JP5354423B2 - Optical cable connection closure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable open/close work of a sleeve without adversely affecting an optical cable seal part, to simplify wire number checking work of a slot rod lower side in the sleeve, to simplify handling at wiring work, and to greatly improve workability in wiring connection work of an optical cable or attaching work of housed articles. <P>SOLUTION: A cylindrical sleeve 10 covering a circumference of an article 4 for housing an optical cable core wire is divided into three, i.e., an upper sleeve 11 divisible in an up-and-down direction on a horizontal surface, an intermediate sleeve 12, and a lower sleeve 13. A gasket 9 is disposed in a coupling surface of the sleeves 11, 12, and 13. A main cable insertion hole 6<SB>1</SB>and a plurality of branch optical cable insertion holes 6<SB>2</SB>are formed in both ends of the intermediate sleeve 12. An optical cable gripping tool 8 and a tension member fixing tool 8<SB>1</SB>are disposed oppositely to the optical cable insertion holes 6. An attaching tool 14 for attaching and supporting the article 4 for housing the optical cable core wire is disposed in the intermediate sleeve 12. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention is an optical cable connection closure for mutually connecting or branching optical fiber cables (hereinafter referred to as optical cables) for communication lines wired outdoors such as buildings, and is used for processing such as underground cable connection for optical communication. The present invention relates to an optical cable connection closure that can be performed safely and easily and can greatly simplify the workability of optical cable connection work.

  In general, when branching, drawing in, or connecting an optical cable, the optical cable cores are stored in the closure to connect the optical cable cores to each other and to store the optical fiber connection part and the optical fiber cable extra part. Closures with trays are known. In this closure, a core connecting portion such as a connector for connecting optical fiber cores drawn from the main optical cable or core wires drawn from the branching optical cable is housed, and the extra length portion of the connected core wire It is used as what was provided with the extra wire length storage part which winds and protects. (Japanese Patent Laid-Open No. 2003-172827)

  The optical cable connection closure disclosed in Patent Document 1 includes an extra cable length storage tray for storing an optical cable connection portion and an extra cable length connection portion for drawing and connecting the optical cable, and an optical cable on both sides of the optical cable core connection portion. It consists of an end face plate attached through and a cylindrical sleeve that can be divided into two in a vertical division that covers the core wire extra length storage tray, and the divided butted portion of the sleeve mounted between the end face plates is bolted Alternatively, they are connected and integrated by a fixing means such as a band to protect the optical cable connection portion in an airtight manner.

JP 2003-172827 A

However, in a communication network using an optical cable, there is a demand for an optimum wiring form of the optical access network, good workability of the connection wiring, and further providing an optical access service quickly and inexpensively. However, when installing the optical communication device, it is necessary to consider that the wiring cable sufficiently satisfies the characteristics of optical communication, particularly the signal transmission characteristics of the optical cable.
However, in the case of the conventional enclosure closure that protects the optical cable connection part, when performing optical fiber cable core branching, drawing, connection, etc., it is often impossible to open and close the sleeve without affecting the optical cable seal part, If the cords are connected to each other with a connector, etc., and the excess length of the connection cord is wound in a loop shape and stored together with the connection part in the cord storage tray and the storage tray is returned to its original position, the cord length is easily loosened. In addition, it adversely affects the transmission characteristics of the optical cable, and there is an inconvenience that it is not possible to confirm the remaining length of the optical cable stored in the cable storage tray, and the upper side of the closure is used for operations such as cable branching, drawing in, and connection. Even if it is opened, partial inspection and other work on the lower side of the closure cannot be performed, handling in the underground wiring work is complicated, and drainage work is easy when it is submerged in the closure. Rather, the entire assembly process also has become a labor-consuming problem. Also, since the sleeve must be rigid to prevent deformation and prevent moisture from entering, the components of the sleeve must be tightly coupled to each other and the coupling between the cable ends must be tight. The cable set derived from the end face plate is complicated to handle, and in order to fully satisfy the cable fixing, a closure with a hermetic material is complicated to manufacture, expensive and expensive, and it is also uneconomical in terms of durability. In addition, there are many problems such as managing the tightening force and assembling work in order to ensure airtightness even if the end face plate is used.

  In the present invention, it is intended to eliminate these conventional drawbacks, the sleeve opening and closing work can be performed without adversely affecting the optical cable seal portion, the handling in the underground wiring work becomes remarkably simple, and the optical access service can be quickly performed. It can be provided at low cost, and by removing the lower sleeve, it is easy to check the wire number below the slot rod in the sleeve, making it easy to connect the optical cable and install the storage equipment. Drainage work can be performed easily when it is immersed in water, and seal materials can be eliminated even in the entire assembly process. The allowable minimum curvature of the optical cable can be maintained and the optical communication characteristics can be fully satisfied. Workability of the work is greatly improved, the number of man-hours for wiring work is small, optical cables can be fixed, handling of connection wiring such as underground cables can be remarkably simplified, and wiring It is also useful for optimizing things and maintaining the connection so that communication line connection failure does not occur, improving the safety of wiring management, and reducing the cost of a reliable optical cable closure for inspection, identification, and assembly work It is intended to provide in.

