JP2010256507A - Cable storage structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve work efficiency by smoothly and easily drawing out an optical drop cable from a drop closure. <P>SOLUTION: The optical drop cable 12 is stored by winding the optical drop cable 12 in a cross-shape (shape of letter 8) on winding bars 14a, 14b, 14c, 14d so that the optical drop cable 12 crosses at the intermediate part 18 of the winding bars 14b, 14c. Thus, when drawing out the optical drop cable 12, the end part of the downstream side of the stored optical drop cable 12 is pulled outward only, then winding is naturally uncoiled without deforming the coil shape, and the optical drop cable 12 is smoothly drawn out in a simple manner. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cable storage structure for storing, for example, an extra length portion of an optical drop cable in a drop drop closure.

  Conventionally, in FTTH (Fiber To The Home) for wiring an optical fiber to a subscriber's building, for example, in a drop closure for dropping from a multi-core optical fiber cable laid in an aerial space between utility poles, a desired An optical fiber is distributed by connecting to an optical drop cable having a number of cores (for example, one or two cores) (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3). For example, when a utility pole with an optical drop cable is relocated in road maintenance, the optical drop cable is also relocated. If the optical drop cable does not have a surplus length, restretching is necessary, and material costs and construction costs increase. For this reason, when the extra length of the optical drop cable is required when pulling out the optical drop cable from the drop closure, the extra length is arranged below the drop closure for each pulled out optical drop cable.

  However, the optical drop cable is structurally more susceptible to external factors than a normal cable, and is damaged, for example, by scattered objects from strong winds when a typhoon strikes. Moreover, the extra length is different for each optical drop cable, and the beauty is impaired. For this reason, for example, a technique has been proposed in which the extra length portion of the optical drop cable is wound and stored in the drop closure (see, for example, Patent Document 1 and Patent Document 3).

JP-A-7-92332 JP 2005-107014 A JP 2006-195498 A

  However, in the above-described prior art, when the extra length portion of the optical drop cable is pulled out from the drop closure, if the optical drop cable is pulled as it is, the optical drop cable is deformed into an elongated coil shape. For this reason, when unwinding, the optical drop cable must be pulled out while shaping so that it does not twist (so as not to generate “more”), and thus there is a problem that it takes time and effort. Further, if the optical drop cable is accidentally pulled strongly, an excessive force is applied to the optical drop cable in a twisted state (a state where “more” is generated), and the optical drop cable is damaged.

  An object of the present invention is to solve the above-mentioned problems and to provide a cable storage structure that can easily and smoothly pull out an optical drop cable from a drop closure (storage container) and improve work efficiency. .

  In order to solve the above-mentioned problem, the invention of claim 1 is a cable storage structure for storing a cable in a storage container so that the cable can be pulled out, and a first structure for winding the cable around the storage container. And a second winding portion, and the cable is configured such that the forward direction from the upstream side to the downstream side of the cable is the first winding direction. And is wound around the second winding portion so that the forward direction is a second circumferential direction opposite to the first circumferential direction, and along the forward direction, After being wound a single turn around the first winding part, then wound around the second winding part and / or wound around the second winding part a single turn, It is characterized by being wound a single turn around the winding part To have.

  In the invention of claim 1, the cable is wound around the first winding portion so that the forward direction from the upstream side to the downstream side is the first circumferential direction, and the forward direction is the first direction. The second winding is wound around the second winding portion so as to be in the second winding direction opposite to the winding direction, and after being wound a single turn around the first winding portion along the forward direction. After being wound a single turn around the attachment part and / or after being wound a single turn around the second winding part, it is wound around the first winding part.

  Invention of Claim 2 is the cable storage structure of Claim 1, Comprising: Both the said 1st winding part and the said 2nd winding part are folded by the mounting part of the said storage container. It is characterized by being able to be prone.

  The invention of claim 3 is a cable storage structure for retractably storing a cable in a storage container, wherein the storage container is provided with a winding portion for winding the cable, and the winding The portion includes a holding portion that holds the bent portion of the bent cable, and a peripheral portion around which the bent cable is wound, and the cable includes the holding portion that holds the bent portion. It is characterized in that when the winding part rotates while being held by the part, it is doubled and wound around the peripheral part.

