JP2014048495A - Coated optical fiber unit division holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coated optical fiber unit division holder capable of holding a plurality of coated optical fiber units in a closure orderly, and performing work easily by taking out only a specific coated optical fiber unit.SOLUTION: A coated optical fiber unit division holder includes: an annular frame body 13 having a putting in/taking out port 19 of a coated optical fiber unit at one point in a circumferential direction; a rotation body 15 rotatably incorporated into the annular frame body 13, and including a plurality of accommodation recess parts 37 for accommodating a plurality of coated optical fiber units at intervals in the circumferential direction in an outer periphery part; and a lid 17 for sealing the putting in/takin out port 19. By rotating the rotation body 15 in the annular frame body 13 and matching one accommodation recess part selected arbitrarily from among the plurality of accommodation recess parts 37 of the rotation body with the putting in/taking out port 19 of the annular frame body, the coated optical fiber unit can be put in/taken out of the accommodation recess part 37 selected arbitrarily. When the coated optical fiber unit is not put in/taken out, the lid 17 is closed.

Description

  According to the present invention, a plurality of optical fiber core units in which a sheath of an optical cable is stripped and exposed in a closure for branching a drop cable from a built-in optical cable to a subscriber are classified and held for each unit. It relates to a holding tool.

  When dropping a drop cable from a built-in optical cable to a subscriber, peel off the jacket at an appropriate position of the optical cable, install a closure at that position, and install the optical fiber core of the optical cable and the optical fiber of the drop cable inside the closure. Connect the fiber core.

  The optical fiber core of the optical cable is usually divided into a plurality of units and housed in the jacket for easy identification. For example, when using a 4-fiber ribbon as an optical fiber, 5 units of 20 tapes (20 fibers) are combined into one unit, for example, 10 units are assembled into a 200-fiber optical cable. Composed.

  Of the plurality of optical fiber cores of the optical cable, only a part is connected to the drop cable in the closure, and most of the optical fiber cores only pass through the closure. An optical fiber that only passes through the closure is called a passing core. The passing core wire has a surplus length in the closure and is stored in the surplus length storage case (Patent Document 1), and the passing core wire is passed with almost no surplus length and the surplus length storage case is omitted (Patent Document 2). )

  FIG. 9 shows a simple method without an extra length storage case for the passing core wire. In the figure, 1 is an optical cable, 2 is a messenger wire that supports the optical cable 1, 3 is a plurality of optical fiber core units exposed by stripping the outer sheath of the optical cable, and 4 is an exposed portion of the optical fiber core unit 3. The closure 5 is a drop cable, and 6 is an optical fiber core of the drop cable 5.

  Most of the plurality of optical fiber core units 3 of the optical cable 1 are the passing core wires 3a that pass through the closure 4 without being cut, but some optical fiber core units (or some optical fibers). Some of the optical fiber units are cut in the closure 4 and branched from the passing optical fiber 3a to become a branched optical fiber 3b. The branch core wire 3 b is connected to the optical fiber core wire 6 of the drop cable 5. Reference numeral 7 denotes the connecting portion. The passing core wire 3a is bundled by the focusing component 8, and is collectively supported by the messenger wire 2.

  The operation of connecting the drop cable to the optical cable is performed as follows. First, the closure is opened, the focusing of the passing core 3a by the focusing component 8 is released, a specific optical fiber core unit is selected from the passing core 3a, and a specific tape core is selected from the optical fiber core unit. A wire is selected, and a specific single core wire (or the tape core wire) of the tape core wires is cut and separated, and connected to the optical fiber core wire of the drop cable. Since this operation is performed every time a new subscriber is generated, it is required that the operation be performed as efficiently as possible.

JP 2004-354536 A JP 2003-203427 A

Conventionally, in a closure, a plurality of optical fiber core units are bundled together with a converging component, so if the focusing by the converging component is released, the plurality of optical fiber core units will fall apart and drop cables The problem is that it is troublesome to select a specific unit including the optical fiber core wire to be connected, and when the selected unit is separated and connected, the other units become obstructive and workability is poor. was there.
In particular, since the optical fiber cores are stored in the closure at a high density, it is difficult to identify the optical fiber core wires.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an optical fiber core unit separating holder that can hold a plurality of optical fiber core units orderly in a closure and can easily take out a specific optical fiber core unit. There is to do.

