed along the length direction on the opposite side surfaces of the support arms 32, 32, and the corresponding grooves 32a between the support arms 32, 32 arranged in pairs. The guide rails 21 of the tray 20 are respectively passed through the tray 20 so that the tray 20 is slidable in the length direction of the support arm 32.
[0018]
Further, the pair of support arms 32, 32 are arranged in a vertical direction along the back plate 31, and a gap 33 is formed between the support arms 32 adjacent in the vertical direction. The gap 33 is formed from the front end side of the support arm 32 to the back plate 31. When the support rack 30 is viewed from the side, the back plate 31 and the support arm 32 are arranged in a comb shape. In the gap 33, the optical fiber tapes T at both ends of the MT connector 11 held by the optical connection part holding part 22 are arranged.
[0019]
FIG. 4 shows a closure 100 having an optical fiber connection housing 10 therein. In this closure 100, a housing structure 10 for an optical fiber connection portion is disposed in the center of the closure sleeve 101, and optical fiber tapes T drawn from optical fiber cables C held at both ends of the closure sleeve 101 are connected to each other. The MT connector 11 is accommodated.
[0020]
Here, in the housing structure 10 of the optical fiber connection portion, the housing direction of the MT connector 11 does not coincide with the length direction of the closure sleeve 101, and is disposed obliquely with a slight angle. Further, the optical fiber tape T drawn from the optical fiber cable C once bypasses the side of the support rack 30 and is disposed on the tray 20 from the opposite side surface, and when viewed from above, the optical fiber tape T in the closure sleeve 101 is disposed. The optical fiber tape T is stored so as to draw an S shape.
[0021]
According to the optical fiber connection portion storage structure 10 configured as described above, the MT connector 11 is arranged in parallel on the tray 20, and further, the MT connector 11 is arranged in a hierarchical manner by vertically arranging these trays 20. Since it is arranged in three dimensions, the MT connector 11 can be accommodated at a higher density.
[0022]
Since the optical fiber tapes T at both ends of the MT connector 11 held by the optical connector holding part 22 pass through the gap 33 between the support arms 32 adjacent to each other in the vertical direction, these optical fiber tapes T are placed on the tray. The tray 20 is pulled out from the support rack 30 without obstructing the movement of the tray 20, the pulled-out tray 20 is fully opened, and the MT connector 11 held by the optical connection holding unit 22 can be easily taken out. The connection switching / branching operation can be easily performed.
[0023]
When the MT connector 11 is housed in the optical connector holding part 22, the optical fiber tape T is sandwiched by inserting the optical fiber tapes T at both ends of the MT connector 11 into the notches 24 a formed in the core wire holding part 24. The lateral displacement of the connector 11 can be prevented. In addition, since it is clamped by the elastic force of the rubber material, it is easy to mount the optical fiber tape T, and since the strong clamping force does not work, the optical fiber tape T is not damaged.
[0024]
Further, according to the closure 100, the extra length portion of the optical fiber tape T is routed around the optical fiber connecting portion storage structure 10 and stored in an S shape in the closure 100, so that the tray 20 is pulled out. Sometimes, the optical fiber tape T bends easily, so that the optical fiber tape T is not burdened and the tray 20 can be pulled out smoothly.
[0025]
The optical fiber connection portion storage structure 10 is not limited to a closure, and can be applied to any part where a plurality of optical fiber tapes T are connected.
[0026]
【The invention's effect】
According to the closure of the first aspect, the optical connection portion is arranged in parallel on the optical connection portion storage tray, and the optical connection portion storage tray is arranged in a hierarchy in the vertical direction, so that the optical connection portion is three-dimensional. Therefore, the optical connection part can be accommodated with higher density. In addition, since the optical fiber core wires at both ends of the optical connection portion held on the optical connection portion storage tray pass through the gap between the upper and lower adjacent support arms, the optical fiber core wires are arranged outside. The optical connection unit storage tray is pulled out from the support member without interfering with the movement of the connection unit storage tray. The pulled out optical connection unit storage tray is fully opened, and the optical connection unit can be easily removed to switch the connection of the optical fiber tape. Branch connection work can be easily performed.
[0027]
Further , according to the closure of the first aspect , when the optical connection portion is accommodated in the optical connection portion holding portion, the optical fiber core wires at both ends of the optical connection portion are inserted into the cut portions formed in the core wire holding portion. Since the optical fiber core wire is clamped by the optical fiber, the lateral displacement of the optical connection portion on the optical connection portion storage tray can be prevented. In addition, since it is clamped by the elastic force of the elastic member, it is easy to mount the optical fiber core, and since the strong clamping force does not work, the optical fiber core wire is not damaged.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a housing structure for an optical fiber connecting portion according to the present invention.
FIG. 2 is a side view taken along the line II in FIG.
FIG. 3 is a side view taken along the line III-III in FIG. 1;
FIG. 4 is a plan view showing a closure provided with a housing structure for an optical fiber connection portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Storage structure of optical fiber connection part, 11 ... MT connector, 20 ... Tray, 21 ... Guide rail part, 22 ... Optical connection part holding part, 24 ... Core wire holding part, 24a ... Notch part, 30 ... Support rack, 32 ... support arm, 33 ... gap

Claims (1)

An optical fiber connection housing structure for housing an optical connection portion for connecting optical fiber core wires drawn from an optical fiber cable,
The closure includes a closure sleeve that holds the optical fiber cable at both ends in the length direction, and an optical fiber connection housing structure that is disposed in the center of the closure sleeve,
The optical fiber connection portion storage structure includes a plurality of optical connection portion storage trays for storing optical fiber connection portions, and a support member that supports the optical connection portion storage tray so as to be slidable in the front-rear direction.
The optical connection portion storage tray has a rectangular flat plate shape, guide rail portions provided along opposite side portions, and an optical connection portion arranged in parallel along the sliding direction of the optical connection portion storage tray. A holding part,
The support member includes a plurality of paired support arms that extend along the slide direction of the optical connection unit storage tray and slidably support the guide rail portions of the optical connection unit storage tray, and the support arms are arranged in a vertical direction. A gap is formed between the support arms that are arranged adjacent to each other vertically,
The optical fibers drawn from the respective optical fiber cables bypass the side of the support member, and are arranged on the storage tray from the side opposite to the side where the optical fiber cables are held,
The extra length portion of the connected optical fiber is stored in the closure sleeve between the end opposite to the side where the optical fiber cable is held and the storage structure of the optical fiber connection portion ,
In the optical fiber connecting portion storage structure, the optical fiber connecting portion is provided on both sides of the optical connecting portion holding portion with optical fiber holding portions for holding optical fiber core wires extending from both ends of the optical connecting portion stored in the optical connecting portion holding portion. The core wire holding portion is formed with a notch portion into which an optical fiber core wire is inserted and held in an elastic member .

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