  In the invention of claim 3, the cable is doubled and wound around the peripheral portion by rotating the winding portion while the bent portion is held by the holding portion.

  According to a fourth aspect of the present invention, there is provided the cable storage structure according to the first, second, or third aspect, wherein the cable is stored in a plurality of stacked storage containers.

  According to the first aspect of the present invention, the cable is wound around the first winding portion so that the forward direction is the first circulation direction, and the second circulation is opposite to the first circulation direction. Wound around the second winding part so as to be in the direction, and wound around the first winding part along the forward direction, and then wound around the second winding part, or / And after being wound a single turn around the second winding part, it is wound around the first winding part so that the cable can be easily and smoothly pulled out of the storage container, improving the working efficiency. Can be able to.

  According to the invention of claim 2, since both the first winding portion and the second winding portion are provided on the placing portion of the storage container so as to be folded and prone, the smoother and smoother. The cable can be pulled out.

  According to the third aspect of the present invention, the storage container is provided with a winding portion for winding the cable, and the winding portion is bent and secondly held by the holding portion that holds the bent portion of the bent cable. Because the cable is wound around the peripheral portion, the cable is doubled by rotating the winding portion while the bent portion is held by the holding portion. The cable can be easily and smoothly pulled out of the storage container, and the working efficiency can be improved.

  According to the invention of claim 4, since the cables are stored in the plurality of stacked storage containers, the cables can be stored in the storage container in a compact manner regardless of the length of the cables.

It is explanatory drawing for demonstrating the structure of the drop closure by Embodiment 1 of this invention. It is a top view which shows typically the structure of the surplus length storage part of the drop closure. It is the figure which shows typically the structure of the drop closure, Comprising: It is the figure which looked at a mode that the surplus length storage part was open | released from the side. It is the figure which shows typically the structure of the drop closure, Comprising: It is the figure which looked at a mode that the surplus length storage part was open | released from the front side. The It is sectional drawing which shows the structure of a surplus length accommodating part typically. It is sectional drawing for demonstrating the structure and function of a surplus length accommodating part. It is sectional drawing which shows typically the structure of the extra length accommodating part of the drop closure by Embodiment 2 of this invention. It is sectional drawing which shows the structure of a surplus length accommodating part typically. It is a top view which shows typically the structure of the extra length storage part of the drop closure by the modification of Embodiment 1 of this invention. It is a top view which shows typically the structure of the extra length storage part of the drop closure by another modification of Embodiment 1 of this invention. It is sectional drawing which shows the structure of a surplus length accommodating part typically. It is sectional drawing for demonstrating the structure and function of a surplus length accommodating part. It is sectional drawing for demonstrating the structure and function of the extra length accommodating part of the drop closure by another modification of Embodiment 1 of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is an explanatory diagram for explaining a configuration of a drop closure according to Embodiment 1 of the present invention, FIG. 2 is a plan view schematically showing a configuration of an extra length storage portion of the drop closure, and FIG. FIG. 4 is a diagram schematically showing the configuration of the drop closure, and is a diagram showing a state in which the extra length storage portion is opened from the side, and FIG. 4 is a diagram schematically showing the configuration of the drop closure. Fig. 5 is a front view of the state in which the extra length storage unit is opened, Fig. 5 is a cross-sectional view schematically showing the configuration of the extra length storage unit, and Fig. 6 is the configuration of the extra length storage unit. It is sectional drawing for demonstrating a function.

  As shown in FIGS. 1, 3, and 4, the drop closure 1 includes a fusion part 2 and a plurality of tray-like extra length storage parts 3, 4, and 5 that are accommodated in an outer frame body 6. A schematic configuration 9 is formed by being suspended from the overhead wire 8. In the fusion part 2, the optical fiber cable 11 and the optical drop cable 12 are connected at the fusion splicing point 9.

  As shown in FIGS. 2, 3, and 5, the extra length storage unit 3 is attached to the fusion unit 2 so as to be openable and closable via a hinge portion 21 a, and the extra length portion of the optical drop cable 12 is stored therein. The extra length storage units 4 and 5 are used as necessary depending on the extra length of the optical drop cable 12. A plate-shaped winding bar 14a (14b, 14c, 14c, 14c, 14c, 14c, 14c) for winding the optical drop cable 12 so as to be hooked (8-shaped) on the mounting portion (bottom surface portion) of the extra length storage portion 3 14d) and a foldable bar support member 15a (15b, 15c, 15d) having a diamond-shaped cross section for supporting the winding bar 14a (14b, 14c, 14d), respectively, are provided integrally.

