• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The box comprises a tubular casing (10) with an open end (10b) and a closed end (10a) provided with an input opening (11) for an optical distribution cable (100), a cover (20) that can be fastened against the open end (10b) of the casing (10) and traversed by output adapters (30), and an optical-fibre-receiving tray (40) that is inside the tubular casing (10) and that has a first end (41) carrying a tubular bush (50) that has a base portion (51) seated against the closed end (10a) of the tubular casing (10) and a body portion (52) projecting outside the input opening (11) to cooperate with a traction device (60) that keeps the tubular bush (50) under pressure and sealed against the closed end (10a) of the tubular casing (10). The tubular bush (50) receives and sealingly holds an end portion (100a) of an optical distribution cable (100) containing at least one optical fibre (FO).
    公开号:ES2718582A2
    申请号:ES201990047
    申请日:2017-12-08
    公开日:2019-07-02
    发明作者:Stancyk Anderson Marcelo；Kinoshita Yoshizawa Wilherm Toshio；Pasetti Gabriel Tanner
    申请人:Furukawa Ind S A Produtos Eletricos；
    IPC主号:
    专利说明:

    [0001]
    [0002] Optical termination box
    [0003]
    [0004] Field of the Invention
    [0005] The present invention relates to a sealed optical termination box, comprising a housing provided with an input opening, for receiving and retaining an optical distribution cable formed by one or more optical fibers, and an output opening to be closed. by a sealed cover provided with multiple output adapters, each of which has an internal end connectable to a respective fiber or fiber division of the optical distribution cable and an external end adapted to receive the connector of a respective optical terminal cable of a user ("distribution cable").
    [0006] State of the art
    [0007] Several constructions of optical termination boxes with multiple outputs are known for the connection of multiple user terminal optical cables from an optical distribution cable that will be received in said boxes.
    [0008] In these known constructions, the single optical fiber or each of the multiple optical fibers of the optical distribution cable, received by the optical termination box, is connected to a respective output adapter, mounted on a box cover, by means of of fiber optic extensions of the distribution cable itself or by means of divisions ("splitters") of a single fiber optic defining the distribution cable when it is, for example, of the low friction type.
    [0009] The connection between the fiber or the fibers of the optical distribution cable with the output adapters of the enclosure lid is made by the field installer operator, at the installation site of the optical termination box.
    [0010] The manual operations of receiving and retaining the optical distribution cable in the termination box, separating the different optical fibers from the cable or dividing them into multiple extensions of optical fibers (splitters), housing these extensions of separate optical fibers or divided into an internal tray of the box and connection of said fiber extensions at the inner ends of the outlet adapters of the box closing lid, are conventionally performed by the installer operator at the place of assembly of said boxes, which results in extremely laborious operations, which carry a lot time and that are susceptible to a high rate of human errors in its assembly.
    [0011] In addition, these known optical termination boxes do not have a hermetically sealed construction in a definitive manner, which guarantees the protection of optical splices and fusions, particularly because their construction characteristics require that the adaptation of the distribution cable and the connection of its or Its optical fibers to the respective output adapters are carried out in the field, before the final and final closure of the case lid.
    [0012] The aforementioned drawbacks related to the assembly difficulties of the known termination boxes occur even in the termination boxes that have an internal tray, which houses fiber optic extensions in the form of "tights" or naked, located in the closure lid to allow the accommodation of said fiber extensions to be carried out before the cover-tray assembly is moved into the housing of the box when it is closed. Optical termination boxes having these characteristics can be found, for example, in US8,422,846B2 and JP08-234025.
    [0013] Summary
    [0014] Depending on the limitations and drawbacks of known termination boxes, the present invention aims to provide a box of the type considered here, which has a sealed and definitive sealed construction, which allows the termination box to receive optical cables the distribution of multiple fibers or of low friction ("low friction") with a single fiber and that prevents the loosening of the optical distribution cable and the movement of accommodation of the internal elements of the extension or of the fiber optic extensions inside the housing of the termination box, preventing the movement of the optical components by vibrations or impacts.