An optical fiber core unit separating holder according to the present invention is:
An annular frame having a slot for an optical fiber core unit at one place in the circumferential direction, and incorporated in the annular frame so as to be guided by its inner peripheral surface so that it can be rotated. A rotating body provided with a plurality of storage recesses for storing the wire unit at intervals in the circumferential direction,
By rotating the rotating body within the annular frame and aligning one storage recess arbitrarily selected from the plurality of storage recesses of the rotary body with the entrance / exit of the annular frame, an optical fiber is placed in the arbitrarily selected storage recess. It is characterized in that the core unit can be taken in and out.

  In the optical fiber core line unit sorting holder according to the present invention, it is preferable that an attachment portion for attaching the annular frame body to the fixing member protrudes from the outer peripheral surface of the annular frame body.

  Moreover, it is preferable that the optical fiber core wire unit sorting holder according to the present invention is attached to the annular frame so that a lid that closes the slot of the optical fiber core unit can be opened and closed.

  In addition, the optical fiber core unit separating holder according to the present invention rotates on the inner peripheral surface of the annular frame and the outer peripheral surface of the rotating body at a position where each storage recess of the rotating body coincides with the entrance / exit of the annular frame. It is preferable that a positioning portion for temporarily stopping the rotation of the body is formed.

  Moreover, it is preferable that the knob for rotating a rotary body is protrudingly provided in the end surface of one or both of the rotary body with the optical fiber core line unit division holder which concerns on this invention.

  In the optical fiber core wire unit sorting holder according to the present invention, it is preferable that a stopper for restricting the rotation angle of the rotating body to less than 360 ° is formed on the annular frame body and the rotating body.

  Further, in the optical fiber core unit sorting holder according to the present invention, the stopper on the annular frame side protrudes from the end surface on the same side as the knob of the rotating body, and a part of the knob of the rotating body also serves as the stopper on the rotating body side. It is preferable.

  Moreover, the optical fiber core unit sorting holder according to the present invention is formed with a pop-out preventing piece for preventing the optical fiber core unit housed in the housing recess from popping out at the opening of each housing recess of the rotating body. Preferably it is.

  When the optical fiber core unit sorting holder according to the present invention is used, an optical fiber core unit is placed in the housing recess by rotating the rotating body and aligning the arbitrarily selected housing recess with the slot of the annular frame. By repeating this, a plurality of optical fiber core units can be individually stored in a plurality of storage recesses. That is, a large number of optical fiber cores can be accommodated in order according to the order of the optical fiber cores. If the cover is put on the inlet / outlet or the housing recess is not in alignment with the inlet / outlet, the optical fiber core unit will not escape from the housing recess. It is possible to keep it neatly in a state of being divided for each unit along the outer periphery of the.

In addition, when a specific optical fiber core unit needs to be taken out of the annular frame due to a drop cable connection or the like, a storage recess that stores the optical fiber core unit by rotating the rotating body is an annular frame. The optical fiber core unit can be easily taken out without being obstructed by other optical fiber core units. This means that since the optical fiber core wires are stored in order, the core wires can be pulled out without crossing when the core wires are pulled down, and a large number of core wire pulling operations can be secured. The taken-out optical fiber core unit can be returned to the original housing recess again after a predetermined operation.
Moreover, since it is a rotating structure, the operator can perform work by placing an arbitrary work core wire at a position where the work is easy to work, so that workability can be improved.

  In addition, if the mounting part protrudes from the outer peripheral surface of the annular frame, the annular frame can be easily attached to a fixing member such as a messenger wire or a skeleton of a closure, and the sorting holder is an optical fiber core unit. It is possible to maintain a posture that facilitates loading and unloading work.

  In addition, a positioning portion for temporarily stopping the rotation of the rotating body should be formed on the inner peripheral surface of the annular frame and the outer peripheral surface of the rotating body when the respective storage recesses of the rotating body coincide with the entrance / exit of the annular frame. The housing concave portion of the rotating body can be surely aligned with the insertion / extraction port of the annular frame, and the operation of inserting / removing the optical fiber core unit can be performed easily.

  In addition, if a knob is formed on the end face of the rotating body, the work of rotating the rotating body can be easily performed.

  In addition, if a stopper that restricts the rotation angle of the rotating body to less than 360 ° is formed on the annular frame and the rotating body, it is possible to prevent the optical fiber core unit from being twisted due to excessive rotation of the rotating body. Damage to the optical fiber core unit can be prevented.

  Further, if the knob of the rotating body also serves as a stopper on the rotating body side, the structure can be simplified.