  In this embodiment, the optical drop cable 12 is drawn into the extra length storage part 3 from the introduction site fixed by the fixing tool 13a, and is wound around the winding bars 14a and 14b along the forward direction from the upstream side to the downstream side. 2 is wound so as to turn once counterclockwise in FIG. 2, and is bent so that an inflection point is formed at an intermediate portion 18 of the winding bars 14b and 14c, and the winding bars 14c and 14d Is wound so as to make one turn clockwise, and is bent so that an inflection point is formed in the intermediate portion 18 and intersects at the intermediate portion 18, and is fixed by the fixing tool 13b. It arrange | positions on the mounting part of the surplus length storage part 3 so that it may be drawn outside from the extraction | drawer site | part.

  As shown in FIG. 5, by inserting a prismatic fixing member 22a (22b, 22c, 22d) into the bar support member 15a (15b, 15c, 15d), the winding bar 14a (14b, 14c, 14d) is fixed in an upright state, and the optical drop cable 12 can be wound. Further, as shown in FIG. 6, the prismatic fixing member 22a (22b, 22c, 22d) is extracted, the bar support member 15a (15b, 15c, 15d) is folded, and the winding bar 14a (14b, 14c, 14d) is folded. ) Is inverted, and the optical drop cable 12 can be pulled out.

  The optical drop cable 12 drawn into the surplus length storage portion 3 has a predetermined side surface portion of the surplus length storage portion 3 whose upstream end portion and downstream end portion are fixed by fixtures 13a and 13b, respectively. Fixed. Moreover, the optical drop cable 12 is fixed to the mounting part of the extra length storage part 3 using the string-like members 16a, 16b, and 16c at three places including the crossing part, and is prevented from dropping when opened. The surplus length storage portions 4 and 5 have substantially the same configuration as that of the surplus length storage portion 3. The surplus length storage portion 4 is connected to the surplus length storage portion 3 via the hinge portion 21b. The extra length storage part 4 is attached to the extra length storage part 4 via the hinge part 21c so as to be freely opened and closed.

  As shown in FIG. 2, the cable housing structure 17 of this embodiment has a hooked shape (in the shape of figure 8) so that the optical drop cable 12 intersects at the intermediate portion 18 of the winding bars 14b and 14c. ), Wound around the winding bars 14 a, 14 b, 14 c, 14 d and arranged on the mounting portion of the extra length storage portion 3, and is schematically configured. Here, the S-shaped portion of the optical drop cable 12 overlaps at the intermediate portion 18.

  Next, a method for housing the optical drop cable will be described with reference to FIGS. After the fusion, the optical drop cable 12 drawn from the fusion part 2 is drawn into the extra length storage part 3 in an open state as shown in FIGS. Next, the upstream end of the extra length portion of the drawn optical drop cable 12 is fixed using the fixture 13a. Next, as shown in FIG. 5, the fixing member 22a (22b, 22c, 22d) is inserted into the bar support 15a (15b, 15c, 15d), and the winding bar 14a (14b, 14c, 14d) is inserted. Are fixed in an upright state. Next, the optical drop cable 12 is wound around the winding bars 14a, 14b, 14c, and 14d in a hook shape (8-shape) so as to intersect at the intermediate portion 18 of the winding bars 14b and 14c.

  That is, along the forward direction, winding is performed around the winding bars 14a and 14b so as to make one turn counterclockwise in FIG. 2, and an inflection point is formed at the intermediate portion 18 of the winding bars 14b and 14c. The intermediate portion 18 is bent so as to be formed, wound around the winding bars 14c and 14d so as to turn once in a clockwise direction, and an inflection point is formed in the intermediate portion 18. Place them curved so that they intersect.

  Next, the optical drop cable 12 is taken out to the outside, and the downstream end portion of the extra length portion is fixed using the fixture 13b. Next, the optical drop cable 12 is fixed to the placement portion of the extra length storage portion 3 using the string-like members 16a, 16b, and 16c at three places including the intersection of the intermediate portion 18. Next, the extra length storage portions 3, 4, and 5 are closed.