  In order to solve the above-described problems, the present invention provides an optical cable core introduction port for introducing an optical cable core wire, and a core wire extra length for winding and storing the optical fiber extra length introduced from the optical cable core introduction port. A sleeve that covers the periphery of the optical cable core housing product comprising an optical cable core storage case having a storage section and a core wire connection section storage section formed in communication with the core wire extra length storage section A cylindrical sleeve having a butt joint surface that can be divided in a horizontal plane, the joint surface being connected and integrated by a fixing buckle, and a plurality of optical cable insertion holes through which optical cables are inserted at both ends of the cylindrical sleeve; An optical cable connection closure provided with an optical cable gripper having an insertion portion for fitting and inserting the optical cable, the optical sleeve being connected to the optical cable insertion hole, wherein the tubular sleeve is The upper sleeve, the intermediate sleeve, and the lower sleeve that can be divided in a horizontal plane are each divided into three sleeves, a gasket is provided on the butt joint surface of each sleeve, and a main optical cable insertion hole and a plurality of holes are provided at both ends of the intermediate sleeve. A branching optical cable insertion hole, an optical cable gripping tool and a tension member fixing tool provided opposite to the optical cable insertion hole, and further equipped with a mounting tool for mounting and supporting the optical cable core wire receiving article in the intermediate sleeve is there.

  In the optical cable connection closure according to the present invention, the optical cable core housing article is provided in an optical cable core housing case having a knob piece or a mounting piece having a bearing hole, an optical cable core wire inlet, and each end portion of the optical cable core. Are formed on one side or both sides of a core wire connection portion storage portion for storing optical cable core wire connection portions connected to each other and an optical cable core wire extra length storage portion for storing the optical cable core wire by winding or slackening. It consists of a plurality of optical cable core storage cases with a structure that can be opened and closed with a cover piece and a core presser piece covering the storage section, and the optical cable core extra lengths on both sides of the optical cable core connection part are collectively Since it can be inserted or stored in the optical cable core storage case after being wound or slackened, the branch optical cable can be easily organized, and each time a move or expansion is performed, such as maintenance and repair, the wiring work It can easily adapt the process even when the necessary to the connection wirings handling of underground cables can significantly simplify, can be processed also help to optimize the wiring work. In addition, if an immersion detection module is deployed and used in the optical cable core housing product as necessary, drainage work can be easily performed when the sleeve is immersed in water, further improving the safety and reliability of the closure. be able to.

  Further, in the optical cable connection closure according to the present invention, the intermediate sleeve is provided with the optical cable insertion hole side by side, and the single optical fiber insertion hole is provided on one side or both sides of the main optical cable insertion hole. By deploying multiple, and installing the main optical cable in the main optical cable insertion hole with a detachable cap through a seal spacer with a seal attached, wiring between the storage items from the outer cover is not neat and cluttered Wiring is easy to follow with eyes and confirmation work is accurate and without misidentification, handling in inspection and connection work is safe and easy, fixing optical cables is easy and safe, and assembly workability is greatly improved. To be able to.

  According to the present invention, the intermediate sleeve includes a ground connection plate that secures ground connection between the left and right optical cable grippers, and an optical cable gripper having a spring function portion is inserted into a contact portion of the ground connection plate. The functional part is locked in the groove of the optical cable gripper to prevent it from coming off, so that it can be connected to the optical cable gripper on the opposite side, and the ground connection plate itself is prevented from coming into contact with the intermediate sleeve. It is better to be able to simplify.

  Further, according to the present invention, the intermediate sleeve is provided with a buckle arm swingably on an arm receiving portion provided at a distance in the vicinity of the opening edge of the upper and lower sleeves, and a buckle having a buckle lever at one end of the buckle arm. Engage / disengage the operating point of the buckle lever to the engaging part formed on the upper and lower sleeves that cover the upper and lower surfaces of the intermediate sleeve so that the upper and lower sleeves can be freely connected to and disconnected from the intermediate sleeve. Therefore, it is preferable that the cylindrical sleeve can be easily assembled and set, the intermediate sleeve can be taken out, wiring work can be performed quickly, and the handling can be simplified and ensured.

  In the optical cable connection closure according to the present invention, the cylindrical sleeve is provided with an RFID capable of reading and updating facility information in the sleeve, and a mark display portion by marking is provided on the outer surface of the upper sleeve facing the RFID. As a result, it is possible to quickly find a construction-compatible closure, and the core cable extra length can be easily inserted directly into the optical cable core storage case and arranged or pulled out of the optical cable core storage case. Since the extra length of the core can be taken in and out by opening and closing, the configuration is simple, handling operations such as taking in and out of the core and pulling out the storage case can be handled without trouble, and communication line connection failure does not occur It is preferable to provide a closure for optical cable connection that can maintain the connector connection and can improve the safety of wiring management and is reliable in the assembly work.

The present invention relates to an optical cable connection comprising a plurality of cable insertion holes through which optical cables are inserted at both ends of a cylindrical sleeve, and an optical cable gripping tool that is provided in the cable insertion holes and has an insertion portion for inserting and holding the optical cable. The cylindrical sleeve is composed of an upper sleeve, an intermediate sleeve, and a lower sleeve that can be divided in a horizontal plane in the vertical direction, and a gasket is provided on the butt joint surface of each sleeve. The intermediate sleeve is provided with a main optical cable insertion hole and a plurality of branch optical cable insertion holes in a row in a horizontal direction at both ends of the intermediate sleeve, and an optical cable gripping tool and a tension member fixing tool are provided opposite to the optical cable insertion hole. Equipped with an attachment that attaches and supports optical fiber cable housing equipment in the sleeve, which has an adverse effect on the optical cable seal. Can sleeve open work pictorial, handling at underground cable wiring work becomes remarkably simplified, also easy wire gauge confirmation work of the slot rod lower in the sleeve by removing the lower sleeve, the main optical cable insertion hole And a plurality of branched optical cable insertion holes in a row in the horizontal direction, so that each optical cable does not overlap vertically, making it easy to connect the optical cables and install the storage equipment, and in the unlikely event that the optical cable is immersed in the closure drainage work be easily performed because removable only under sleeve with time, to maintain an acceptable minimum curvature of the optical cable can also sufficiently meet the characteristics of the optical communication, and greatly improve the workability of the core wire receiving operation, simply by changing the shape of the upper and lower sleeve can be attached to the optical cable core housing supplies various forms, even less optical cables solid steps in wiring work It can also be, and the optical cable connecting closure reliable at the point inspections and identification and assembly work.