    [0015] The optical termination box proposed by the present invention is of the type comprising: a tubular housing having a closed end provided with an inlet opening for an optical distribution cable; a fixed cover against an open end of the housing that is crossed by outlet adapters; and a fiber optic housing tray, located inside the tubular housing, which has a first end seated against the closed end of the tubular housing and a second end mounted on the lid.
    [0016] According to the invention, the tray carries a tubular bushing that has a base portion seated against the closed end of the tubular housing, and a body portion that projects out of the inlet opening and cooperates with a device for traction that holds the base portion of the tubular bushing pressed tightly against the closed end of the tubular housing. The tubular bushing receives and tightly retains a terminal portion of an optical distribution cable that contains at least one optical fiber.
    [0017] Brief description of the drawings
    [0018] The invention will be described below with reference to the accompanying drawings, which are illustrative only and in which:
    [0019] Figure 1 represents an exploded perspective view of a first configuration of the optical termination box in question which receives an optical distribution cable comprising multiple optical fibers;
    [0020] Figure 2 represents a partial section of a perspective view of a part of Figure 1, to illustrate the axial anchoring of the optical distribution cable in the housing tray assembly;
    [0021] Figure 3 represents an enlarged longitudinal sectional view of the region of the closed end of the tubular housing of the optical termination box of Figures 1 and 2, in the assembled condition;
    [0022] Figures 3A and 3B represent enlarged details of the portion of Figure 3 in which the tensile elements of the optical cable are locked;
    [0023] Figure 4 represents an exploded perspective view of a second configuration of the optical termination box in question, which receives a low friction type optical distribution cable with a single optical fiber;
    [0024] Figure 4A represents an enlarged detail of the part of Figure 4 in which the tensile elements of the optical cable are locked;
    [0025] Figure 5 represents a partial section of a perspective view of a part of Figure 4, illustrating the axial anchoring of the low friction type optical distribution cable in the tray-housing assembly;
    [0026] Figure 6 represents an enlarged longitudinal sectional view of the region of the closed end of the tubular housing of the optical termination box of Figures 4 and 5, in the assembled condition;
    [0027] Figure 7 represents an exploded perspective view of a third configuration of the optical termination box in question, for receiving a low friction type optical distribution cable with a single optical fiber already previously connected;
    [0028] Figure 8 represents a view, in enlarged longitudinal section, of the region of the closed end of the tubular housing of the optical termination box of Figure 7, with an input adapter in the assembled condition;
    [0029] Figure 8A depicts a single fiber optic optical cable, generally of the low friction type, with a terminal portion defined by a connector that will be coupled to the input adapter illustrated in Figures 7 and 8;
    [0030] Figure 9 represents a perspective view of the lid on its external side, showing the mounting of caps in the through holes of the lid which also has a through hole for adaptation of a check valve to pressurize the sealed box;
    [0031] Figure 10 represents a perspective view of the cover on its external side, illustrating the assembly of the multiple adapters and a pressurizing valve through the through holes and through hole provided in the cover;
    [0032] Figures 11 and 12 represent sectional views of the covers illustrated in Figures 9 and 10, respectively;
    [0033] Figures 13 and 14 represent external and internal perspective views of the cover that already has the outlet adapters and the pressurizing valve and where the output adapters each receive the connector previously adapted to the end of an optical cable and the connection of an internal fiber optic extension to the box adapted to the internal end of an output adapter is also shown;
    [0034] Figures 15 and 16 represent perspective views, similar to those of Figures 13 and 14, but showing another model of output adapter; Y
    [0035] Figure 17 depicts a perspective view of the nut and the adjacent portion of the tubular bushing body, illustrating the coupling means for locking the nut.
    [0036] Description
    [0037] In accordance with the aforementioned and as illustrated in the accompanying drawings, the invention relates to a hermetic optical termination box, which has a tubular housing 10, generically trunk-conical that is made of any suitable material, such as polypropylene with 30% fiberglass in its composition, or another polymer suitable for installation, and has a closed end 10a, generally of smaller cross section, and an open end 10b, opposite the first and having a larger cross section.