  In addition, if an optical fiber core unit pop-out prevention piece is formed at the opening of each storage recess of the rotating body, the optical fiber core unit can be used when the storage recess is aligned with the slot of the annular frame. You can prevent it from popping out carelessly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of an optical fiber core unit separating holder according to the present invention, (A) is a perspective view, (B) is a front view, (C) is a plan view, and (D) is a right side view. The perspective view which decomposes | disassembles and shows the optical fiber core line unit division holder of FIG. 1 shows an annular frame that is one part of the optical fiber core unit partitioning holder of FIG. 1, (A) is a perspective view, (B) is a front view, (C) is a plan view, (D) is a bottom view, (E) is a right side view, and (F) is a left side view. 1 shows a rotating body that is one part of the optical fiber core unit sorting holder in FIG. 1, (A) is a perspective view, (B) is a front view, (C) is a plan view, (D) is a bottom view, E) is a right side view, (F) is a left side view, and (G) is a cross-sectional view taken along line GG in (B). 1A and 1B show a lid which is a part of the optical fiber core unit sorting holder of FIG. 1, (A) is a perspective view, (B) is a front view, (C) is a plan view, (D) is a bottom view, (E ) Is a right side view, and (F) is a left side view. FIG. 2A is a perspective view and FIG. 2B is a front view showing a state in which the lid of the optical fiber core wire unit sorting holder of FIG. 1 is opened. The optical fiber core unit separation holder of FIG. 1 shows the state where the optical fiber core unit is separated and held, (A) is a front view, and (B) is a right side view. Explanatory drawing which shows the use condition of the optical fiber core line unit division holder of FIG. Explanatory drawing which shows the conventional structure which connects the optical fiber core wire of an optical cable and the optical fiber core wire of a drop cable in a closure.

  1 and 2 show an embodiment of an optical fiber core unit separating holder according to the present invention. The sorting holder 11 includes an annular frame 13, a rotating body 15, and a lid 17. Each part is a plastic molding.

  First, the structure of the annular frame 13 will be described with reference to FIG. The annular frame 13 is missing one place in the circumferential direction, and this portion serves as an entrance / exit 19 for the optical fiber core unit. A mounting portion 21 protrudes from the outer peripheral surface of the annular frame 13. The attachment portion 21 is a portion for attaching the annular frame 13 to a fixing member (a messenger wire, a frame of the closure, etc.) in the closure. The attachment portion 21 includes an arm portion 21a that protrudes from the outer peripheral surface of the annular frame 13, and a pressing portion 21b that is integrally formed at the tip of the arm portion 21a and that is against the fixing member. A hole 21c is formed in the arm portion 21a. The hole 21c is a portion through which a binding band (trade name tie wrap, insulation lock or the like) for attaching the attachment portion 21 to the fixing member is passed.

  A guide rail 23 that guides the rotating body 15 in the rotation direction is projected from a central portion in the width direction (axial direction) of the inner peripheral surface of the annular frame 13. Further, on both sides of the guide rail 23 on the inner peripheral surface of the annular frame 13, positioning grooves 25 for temporarily stopping the rotation of the rotating body 15 at a predetermined angular interval (the same angular interval as a storage recess of the rotating body 15 described later). Is formed.

  A hinge shaft 27 that rotatably supports the base end of the lid 17 is formed on one side of the loading / unloading port 19 of the annular frame 13, and an opening / closing end of the lid 17 is disposed on the opposite side of the loading / unloading port 19. A locking piece 29 for temporarily fixing is formed in the axial direction. Further, a stopper 31 for restricting the rotation angle of the rotating body 15 is provided on one end face of the annular frame 13 so as to project.

  Next, the configuration of the rotating body 15 will be described with reference to FIG. The rotating body 15 has a body portion 33 whose outer diameter is smaller than the inner diameter of the annular frame body 13, and radially on both sides in the axial direction of the outer peripheral surface of the body portion 33 (parts excluding the central portion in the axial direction). A partition wall 35 is formed. A space between the partition walls 35 adjacent to each other in the circumferential direction is a storage recess 37 for storing the optical fiber core unit. The rotating body 15 is formed with storage recesses 37 in a half circumference on one side at a predetermined angular interval and 5 compartments on the other half circumference at the same angular interval, for a total of 10 compartments. Can be stored at intervals in the circumferential direction.