  Also, in the present invention, the optical cable core wire housing article is incorporated in the optical cable core wire storage case, and the optical cable core wire storage case is connected to the optical cable core wire inlet and each end of the optical cable core wire. A cover piece for covering the storage portion by forming a core wire connection portion storage portion for storing the core wire connection portion and an optical cable core length storage portion for storing the optical cable core wire by winding or slackening on one side or both sides; The optical cable consists of multiple optical fiber cable storage cases with a structure that can be opened and closed individually, and the optical fiber cable extra length on both sides of the optical cable connection part is wound or slackened together. Because it can be inserted and stored in the core wire storage case, it is easy to organize the branch optical cable, and it is necessary to perform wiring work each time it is moved or expanded, such as relocation and maintenance Even if it is necessary, it can be handled easily, and if necessary, a water immersion detection module can be deployed and used in this optical cable core housing product, so that drainage work can be performed easily and safely when it is immersed in the sleeve. Performance and management reliability can be further improved, optical communication characteristics can be satisfactorily satisfied without causing any inconvenience in optical cable connection, and the minimum allowable curvature of the optical fiber cable can be easily maintained. Therefore, the work of storing the core wire is improved, the wiring work can be simplified, and the optical cable can be easily handled for every branching and expansion of the optical cable, so that it can be used safely.

Further, the optical cable core housing supplies in the present invention, also the structure can be light in weight and compact, the wiring work of connecting the optical cables to exceedingly easy and cord extra length by opening and closing take out the core wire receiving case from the frame The optical cable can be stored while maintaining the minimum allowable curvature of the optical cable, the optical communication characteristics can be fully satisfied, the number of man-hours for wiring work can be reduced, and the optical cable can be fixed. Also, it helps to optimize the wiring work, maintain the connector connection so that communication line connection failure does not occur, improve the safety of wiring management, and provide a reliable optical cable connection closure at low cost Can be provided.

  Furthermore, the present invention can be assembled by inserting the optical cable core storage case into the closure by inserting the optical cable core storage case from above. In addition, the cable can be stored, taken out, or pulled out in a loop shape in the optical cable core storage case, making it easy to check, repair, adjust, and work on the connection status, and the length of the optical cable core The cable can be stored well, and there is plenty of room for winding and storing the core, and the core is held in a shock-absorbing manner by the lid piece, so that the core does not sag, making it impossible for the optical fiber In addition to eliminating optical loss and maintaining good transmission characteristics without the occurrence of undulating bends or small arcs, the optical fiber terminal can be detachably connected with simple operation when using optical communication. Rukoto can, can significantly improve the core wire connection workability can also help improve the reliability of mounting the switching wiring work can also be satisfactorily safely perform simple and appearance wiring work.