    [0038] The tubular housing 10 has its closed end 10a provided with an inlet opening 11 to receive an optical distribution cable 100, which can be a multi-fiber cable 101, formed by multiple optical fibers that will be separated into respective fiber extensions (not illustrated), generally provided with an acrylate sheath and housed inside the tubular casing 10, such as in figures 1, 2 and 3 of the attached drawings or it can be a low friction cable 102 , as shown in Figures 4 to 6, which has a single optical fiber, which will be divided into multiple "splitters" of bare fiber (not illustrated), to be housed inside the tubular housing 10, as described later.
    [0039] The optical termination box comprises a lid 20, which is made of any suitable polymer and which has an outer side 20a and an inner side 20b that can be fixed against the open end 10b of the tubular housing 10. The cover 20 is pierced through its through holes 20c (Figure 11), by outlet adapters 30 each having an external end 31 and an internal end to connect to the optical distribution cable 100, that is, to a respective "bare fiber splitter" (not shown), divided from a single low friction optical fiber ("low friction") 102, or an EFO optical fiber extension (see figures 13, 14, 15 and 16) defined by one of the multiple fibers of a multi-fiber optical cable 101. The outer end 32 of each output adapter 30 is adapted to receive a respective connector C of a user's optical COT terminal optical cable ( "cable drop" - see figures 13, 14 and 15).
    [0040] In the construction proposed by the invention, the cover 20 has, on its inner side, a peripheral skirt 21 to be mounted telescopically and sealed and sealed, on a peripheral portion of the open end 10b of the tubular housing 10, and each outlet adapter 30, which can have any suitable construction, known or not known in the state of the art, tightly transfers a respective through hole 20c of the cover 20. Thus, when the cover 20 is sealed over the open end 10b of the tubular housing 10, this open end 10b becomes completely sealed by the cover 20, which can no longer be removed from the tubular housing 10. The sealing of the cover 20 can be carried out in different ways, using adhesives and / or welding. As described below, the tubular casing 10 is designed to operate completely tightly after mounting the terminal portion 100a of the optical distribution cable 100 to the tubular casing 10 and closing the lid 20. Therefore, the tubular housing 10 with its inlet opening 11 and its open end 10b already tightly closed, may be pressurized with a suitable gas, which will be introduced inside the tubular housing 10 through a check valve 25 mounted through a hole through 20d so that it goes through the cover 20, as shown in figures 9 and 10.
    [0041] The optical termination box further comprises a tray 40 for housing bare optical fibers or in EFO fiber optic extensions, which is generally constructed in non-electrically conductive plastic material and is housed inside the tubular housing 10 when it is fixed to the cover 20. The tray 40 has a first end 41 that sits internally against the closed end 10a of the tubular housing 10, and a second end 42 mounted internally to the lid 20, that is, to the inner side 20b thereof, to be displaced therewith when sealing the lid 20 is performed on the open end 10b of the tubular housing 10.
    [0042] The tray 40 may have different constructions suitable for the accommodation of extensions of EFO optical fibers or of "splitters" bare fibers, the second end 42 of the tray 40 being configured to be fitted and held against the inner side 20b of the lid 20 , to be displaced with the latter, when the open end 10b of the tubular housing 10 is sealed.
    [0043] According to a first aspect of the invention, the first end 41, of the tray 40, has a tubular bushing 50, also made of plastic material and having a base portion 51 that will be seated, inside the tubular housing 10, against the closed end 10a thereof, and a body portion 52 projecting out of the inlet opening 11 and cooperating externally with a traction device 60, which is operatively associated with the closed end 10a of the tubular housing 10 to axially press the base portion 51 of the tubular bushing 50 tightly against the closed end 10a of the tubular housing 10.
    [0044] As best seen in Figures 3, 6 and 8, the tubular bushing 50 receives and retains, directly or indirectly, in its interior and in a sealed manner, a terminal portion 100a of the distribution optical cable 100 containing at least one optical fiber .