  Next, a method for drawing out the optical drop cable 12 will be described. As shown in FIGS. 3 and 4, the extra length storage portions 3, 4, 5 are opened. Next, as shown in FIG. 6, the fixing members 22a, 22b, 22c, and 22d are pulled out, the bar support members 15a, 15b, 15c, and 15d are folded, and the winding bars 14a, 14b, 14c, and 14d are inverted, Set to prone state. Next, the fixture 13b is removed, the string-like members 16a, 16b, and 16c are removed, and the optical drop cable 12 is pulled out. At this time, the downstream end of the extra length portion of the stored optical drop cable 12 is pulled outward (in a direction away from the center of curvature of the curved portion of the downstream end).

  Thus, according to the configuration of this embodiment, the optical drop cable 12 is hooked in such a manner as to intersect the winding bars 14a, 14b, 14c, 14d at the intermediate portion 18 of the winding bars 14b, 14c ( 8), the winding end can be naturally unwound by simply pulling the downstream end of the stored optical drop cable 12 outward without causing any coil-like deformation. The optical drop cable 12 can be pulled out easily and smoothly. Therefore, anyone can work quickly and work efficiency can be improved. Furthermore, for example, the optical drop cable is not accidentally pulled strongly, and an excessive force is not applied to the optical drop cable in a twisted state (a state where “more” is generated), thereby damaging the optical drop cable. Further, the optical drop cable can be beautifully accommodated in the extra length accommodating portion.

(Embodiment 2)
FIG. 7 is a cross-sectional view schematically showing the configuration of the extra length storage portion of the drop closure according to Embodiment 2 of the present invention, and FIG. 8 is a cross-sectional view schematically showing the configuration of the extra length storage portion. The configuration of this embodiment is greatly different from the configuration of the first embodiment described above. Instead of arranging the optical drop cable in the shape of figure 8, the intermediate portion of the optical drop cable storage portion is bent (curved). ), And it is configured to be wound around the winding portion in a double state.

  As shown in FIGS. 7 and 8, the extra length storage unit 24 of this embodiment is provided with a winding unit 25 for winding the optical drop cable 12. The winding portion 25 is disposed with an S-shaped gap portion (groove portion) 26s therebetween and is generally formed into a substantially cylindrical shape and has arcuate peripheral edges, flange portions 27a and 27b, a rotating shaft, It has the part 28 and the lock pin 29 for stopping rotational movement.

  In this embodiment, in the optical drop cable 12, the intermediate point of the extra length portion is aligned with the intermediate point 26t of the gap portion 26s, and the upstream and downstream portions are fitted into the gap portion 26s to form a cloud shape. The bent portions formed by being bent (curved) by being hung on the portions 26a and 26b are held by, for example, the cloud-shaped portion 26b, and the cloud-shaped portions 26a and 26b are rotated by the rotation of the cloud-shaped portions 26a and 26b. Is wound and arranged along the periphery of the.

  Further, the optical drop cable 12 drawn into the surplus length storage portion 24 has the upstream side end portion and the downstream end portion of the surplus length portion of the predetermined length side portion of the surplus length storage portion 24, respectively, fixed fixtures 31a, It is fixed by 31b. At the time of storage, the rotation is stopped and fixed by the lock pin 29. At the time of drawing, the lock pin 29 is pulled out, and the downstream end of the extra length portion of the optical drop cable 12 is pulled while rotating the cloud portions 26a, 26b in the opposite direction to that of winding.

  According to the configuration of this embodiment, the optical drop cable 12 has an intermediate point of the extra length aligned with the intermediate point 26t of the gap 26s, and its upstream and downstream portions are fitted into the gap 26s. The bent portions formed by being bent and hung on the cloud-shaped portions 26a and 26b are held by the cloud-shaped portion 26b, for example, and in a double state, the cloud-shaped portions 26a and 26b are rotated to rotate the cloud-shaped portions 26a and 26b. Since it is wound along the peripheral edge and stored in the extra length storage section 24, the downstream end portion of the stored optical drop cable 12 is rotated while rotating the cloud-shaped sections 26a and 26b in the direction opposite to that during winding. By simply pulling outward, the winding can be naturally unwound and the optical drop cable 12 can be pulled out easily and smoothly without any coil-like deformation or the like.