FIG. 3 is a perspective view of the optical cable connecting closure showing the first embodiment of the present invention, in a separated state with the upper, middle and lower sleeves removed. FIG. 2 shows an assembled state in which sleeves used in the example of FIG. 1 are connected, (a) is a perspective view thereof, and (b) is an enlarged longitudinal sectional view thereof. FIG. 1 shows an optical cable connection closure of the example of FIG. 1, (a) is a plan view of a cylindrical sleeve showing the inside with the upper sleeve removed, and (b) shows the inside with the optical cable core wire storage article removed. It is a top view of the cylindrical sleeve shown. The optical cable core wire storage case used in the example of FIG. 1 is shown, (a) is a developed plan view, (b) is a longitudinal sectional view thereof, and (c) is a perspective view of the assembled state. FIG. 1 shows a state when an optical cable is mounted on the intermediate sleeve used in the example of FIG. 1, (a) is a perspective view of a part of the intermediate sleeve when the port case is installed, and (b) is an intermediate sleeve in which the port case is assembled and fixed. It is a one part perspective view. FIG. 1 shows a state of the intermediate sleeve used in the example of FIG. 1 when the optical cable is not mounted, (a) is a perspective view of a part of the intermediate sleeve of the intermediate sleeve when the closing plug is installed, and (b) is a state in which the closing plug is incorporated. It is a perspective view of a part of the fixed intermediate sleeve. The port case used by the example of FIG. 1 is shown, (a) is the front view, (b) is the side view, (c) is the side view. The port case in the example of FIG. 7 is shown, (a) is the perspective view, (b) is the perspective view seen from the lower side in order to represent the bottom face side. FIG. 7 shows the unfolded state of the port case of FIG. 7, (a) is a plan view thereof, (b) is a front view thereof, (c) is a side view thereof, (d) is an enlarged bottom view thereof, and (e) is an enlarged assembly view. It is a longitudinal cross-sectional view. 7 shows a developed state of the port case of FIG. 7, (a) is a plan view thereof, (b) is a front view thereof, and (c) is a central longitudinal sectional view thereof. FIG. 10 shows a seal cap used in the example of FIG. 10, (a) is a plan view thereof, (b) is a front view thereof, (c) is a front view thereof in a separated state, and (d) is a bottom view of its upper member. It is a top view of a lower member. The optical cable holding part used by the example of this invention is shown, (a) is a front view in an assembly state, (b) is a perspective view which expands and shows the holding piece. FIG. 2 shows an operating state of a buckle when assembling a sleeve used in an example of the present invention, (a) is a partially enlarged longitudinal sectional view of the separated state, and (b) is a partially enlarged longitudinal sectional view of an engagement holding state. FIG. 1 shows the fixture used in the example of FIG. 1, wherein (a) is a perspective view of the stopper, (b) is a perspective view of a bar for attaching the stopper, and (c) is a perspective view of a bar for attaching another stopper. It is a perspective view. FIG. 6 is a perspective view of an optical cable connecting closure showing a second embodiment of the present invention in a separated state with upper, middle and lower sleeves removed. The assembled state which connected the sleeve used for the example of FIG. 15 is shown, (a) is the perspective view, (b) is the expansion longitudinal cross-sectional view. FIG. 16 shows the optical cable connection closure of the example of FIG. 16, (a) is a plan view of the cylindrical sleeve showing the inside with the upper sleeve removed, and (b) shows the inside with the optical cable core wire storage article removed. It is a top view of the cylindrical sleeve shown. The optical cable connection closure which shows 3rd Example of this invention is shown, (a) is a size L type perspective view, (b) is a size S type perspective view. FIGS. 18A and 18B are optical cable connection closures used in the example of FIG. 18, in which FIG. 18A is a plan view of a part of a cylindrical sleeve showing the inside with the upper sleeve removed, and FIG. The optical cable core wire storage case used in the example of FIG. 18 is shown, (a) is a plan view, (b) is a vertical cross-sectional view thereof, and (c) is a vertical cross-sectional view of a cover piece in a developed state. 18 shows a size S-type optical cable connection closure used in the example of FIG. 18, (a) is a longitudinal sectional view thereof, (b) is a plan view of an optical cable core storage case used in the example, and (c) is a diagram thereof. (D) is an enlarged cross-sectional view showing a fitting / attaching state, (e) is a cut side view thereof, and (f) is a vertical cross-sectional view of an optical cable core storage case having a fall prevention function. The intermediate sleeve used for the example of FIG. 18 is shown, (a) is a partial plan view, (b) is a front view, and (c) is a front view showing an attached state of the optical cable gripping portion. FIG. 18 shows the optical cable gripping portion of the example of FIG. 18, (a) is a plan view, (b) is a front view thereof, (c) is a plan view of a part thereof, and (d) is a state in which the optical cable gripping portion is attached. The front view to show, (e) It is the assembly state front view. The cylindrical sleeve used in the example of FIG. 18 is shown, (a) is a partial longitudinal sectional view, and (b) is a side view showing the outer surface thereof. The tension member holding | gripping tool used in the Example of this invention is shown, (a) is the perspective view of the one part action state, (b) is the perspective view of the action state of another example. 21 is an optical cable connection closure showing another example of the example of FIG. 21, wherein (a) is a longitudinal sectional view thereof, (b) is a plan view of a part of the intermediate sleeve, and (c) is a front view thereof.

The first embodiment of the optical cable connection closure according to the present invention will be described with reference to the examples of FIGS. 1 to 14. The optical cable core inlet 1 for introducing the optical cable core a, and the optical cable core inlet 1 A core wire extra length storage portion 2 for winding and storing the extra length of the optical fiber core a to be introduced, and a core wire connection portion accommodation portion 3 formed in communication with the extra length extra length storage portion 2 sleeve covering the periphery of the optical cable core wire receiving goods 4 consisting of an optical cable cord storage case 4 ₁ with the vertical direction to have a butt joint surfaces may be resolved in the horizontal plane, connected by locking buckle 5 the joint plane A cylindrical sleeve 10 to be integrated, a plurality of optical cable insertion holes 6 through which the optical cable A is inserted into both ends of the cylindrical sleeve 10, and the optical cable A inserted into and held by the optical cable insertion hole 6. Insert An optical cable connection closure provided with an optical cable gripping tool 8 having a passage portion 7, wherein the cylindrical sleeve 10 is divided into an upper sleeve 11, an intermediate sleeve 12, and a lower sleeve 13 that can be divided in a horizontal plane in the vertical direction. Each of the sleeves 11, 12, and 13 is provided with a gasket 9 on the butt joint surface of the sleeves 11, 12, and 13 so that the joint surfaces can be abutted and integrated with high density via the gasket 9. 12 both ends and a main optical cable insertion hole ₆₁ and a plurality of branched optical cable insertion hole 6 _2, the optical cable gripping member 8 and the tension member fastener ₈₁ provided oppositely arranged to each optical cable insertion holes 6, further intermediate the fitting 14 for attachment supports the optical cable core housing housing 4 to arrange the optical cable core wire receiving case 4 ₁ a cylindrical or square tube shape in the sleeve 12 It is equipped.

  The cylindrical sleeve 10 is formed of a plastic synthetic resin or other durable material, and upper and lower sleeves 11 and 13 are provided on the upper and lower surfaces of the intermediate sleeve 12 in a detachable or openable manner. With a structure that can be detachably attached by a fitting structure or slide structure that can be detachably attached, or can be opened and closed by a buckle 5 or a hinge part, the cable can be securely fixed by a simple operation with fewer man-hours for wiring work. As shown in FIG. 2, it can be used in a state of good appearance such as a cylindrical shape, an elliptical cylindrical shape, a rectangular cylindrical shape, and the connection means can be detached or attached during maintenance or cable separation. It is easy to carry out and facilitates wiring. If the upper and lower sleeves 11 and 13 are of the same form, they are easy to manufacture, economical and easy to handle.