    [0045] Figures 3, 6 and 8 illustrate a preferred construction and according to which the closed end 10a of the tubular housing 10 has, around the inlet opening 11, an inner annular stop 13, oriented towards the inside of the housing tubular 10 and an outer annular stop 14 turned outward. On the other hand, the base portion 51 of the tubular bushing 50 is externally provided with a peripheral flange 53 to be pressed by the traction device 60 and tightly against the inner annular stop 13 of the tubular housing 10 the traction device 60 being seated against the outer annular stop 14 of the tubular housing 10.
    [0046] The construction described above allows the traction device 60, which cooperates with the body portion 52 of the tubular bushing 50, to be actuated against the outer annular stop 14 of the tubular housing 10, performing an axial traction of the tubular bushing 50 outwards and forcing the peripheral flange 53 of the latter against the inner annular stop 13 of the tubular housing 10. Between the peripheral flange 53 and the inner annular stop 13 there is provided at least one seal gasket 54, generally an "O" ring of elastomeric material to ensure a total and secure tightness between the tubular bushing 50 and the closed end 10a of the tubular housing 10.
    [0047] In the illustrated construction, the body portion 52 of the tubular bushing 50 is provided with an external thread 55 and the pulling device 60 is defined by a nut 61 which cooperates with the external thread 55 of the body portion 52 and sits against the outer annular stop 14 of the closed end 10a of the tubular housing 10. The adjustment of the nut 61 presses the peripheral flange 53 against the inner annular stop 13, compressing the seal gasket 54 and ensuring the tightness of the tubular bushing joint 50 - tubular housing 10. As best illustrated in Figure 17, the body portion 52 of the tubular bushing 50 incorporates at least one locking means 57, and the nut 61 is provided with at least one locking receiver means 67 for be hooked with the locking means 57 so as to block the nut 61 so that it does not unscrew after reaching a final traction position of the tubular bushing 50. Whereby, after the final fixation of the tubular bushing r 50 by adjusting nut 61, the latter can no longer be released, and the tubular bushing is permanently fixed to the tubular housing 10.
    [0048] In the illustrated construction, the locking means 57 takes the form of an external projection 57a incorporated into the body portion 52 of the tubular bushing 50, near the base portion 51, but outside the tubular housing 10, the blocking receiving means 67 defined by an element 67a that engages with the projection 57a, which locks the nut 61 in its final tensile position of the tubular bushing 50.
    [0049] In the constructions illustrated in Figures 1 to 3 and 4 to 6, the body portion 52 of the tubular bushing 50 has a tubular extension 70 inside which the terminal portion 100a of the optical distribution cable 100 is housed, which is held so airtight, hermetically closing the inlet opening 11. In the two embodiments exemplified in Figures 1 to 3 and 4 to 6, the tubular extension 70 of the tubular bushing 50 is defined by means of a heat shrinkable tube 71 that envelops an extension of the optical end of distribution 100, which has at least one optical fiber FO and at least two tensile elements ET, and whose terminal portion 100a penetrates inside the tubular housing 10 through the interior of the tubular bushing 50, said tensile elements being ET fixed, at least partially, to a retaining means 80 of the base portion 51 of the tubular bushing 50.
    [0050] The retaining means 80 may take the form, for example, of a screw 81, transversely mounted on the base portion 51 of the tubular bushing 50, to allow the traction elements ET to be locked in their surroundings, which may be, by for example, in the form of tensile wires FT of a multi-fiber cable 101, or in the form of CT tensile wires of a low friction cable 102. The enlarged head 82 of the screw 81 directly compresses (see Figures 4A, 5 and 6) or by means of a plate 85 (see Figures 3A and 3B), the extensions of blocking of the tensile elements ET, against an opposite surface portion of the tubular bushing 50.
    [0051] In the configuration illustrated in Figures 1 to 3, the tubular extension 70 is incorporated, as a single piece, to the body portion 52 of the tubular bushing 50.