  A protruding prevention piece 39 is formed in the counterclockwise direction at the tip of the partition wall 35 on one side in the axial direction, and a protruding prevention piece 39 is formed in the clockwise direction at the tip of the partition wall 35 on the opposite side in the axial direction. ing. That is, the protruding prevention pieces 39 are alternately formed at the ends of the partition walls 35 on both sides in the axial direction. The outer diameter of the rotating body 15 (the diameter of the circumscribed circle of the pop-out prevention piece 35) is set to be substantially the same as the inner diameter of the inner peripheral surface of the annular frame 13 excluding the guide rail 23 (the part where the positioning groove 25 is formed). Has been.

  The inner diameter of the guide rail 23 of the annular frame 13 is set to be slightly smaller than the outer diameter of the rotating body 15 (the diameter of the circumscribed circle of the pop-out prevention piece 35), but the annular frame 13 is put in and out at one place in the circumferential direction. Since the opening 19 is provided, the rotating body 15 can be incorporated into the annular frame 13 by elastically deforming the loading / unloading opening 19 in an expanding direction and increasing the inner diameter of the annular frame 13. When the rotating body 15 is assembled in the annular frame 13, the annular frame 13 returns to the inner diameter before elastic deformation, and the guide rails 23 of the annular frame 13 are formed on the protruding prevention pieces 39 on both sides in the axial direction of the rotating body 13. Since it falls in between, the rotator 13 can rotate in a state where movement in the axial direction is prevented in the annular frame 13.

  A pair of knobs 41 </ b> A and 41 </ b> B for projecting the rotating body 15 within the annular frame 13 are projected from one end surface of the rotating body 15. The knobs 41A and 41B avoid the storage recess 37 so as not to interfere with the storage of the optical fiber core unit in the storage recess 37, and the storage recess 37 of the half circumference on one side and the five sections of the other half circumference. Are formed at intervals of 180 °.

  In this embodiment, the knobs 41 </ b> A and 41 </ b> B of the rotating body 15 are formed on the end surface on the same side as the stopper 31 of the annular frame 13, and when the rotating body 15 is rotated in the annular frame 13, The knob 41A is formed so as to abut against the stopper 31 of the annular frame 13, and the other knob 41B is formed so as not to abut against the stopper 31 of the annular frame 13. That is, a part of one knob 41A serves as a stopper 43 on the rotating body 15 side. For this reason, the rotating body 15 has a range (360 °) from a position where a part (stopper) 43 of the knob 41A hits one side in the circumferential direction of the stopper 31 of the annular frame 13 to a position hitting the opposite side in the circumferential direction. It is possible to rotate within a range of less than the upper limit, and it is restricted so that it cannot rotate beyond that. This is to prevent excessive twisting of the optical fiber core unit.

  A positioning projection 45 that falls into the positioning groove 25 of the annular frame 13 is formed on the outer peripheral surface of the rotating body 15.

  Next, the configuration of the lid 17 will be described with reference to FIG. The lid 17 is a curved member formed so as to close the entrance / exit 19 of the annular frame 14 from the outside. A bearing portion 47 that is rotatably attached to the hinge shaft 27 of the annular frame 13 is formed on one end side of the lid 17, and is detachably attached to the locking piece 29 of the annular frame 13 on the other end side. A hook portion 49 is formed.

  FIG. 6 shows a state in which the bearing portion 47 of the lid 17 is attached to the hinge shaft 27 of the annular frame 13 and the lid 17 is opened. The lid 17 is rotatable about the hinge shaft 27. When the lid 17 is closed, the slot 19 of the annular frame 13 is closed by the lid 17 as shown in FIG.

  The optical fiber core wire unit partitioning holder 11 shown in FIG. 1 is obtained by incorporating a rotating body 15 and attaching a lid 17 to the annular frame 13 configured as described above. When the rotating body 15 is rotated in the annular frame 13, the positioning protrusion 45 on the outer peripheral surface of the rotating body 15 falls into the positioning groove 25 on the inner peripheral surface of the annular frame 13 or escapes from the positioning groove 25. Therefore, the annular frame 13 is elastically deformed in the direction of diameter expansion / contraction (the inlet / outlet 19 is expanded or narrowed). For this reason, every time the positioning protrusion 45 falls into the positioning groove 25, a clicking sound is made, and the rotating body 15 is temporarily fixed at that position.

  The positioning grooves 25 of the annular frame 13 are formed at the same angular intervals as the accommodating recesses 37 of the rotating body 15, and any of the accommodating recesses 37 of the rotating body 15 coincides with the entrance / exit 19 of the annular frame 13. The positioning protrusion 45 falls into any one of the positioning grooves 25. For this reason, the rotating body 15 can be temporarily fixed when any of the storage recesses 37 coincides with the access port 19 of the annular frame 13. Accordingly, if any of the storage recesses 37 of the rotating body 15 is aligned with the insertion / exit opening 19 of the annular frame 13 and the lid 17 is opened, the optical fiber core unit can be inserted into or removed from the storage recess 37.