  In the first embodiment of the optical cable connection closure according to the present invention, the upper and lower sleeves 11 and 13 are detachably attached to the upper and lower surfaces of the intermediate sleeve 12 as the oval cylindrical tubular sleeve 10 shown in FIGS. However, the optical fiber cable housing article 4 provided in the cylindrical sleeve 10 is radially attached to a fixture 14 having a ring-shaped shaft rod or a slide seal provided parallel to the horizontal direction. Alternatively, it can be inserted and attached in a parallel manner so that it can be stored in a maximum of 65 (325 connection portions) + inundation detection module case.

The optical cable core housing article 4 used in the cylindrical sleeve 10 has an optical cable core housing case 4 ₁ having a knob piece 14 ₁ or a mounting piece 14 ₃ having a bearing hole 14 ₂ as shown in FIG. mounted by attaching plug the plurality to the fixture 14 furnished with is configured, the optical cable core housing case 4 _1, the optical cable core inlet 1, and accommodates the winding or slackened the optical cable core The optical cable core extra length storage part 2 and the optical fiber core connection part storage part 3 for storing the optical cable core connection part b where the optical cable core ends are connected to each other are formed on one side or both sides to form the storage part. the lid member 4 ₂ and cord becomes a pressing piece 4 ₃ an optical cable core housing case 4 ₁ having the structure each with openably from those multiple deployed optical cable center core wires each end are connected to each other to cover Can be inserted accommodated in connecting part b, for example, MT-type connector cable core housing case 4 ₁ winding or slackened at once optical cable cores extra length on both sides, such as to be connected to the end of the splice or connector or cable a . Further, if an immersion detection module (not shown) is provided and used in the optical cable core housing article 4 as necessary, the drainage operation when the immersion into the cylindrical sleeve 10 can be easily performed and the safety of the closure. And management reliability can be further enhanced.

Further, as the light cable core housing case 4 ₁ is made of a plastic sheet of the rectangular transparent or translucent, and the lid piece 4 ₂ and core wire pressing piece 4 ₃ at folding lines to both side edges as shown in FIG. 4 Although are used on both sides is provided freely opened and closed as the optical cable core housing case 4 ₁ double-sided structure can hold the optical cable core extra length and the optical cable core connection portion b, folded Tadashi type square section or triangular It is preferable to have a fall prevention function, but as shown in FIG. 5, a plastic sheet is folded in half along a fold line to form a pocket portion to form an optical cable core wire extra length storage portion 2 and a core wire connection portion storage portion. 3 and thereby, may be used as the optical cable core housing case 4 ₁ opened and closed as the edge abutting the end edge.

In this case, the configuration to allow the optical cable core projecting the housing case 4 ₁ of the upper edge or lower edge ends in a knob piece 14 ₁ or protrusion 14 ₃ with a bearing hole 14 _2, have a falling prevention function may use those of Yes is accommodated or easily taken out slackened the wheel up or substantially U-shaped by winding a cable core extra length, the optical cable core housing case 4 ₁ optical cable cores housed Supplies when inserted into and removed from the fixture 14 as 4, the optical cable core wire receiving case 4 ₁ to good to easily pulled out easily or mounted from the mounting device 14 of the optical cable core housing housing 4 picking the knob piece 14 _1, The case can be opened and closed and the extra length of the cord and the cord connection can be easily inserted and arranged or pulled out, so that the minimum curvature of the optical cable can be maintained and the cord can be stored. Work can be done quickly and easily.

In the optical cable connection closure according to the present invention, the intermediate sleeve is fitted into the optical cable insertion hole 6 in the end face plate 30 formed at both ends of the sleeve as shown in FIGS. 5 and 7 when the optical cable is mounted. to use a port casing 31 of split structure is detachably mounted by the holding piece 37 is good, the port casing 31 is integrally connected by screws 38 against the dividing plane 31 ₁ as shown in FIGS. 7 to 11 be used in a sealing rubber 35 with a slit 35 ₁ in the port casing 31, butt with mounting the seam seal 36 made of a rubber-like elastic material with a separation surface 36 _1, seam sealing with the sealing rubber 35 36 And a seal cap 40 that press-supports the cable in the axial direction of the cable and is detachably mounted by a fastening piece 41. It is preferable that. However, when the optical cable insertion hole 6 is not used, that is, when the optical cable A is not inserted into the optical cable insertion hole 6, when the optical cable is not mounted, a cylindrical blocking plug 34 is used instead of the port case 31 as shown in FIG. It is preferable to use it while maintaining the sealing performance by inserting it into the insertion hole 6 and putting it in a sealed state in a detachable manner by the holding piece 37 and pressing it.