    [0052] On the other hand, in the configuration illustrated in FIGS. 4 to 6, the tubular extension 70 takes the form of a separate piece that is tightly coupled to the body portion 52 of the tubular bushing 50. In the embodiment illustrated in Figures 4 to 6, the body portion 52 of the tubular bushing 50 has an end annular stop 58 and an internal thread 59, the tubular extension 70 having, in a separate piece, an assembly end portion 70a provided with a thread external 72 to engage the internal thread 59 of the tubular bushing 50 and an external annular stop 73 to be pressed tightly against the end annular stop 58 of the body portion 52 of the tubular bushing 50 to compress between the two opposite annular stops a seal gasket 74 which can take, for example, the shape of an "O" ring.
    [0053] In the configuration illustrated in Figures 7, 8 and 8A, an optical distribution cable 100 is used in the form of a low friction cable 102, which contains a single optical fiber and its terminal portion 100a is defined by a connector C that does not penetrate inside the tubular housing 10. In this construction, the body portion 52 of the tubular bushing 50 also has the end annular stop 58 and an internal thread 59. However, the tubular extension 70 of the bushing Tubular 50 is defined by an input adapter 90 designed to receive and retain the connector C defining the terminal portion 100a of the low friction optical cable 102 that is already prepared in a "connectorized" manner. In this construction, the inlet adapter 90 has an end 91 provided with an external thread 92 to engage the internal thread 59 of the tubular bushing 50 and an external annular stop 93 to be pressed, in a sealed manner, by means of a seal gasket 74, against the end annular stop 58 of the body portion 52 of the tubular bushing 50. Although only three configurations of optical distribution cable assembly were presented to the optical termination box, it will be understood that shape changes may be made and arrangement of the different component parts of the box, without escaping the inventive concept defined in the framework of the claims that accompany the present specification.
    权利要求:
    Claims (13)
    [1]
    1. An optical termination box, comprising: a tubular housing (10) with an open end (10b) and a closed end (10a), provided with an inlet opening (11) of an optical distribution cable (100) ; a cover (20) that can be fixed against the open end (10b) of the housing (10) and crossed by outlet adapters (30) each having an external end (31) and an internal end (32) to connect to the optical distribution cable (100); and a tray (40) for fiber optic housing, to be housed inside the tubular housing (10) when the lid (20) is fixed to the latter and has a first end (41) to settle internally against the end closed (10a) of the tubular housing (10) and a second end (42) mounted internally to the lid (20), characterized in that the first end (41) of the tray (40) has a tubular bushing (50) with a base portion (51) to settle, inside the tubular shell (10), against the closed end (10a) of the latter, and a body portion (52) projecting out of the inlet opening ( 11) and cooperating externally with a traction device (60) operatively associated with the closed end (10a), of the tubular housing (10) keeping the base portion (51) of the tubular bushing (50) axially pressed, so tight, against the closed end (10) of the tubular housing (10), receiving and retaining said tubing bushing lar (50), in its interior and in a sealed manner, a terminal portion (100a) of an optical distribution cable (100) containing at least one optical fiber (FO).
    [2]
    2. Box according to claim 1, characterized in that the closed end (10a) of the tubular housing (10) has, around the inlet opening (11), an inner annular stop (13), oriented towards the inside of the tubular casing, (10) and an outer annular stop (14) turned outward, the base portion (51) of the tubular bushing (50) being provided externally with a peripheral flange (53) to be pressed, by the device traction (60) and tightly, against the inner annular stop (13) of the tubular housing (10) and the traction device (60) being seated against the outer annular stop (14) of the tubular housing (10).
    [3]
    3. Case according to claim 2, characterized in that the body portion (52) of the tubular bushing (50) is provided with an external thread (55), the traction device (60) is defined by a nut (61) which cooperates with the external thread (55) of the body portion (52) and sits against the outer annular stop (13) of the closed end (10a) of the tubular housing.
    [4]
    4. Case according to claim 3, characterized in that the body portion (52) of the tubular bushing (50) incorporates at least one locking means (57), wherein the nut (61) is provided with at least one receiving means of locking (67) to engage with the locking means (57), securing the nut (61) against its unscrewing, after having reached it a final traction position of the tubular bushing (50).