  FIG. 7 shows a state where one optical fiber core unit 3 is housed in each housing recess 37 of the rotating body 15 as described above. One optical fiber core unit 3 is formed by stacking, for example, five four-core tape cores. In this way, since the plurality of optical fiber core units 3 can be sorted and held in a predetermined order, when a drop cable is connected, an operation of selecting a specific optical fiber core unit is easily performed. be able to.

  FIG. 8 shows a state in which the plurality of optical fiber core units 3 of the optical cable 1 are separated and held in the closure 4 using the optical fiber core unit separating holder 11 described above. In FIG. 8, the same parts as those in FIG. 9 are denoted by the same reference numerals.

  The sorting holder 11 is attached to the messenger wire 2 by attaching the attachment portion 21 of the annular frame 13 with a binding band (not shown). A plurality of optical fiber core units 3 are neatly held by the sorting holder 11 in a state of being sorted as shown in FIG. In such a state, when connecting the drop cable 5, the rotating body should be rotated so that the specific storage recess coincides with the entrance / exit of the annular frame and the lid cable is opened to connect the drop cable 5. A specific optical fiber core unit can be easily taken out. Since the other optical fiber core unit that is not connected to the drop cable is held by the sorting holder 11, the connection operation with the drop cable is easily and efficiently performed without being disturbed by the other optical fiber unit. be able to. After the drop cable 5 is connected, the optical fiber core unit can be returned to the original storage recess and stored. Further, since the rotation range of the rotator is restricted to less than 360 ° by the stopper, there is no possibility that the optical fiber core unit 3 is excessively twisted by the rotation of the rotator.

1: Optical cable 2: Messenger wire 3: Optical fiber core unit 4: Closure 5: Drop cable 6: Optical fiber core wire of drop cable 7: Optical fiber core wire connection part 11: Optical fiber core unit partition holder 13: Annular frame 15: Rotating body 17: Lid 19: Entrance / exit 21: Mounting portion 23: Guide rail 25: Positioning groove 27: Hinge shaft 29: Locking piece 31: Stopper 33 on the annular frame side: Body 35: Partition wall 37: Storage recess 39: Pop-out preventing piece 41A / 41B: Knob 43: Stopper 45 on the rotating body side: Positioning protrusion 47: Bearing portion 49: Hook portion

Claims (8)

An annular frame having a slot for an optical fiber core unit at one place in the circumferential direction, and incorporated in the annular frame so as to be guided by its inner peripheral surface so that it can be rotated. A rotating body provided with a plurality of storage recesses for storing the wire unit at intervals in the circumferential direction,
By rotating the rotating body within the annular frame and aligning one storage recess arbitrarily selected from the plurality of storage recesses of the rotary body with the entrance / exit of the annular frame, an optical fiber is placed in the arbitrarily selected storage recess. An optical fiber core unit separating holder characterized in that the core unit can be taken in and out.   2. An optical fiber core unit separating holder according to claim 1, wherein an attaching portion for attaching the annular frame to the fixing member is provided on the outer peripheral surface of the annular frame.   The optical fiber core unit separation holder according to claim 1 or 2, wherein a lid for closing the slot of the optical fiber core unit is attached to the annular frame so as to be openable and closable.   On the inner peripheral surface of the annular frame and the outer peripheral surface of the rotating body, there are formed positioning portions for temporarily stopping the rotation of the rotating body at positions where the respective storage recesses of the rotating body coincide with the entrance / exit of the annular frame. The optical fiber core unit separating holder according to any one of claims 1 to 3.   The optical fiber core unit separating holder according to any one of claims 1 to 4, wherein a knob for rotating the rotating body protrudes from one or both end faces of the rotating body.   6. The optical fiber core unit separating holder according to claim 1, wherein a stopper for restricting a rotation angle of the rotating body to less than 360 ° is formed on the annular frame body and the rotating body.   7. The optical fiber core wire according to claim 6, wherein a stopper on the annular frame side projects from an end face on the same side as the knob of the rotating body, and a part of the knob of the rotating body also serves as a stopper on the rotating body side. Unit separation holder.   8. A pop-out preventing piece for preventing the optical fiber core unit housed in the housing recess from popping out is formed at the opening of each housing recess of the rotating body. Optical fiber core unit separator holder.

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