Note that the port casing 31, the hinge portion 33 with a falling preventing function on the outer surface to form a cylindrical pocket 32 in the outer cylinder wall of the two-piece structure having a split face 31 ₁ butt central longitudinal direction, for example a pair of The hook and the support shaft for locking the hook are opposed to each other and are detachably connected to the outer wall, and are attached / detached by a hinge portion 33 that prevents the rotation from the support shaft when the hook is inserted and engaged. is rotatably connected, by the seal cap 40 having a cylindrical 40 ₁ inner pressure contact supporting the seam seal 36 and seal rubber 35 which is furnished in the cable axis direction cylindrical pocket 32, the axial longitudinal seal rubber 35 It is effective to use it so as to improve the sealing performance by axially compressing it to ensure airtightness with the optical cable A. (FIGS. 7 to 8)

In this case, be configured to fit a hollow cylindrical seal rubber 35 with a slit 35 ₁ in the cylindrical pocket 32, and a seam seal 36 made of a rubber-like elastic material with a butt separation surface, the port casing by the seal cap 40 with a inner cylinder 40 ₁ is fitted into the cylindrical pocket 32 of 31, fastening strips 41, for example bolts, by fastening piece 41 such as a screw nut or tightening in the axial longitudinal direction of the sealing rubber 35 The seal member is axially compressed. (FIGS. 9 to 10)

Further, in the cylindrical pocket 32 as the joint seal 36 which is furnished by the mounting pieces 36 ₁ projecting the seam seal 36 of semicircular along the circumference of the cable insertion hole 6 on one side, the opposing surface When the seal cap 40 is fastened to the port case 31 with the fastening piece 41, the seam seal 36 can be pressed against the optical cable A in the axial direction. It is designed to enhance sex.

Further, as the seal rubber 35, those such as hardness 0~30Hs [penetration 40~90 (10- ¹ mm)] hardness 0~40Hs of EPDM rubber or elastomer elongation 500-2000 preferably preferably in 5~20Hs Vulcanized rubber composition with 800-2000% and tensile strength of 10-60 kg / cm ² such as EPR, EPDM, silicone rubber (Q), butyl rubber (IIR), styrene / butadiene rubber (SBS) or fluoro rubber (FKM) The one composed of hardness is selected and used.

Still also the Shirukyatsupu 40, the inner cylinder 40 ₁ is furnished to the port casing 31 in the cylindrical wall of the two-piece structure which is bisected in the vertical direction in the middle provided with a flange portion 40 ₂ at one end is formed, tightening such opposing the flange portion 40 removably fixed in ₂ to project into the boss 40 ₃ and the boss hole 40 ₄ of the engaging portion, the tightening further bolt in a mounting hole 42 provided in the flange portions 40 ₂ screws linked tightened to the port casing 31 fitted the biasing pieces 41, the move is fitted to the inner cylinder 40 ₂ in the pocket 32 of the port casing 31 by tightening the該締with piece 41 the sealing rubber 35 can be axial compression It is like that. (FIGS. 10 to 11)

In the optical cable insertion hole 6 formed in the end face plate 30 in the intermediate sleeve 12, a port case 31 having a seal comb 35 and a seam seal 36 is inserted and attached to the end face plate 30 together with the holding piece 37. fixing the rubber seal 35 through the slits 35 ₁ in the required positions of the optical cable a, assembling the port casing 31 of the two-piece structure with attached and seam seal 36 and the seal rubber 35 in the pocket 32, the port casing 31 After the holding piece 37 is temporarily fixed to the end face plate 30 after being inserted into the optical cable insertion hole 6 of the end face plate 30, the screw of the holding piece 37 may be fastened and fixed. Then assembled fitted a Shirukyatsupu 40 with the cylinder 40 ₁ among which can be inserted into the pocket 32 of the port casing 31 to the port casing 31, the axial longitudinal the seal rubber 35 when tightened the clamping piece 41 of Shirukyatsupu 40 It is preferable that the sealability of the seal portion of the optical cable A can be enhanced by axial compression in the direction.

In this optical cable connection closure, as the optical cable gripper 8 having the insertion portion 7 provided in the optical cable insertion hole 6, an engagement member 43 having an arc-shaped inscribed surface along the outer periphery of the optical cable A is used as the cable. A clamping element 44 is formed by selecting a plurality of layers according to the diameter and detachably overlapping the gripping pieces 44 so as to be opposed to each other so as to be openable and closable around a support shaft 45 and to connect the free ends of both gripping pieces 44 detachably. 46, which is configured to eliminate the deviation of the cable center when the optical cable diameter is different, and is detachably mounted on the intermediate sleeve 12 via the mounting base 47.
A plurality of optical cable gripping tools 8 are arranged in parallel on the mounting base 47, and correspond to the main optical cable insertion hole and the branch optical cable insertion hole provided as the optical cable insertion hole 6, respectively, and the end face plate 33 and the tension member fixture 8 _1. The support shaft 45 that is interposed between and supports the arm-shaped gripping piece 44 is supported by the bearing portion 48 provided on the mounting base 47 and is powerfully adapted to the diameter of the optical cable A. It can be pinched. (Fig. 12)

  Further, as shown in FIG. 13, the intermediate sleeve 12 used in the present invention swings the buckle arm 21 on the arm receiving portion 20 provided at a distance in the vicinity of the opening edge of the upper and lower sleeves 11 and 13, respectively. A latching portion provided on the upper sleeve 11 and the lower sleeve 13 that is provided so as to be movable and has an operating point c of the buckle lever 22 on the upper and lower surfaces of the intermediate sleeve 12 by a buckle having a buckle lever 22 at one end of the buckle arm 21. 23 so that the upper sleeve 11 and the lower sleeve 13 can be freely connected to and released from the intermediate sleeve 12 so that the cylindrical sleeve 10 can be easily assembled and removed. It is preferable that the wiring work can be performed quickly and the handling can be simplified and ensured.