    [5]
    5. Case according to claim 4, characterized in that the locking means (57) takes the form of an external flange (57a) incorporated into the body portion (52) of the tubular bushing (50), near the portion of base (51), and externally to the tubular housing (10), the locking receiver means (67) being defined by a groove (67a) for engaging with the flange (57a), thereby locking the nut (61) on its final traction position of the tubular bushing (50).
    [6]
    6. Case according to any one of claims 1 to 5, characterized in that the body portion (52) of the tubular bushing (50) has a tubular extension (70) inside which it is housed and retained in a sealed manner , a terminal portion (100a) of the optical distribution cable (100), tightly closing the inlet opening (11).
    [7]
    7. Box according to claim 6, characterized in that the tubular extension (70) of the tubular bushing (50) is defined by a heat shrinkable tube that wraps an extension of the optical distribution cable (100) provided with at least one optical fiber and at least two tensile elements (ET) and whose terminal portion (100a) penetrates inside the tubular housing (10) through the interior of the tubular bushing (50), said tensile elements (ET) being fixed, so less in part, to a retaining means (80) of the base portion (51) of the tubular bushing (50).
    [8]
    8. Box according to claim 7, characterized in that the tubular extension (70) is incorporated as a part to the body portion (52) of the tubular bushing (50).
    [9]
    9. Case according to claim 7, characterized in that a portion of the body (52) of the tubular bushing (50) has an end annular stop (58) and an internal thread (59), wherein the tubular extension (70) has a mounting end (70a) provided with an external thread (72) to engage the internal thread (59) of the tubular bushing (50) and an external annular stop (73) to be pressed tightly against the end annular stop (58) ) of the body portion (52) of the tubular bushing (50).
    [10]
    10. Box according to claim with any of claims 7, 8 or 9, characterized in that the optical distribution cable (100) is defined between a low friction cable (102) of single optical fiber , to be divided into multiple bare fiber splitters, and a multiple fiber optic cable (101), with its optical fibers separated into fiber optic extensions (EFO) inside the tubular housing (10), each having output adapter (30) an external end (31) and an internal end (32) to which a respective bare fiber splitter or an optical fiber extension (EFO) is connected.
    [11]
    11. Case according to claim 6, characterized in that a portion of the body (52) of the tubular bushing (50) has an end annular stop (58) and an internal thread (59), the tubular extension (70) of the bushing being tubular (50) defined by an input adapter (90) in which a connector (C) defining the terminal portion (100a) of an optical distribution cable (100) in the form of a low friction cable ("can be connected" low friction ") (102) with a single optical fiber, the input adapter (90) having an end (91) provided with an external thread (92) to engage the internal thread (59) of the tubular bushing (50) and a external annular stop (93) to be pressed, tightly, against the extreme annular stop (58) of the body portion (52) of the tubular bushing (50).
    [12]
    12. Box according to claim with any of claims 6 to 11, characterized in that the lid (20) has a peripheral skirt (21) to be mounted and telescopically fixed, in a sealed and sealed manner, on a peripheral portion of the open end (10b) of the tubular housing (10), where each of the outlet adapters (30) passes through the cover (20) in a sealed manner.
    [13]
    13. Box according to claim 12, characterized in that the cover (20) is crossed, through a through hole (20d), by a check valve (25), pressurizing the tubular housing (10) with its entrance opening (11) and its open end (10b) closed.
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    WO2018102901A1|2018-06-14|
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    BR102018075693A2|2018-12-11|2020-06-23|Furukawa Electric Latam S.A.|OPTICAL DERIVATION OR TERMINATION BOX|
    BR102018077418A2|2018-12-28|2020-07-07|Furukawa Electric Latam S.A.|optical junction box or termination of an optical cable in an optical fiber network|
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    优先权:
    申请号 | 申请日 | 专利标题
    BR102016029000A|BR102016029000A2|2016-12-09|2016-12-09|optical termination box|
    PCT/BR2017/050376|WO2018102901A1|2016-12-09|2017-12-08|Optical termination box|
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