  Therefore, anyone can work quickly and work efficiency can be improved. Furthermore, for example, the optical drop cable is not accidentally pulled strongly, and an excessive force is not applied to the optical drop cable in a twisted state (a state where “more” is generated), thereby damaging the optical drop cable. In addition, it can be stored beautifully and compactly.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the gist of the present invention. Is included in the present invention. For example, in the above-described first embodiment, the case where the optical drop cable 12 is fixed using the string-like members 16a, 16b, and 16c to prevent the dropout at the time of opening has been described, but as shown in FIG. Alternatively, guide portions 33a and 33b may be provided in the extra length storage portion 3A to hold the optical drop cable 12.

  Further, as shown in FIG. 10, the optical drop cable 12 is drawn to the back of the extra length storage part 3B and fixed with the fixing tool 13c at the back, and the plate-like winding bars 35a, 35b, 35c, 35d You may make it wind around in the shape of a hook (in the shape of figure 8). Here, the winding bar 35a (35b, 35c, 35d) may be supported by a plate-like bar support member 36a (36b, 36c, 36d) as shown in FIGS.

  As shown in FIG. 12, it is assumed that the winding bars 35a, 35b, 35c, and 35d and the bar support members 36a, 36b, 36c, and 36d can be in the standing state and the prone state. Further, as shown in FIG. 13, recesses 41a and 41b are formed in the placement portion (bottom surface portion) of the extra length storage portion 3C, winding bars 38a, 38b, 38c, and 38d, and bar support members 39a, 39b, 39c and 39d may be stowed in a prone state so that the mounting surface is flattened, and the optical drop cable 12 may be further easily pulled out.

  Further, in the first embodiment, the case where only the first-stage extra length storage unit is used has been described, but the second-stage and third-stage extra-length storage units 4 and 5 may also be used. Further, the extra length storage section may be four or more, or two or less. Further, the optical drop cable arranged in a hanging shape may be folded and stored at an intersection (intermediate location). Further, a plurality of first winding parts and second winding parts may be provided. For example, in the first embodiment, after the optical drop cable is wound around the winding bars 14c and 14d, the winding direction may be counterclockwise and wound around another winding bar pair. Alternatively, a single first winding portion and a second winding portion may be provided, and the optical drop cable may be alternately wound. For example, the surplus length storage part of the first embodiment and the surplus length storage part of the second embodiment may be combined.

  It can be applied not only for aerial use but also for underground use.

1 Drop closure 3, 4, 5, 24, 3A, 3B, 3C Extra length storage (storage container)
12 Optical drop cable (cable)
14a, 14b Winding bar (second winding part)
14c, 14d Winding bar (first winding part)
17 Cable storage structure 25 Winding portions 35a, 35b, 38a, 38b Winding bar (first winding portion)
35c, 35d, 38a, 38b Winding bar (second winding part)

Claims (4)

A cable storage structure for storing a cable in a storage container so that it can be pulled out,
The storage container is provided with a first winding part and a second winding part for winding the cable, and the forward direction of the cable from the upstream side to the downstream side of the cable is first. The second winding is wound around the first winding portion so as to be in the circumferential direction, and the forward direction is a second circumferential direction opposite to the first circumferential direction. And wound around the first winding part along the forward direction and then wound around the second winding part and / or wound around the second winding part. A cable housing structure characterized by being wound a single turn around the first winding part after being wound a single turn around the attaching part.   The said 1st winding part and the said 2nd winding part are provided in the mounting part of the said storage container so that it can be folded and can be prone. Cable storage structure. A cable storage structure for storing a cable in a storage container so that it can be pulled out,
The storage container is provided with a winding portion for winding the cable, and the winding portion is bent and doubled by a holding portion that holds the bent portion of the bent cable. A peripheral portion around which the cable is wound, and the cable is wound around the peripheral portion by being doubled when the winding portion rotates while the bent portion is held by the holding portion. A cable storage structure characterized by that.   The cable storage structure according to claim 1, wherein the cable is stored in a plurality of stacked storage containers.

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