The fitting 14 for attachment supports the optical cable core accommodating goods 4, a mounting bar 14 ₅ provided with a frame 14 ₄ if necessary, mounting bar to place the optical cable core housing case 4 ₁ 14 _5, slide along the stopper 14 ₆ to the bar 14 ₅ according to the counter value of the bar 14 ₅ to slidably equipped with plate-shaped stopper 14 ₆ which from now light cable core housing case 4 ₁ Thus, the necessary number of sheets can be appropriately arranged in the cylindrical sleeve 10 by the configuration in which they are aligned and held. (Fig. 14)

Incidentally, the stopper 14 ₆ Insert the optical cable core wire receiving case 4 ₁ in a ring-shaped mounting bar 14 ₅ or rail-shaped mounting bar 14 ₅ which is oppositely arranged in parallel in the horizontal direction as shown in FIG. 14b and Fig. 14c While supporting and sliding tailored to slidably used installed number to allow sliding on the bar 14 _5, by inserting insert the bearing hole 14 ₂ of the optical cable core housing case 4 ₁ attachment piece 14 ₃ more and held for example, mounting number 65 sheets maximum (325 connection portion) + Water sensor module case stowable cable core housing case 4 ₁ of those radial or fitted are arranged in parallel form by detachably bayonet mounted fixed state Used.
In this case, the stopper 14 _6, features an engaging portion 49, 50 can be freely fitted removably to the rail-shaped bar 14 ₅ which is oppositely arranged in parallel to the ring-shaped bars 14 ₅ or horizontal direction stopper 14 ₆ pair of to allow sliding along the bar 14 _5, or form when small installation number of the optical cable core housing case 4 ₁ sandwiching the optical cable core wire receiving case 4 ₁ between the pair of stoppers 14 _6, or by pinching interposed held between the raised projecting the plate-like frame 14 ₄ Standing on one side of the bar 14 ₅ and the bar 14 ₅ attached to the pair of bars 14 ₅ arranged in the horizontal direction upward, working easier to adjust work of taking out or opening degree of the optical cable core wire receiving case 4 ₁ between sandwiching the optical cable core wire receiving case 4 ₁ by moving the stopper 14 ₆ when Good to Unisuru. (Fig. 14a)

The second embodiment of the optical cable connecting closure according to the present invention is a flat rectangular tube that reduces the protrusion in the vertical direction in order to make it compact when it must be arranged in a narrow facility area as shown in FIGS. As a cylindrical sleeve 10, low-profile thin upper and lower sleeves 11 and 13 are detachably connected to the upper and lower surfaces of the intermediate sleeve 12 by a buckle 5 to form a size S type. that the optical cable core accommodating goods 4, the mounting pieces 14 ₃ at both ends of the rectangular clamshell or upper or lower edge of the core wire receiving case 4 _single-sided housing with a bearing hole 14 ₂ projected, falling prevention using what configuration so as to have a function, longitudinally equipped arranged fitting 14 with a rail-shaped bar 14 ₅ which is oppositely arranged further in parallel in the horizontal direction, the number of mounting It is used as a maximum of 24 sheets (120 connections) + inundation detection module case can be stored.
Incidentally, the optical cable core housing case 4 _1, the upstream and the optical cable core wire introduction section 1 for introducing the optical cable core on the downstream side is arranged in a pair left and right, optical cable heart entering from the light cable core inlet section 1 optical cable connecting section core wire each end of the line and the branch optical cable core are connected to each other, for example a splice or a connector, a plurality of optical cables cord storage cases 4 ₁ having a pocket for accommodating the cable cores extra length Because it can be installed as an optical cable core housing product 4, it can be processed neatly without entanglement of the core cables, handling of connection wiring can be remarkably simplified, and it can be processed to help optimize the wiring work. It can be built in by inserting the optical cable core case from above, so you only need to open and close the upper sleeve when working. Turn increases workability can be greatly improved.

In the third embodiment shown in FIGS. 18 to 26, a plurality of optical cable insertion holes 6 through which the optical cable A is inserted into both ends of the cylindrical sleeve 10 and the optical cable insertion holes, as in the first embodiment or the second embodiment. 6 is an optical cable connection closure provided with an optical cable gripping tool 8 having an insertion portion 7 for fitting and gripping the optical cable A, and the cylindrical sleeve 10 can be divided in a horizontal plane in the vertical direction. The upper sleeve 11, the intermediate sleeve 12, and the lower sleeve 13 are divided into three sleeves. A gasket 9 is provided on the butt joint surface of each sleeve 11, 12, 13, and each joint surface has a high density via the gasket 9. to thereby allow contact integrated and a main optical cable insertion hole ₆₁ and a plurality of branched optical cable insertion hole 6 ₂ at both ends of the intermediate sleeve 12, the optical cable And oppositely arranged to the through hole 6 provided with an optical cable gripping member 8 and the tension member fastener _81, the optical cable core further arranged an optical cable core wire receiving case 4 ₁ a cylindrical or square tube shape to the intermediate sleeve 12 A fixture 14 for mounting and supporting the housing article 4 is provided, and a water drainage detection module 15 is provided on the optical cable core housing article 4 so that the drainage work can be easily and accurately performed when the tubular sleeve 10 is submerged. And management reliability. (FIGS. 18 to 19)

Further, as the optical cable core housing case 4 _1, made of plastic sheet, respectively provided to freely open and close the lid member 4 ₂ and core wire pressing piece 4 ₃ at folding lines to both side edges as shown in FIG. 20 the front and back as but are used as an optical cable core housing case 4 ₁ double-sided structure can hold the optical cable core extra length and the optical cable core wire contacting portion b on both surfaces, to have a function of preventing collapse folded Tadashi type square section or triangular However, as shown in FIG. 21, the plastic sheet is folded in half by a folding line to form one pocket portion to form an optical cable core wire extra length storage portion 2 and a core wire connection portion storage portion 3, and one end edges may be used as the optical cable core housing case 4 ₁ opened and closed as the edge butt.

Moreover, the intermediate sleeve 12, there is deploying an optical cable insertion hole 6 side by side, and deployed at the branch optical cable insertion hole 6 ₂ spacing of the plurality or singular on one or both sides of the main optical cable insertion hole _61, by wearing at the main optical cable insertion hole 6 seal spacer 16 removable Kyatsupu 17 through the attached application seals the main optical cable _1, not cluttered by wiring between storage goods from when the envelope is clean The wiring is easy to follow and the confirmation work is accurate, the handling in inspection and connection work can be handled safely and easily, the optical cable can be fixed easily and safely, and the assembly workability can be greatly improved. (See Figure 22)

Further, examples of intermediate sleeve 12 is provided with a ground connection plate 18 to ensure the continuity of the ground of the right and left of each optical cable gripper 8, the optical cable gripping member having a spring function portion 18 ₁ in the contact portion of the ground connection plate 18 8 insert the possible conduction between the optical cable gripping member 8 on the opposite side it has a disengagement-prevention structure engages the spring function portion 18 ₁ in the groove 19 of the optical cable gripping member 8, the ground contact with the intermediate sleeve 12 It is preferable that the connecting plate 18 itself be prevented from coming off and the assembly configuration can be simplified. (See Figure 23)

  Further, as shown in FIG. 13, the intermediate sleeve 12 according to the present invention swings a buckle arm 21 on an arm receiving portion 20 provided at a distance in the vicinity of the opening edge of the upper and lower sleeves 11 and 13, respectively. A locking portion 23 formed on the upper sleeve 11 and the lower sleeve 13 that is provided freely and has an action point c of the buckle lever 22 on the upper and lower surfaces of the intermediate sleeve 12 by a buckle having a buckle lever 22 at one end of the buckle arm 21. Since the upper sleeve 11 and the lower sleeve 13 can be freely connected to and disconnected from the intermediate sleeve 12 by being engaged and disengaged, the cylindrical sleeve 10 can be easily assembled and set, and the intermediate sleeve 12 is taken out and wired. It is preferable to adopt a configuration in which work can be performed quickly and the handling can be simplified and ensured.

As shown in FIG. 24, an RFID 24 capable of reading and updating facility information is provided in the cylindrical sleeve 10, and a mark display unit 25 by marking is provided on the outer surface of the upper sleeve 11 facing the RFID 24. together are, organize cord excess length to the optical cable core wire receiving case 4 ₁ is inserted to facilitate direct, it is also available and out of opening and closing the core wire surplus length drawn out from the storage case.
In this case, the optical cable to the front and back surfaces of the core wire receiving case 4 _1, utilizing space of the cord excess length storage pockets, cord extra length for accommodating by winding or loosened at once optical cable cores extra length It is preferable to form the storage portion 2 and the core wire connection portion storage portion 3 of the optical cable connection portion b and communicate with the optical cable core wire inlet 1. (See Figure 20)

  Further, in the tension member gripping tool 26 provided in the optical cable gripping tool 8, in the case of the slide structure as shown in FIG. 25 (FIG. 25 a), the tension member d is inserted into the insertion groove 27 of the main body and the lid 28 is attached. After sliding and covering the tension member d, the screw 29 is fastened and fixed, or in the case of a hinge structure (FIG. 25b), the tension member d is inserted into the insertion groove 27 of the main body and the lid 28 is closed, It is preferable to fix the screw 29 for fixing the tension member d after fixing the screw 29 for fixing the lid.

The optical cable A entering from the optical cable insertion hole 6 of the cylindrical sleeve 10 having the above configuration is held by the locking member of the optical cable gripping tool 8 and is stored as the optical cable core a in the optical cable core housing article 4. in case 4 _1, is wired is fitted into the optical cable inlet 1, core wire extra length is to be accommodated slack looped up or substantially U-shaped core wire excess length storage section 2, the optical cable core wire connection portion b is accommodated in the core wire connecting portion accommodating portion 3. And if extended lower part of the (downstream core branch), was cut at the midpoint Remove the core from the cable core wire receiving case 4 _1, optical cable connection part of the mechanical splice the cut the main cable and the core wire of the branch optical cables After connection by b used, optical cable connection b was fitted and fixed to the optical cable core wire receiving case 4 ₁ of core wire connecting portion housing portion 3, upstream and cord excess core wire surplus length of the downstream The long storage part 2 may be stored in a rounded shape or slacked into a substantially U shape. It may be a connection processing work is taken out core is pulled out optical cable core housing case 4 ₁ optical cable core wire receiving goods 4 are taken out of the connection excess length.

The obtained prevents that core wire rubs against the cable core housing case 4 _1, tensile, etc. can also be reliably prevented shock, performs addition, the wiring connection work without optical signal loss that can secure wiring The cable can be securely fixed with a simple operation with few man-hours for wiring work, and it is possible to connect the optical cable with safety and reliability, and the connector where each end of the optical cable is connected to each other is reliable. In particular, it can maintain the connection so that communication line connection failure does not occur, and the safety of wiring management can be improved, the reliability of assembly work is also improved, and the connection workability is also improved by helping to optimize the wiring work It can be greatly improved.

As shown in FIG. 26, the optical cable connection closure according to the present invention is formed into a flat rectangular tube-shaped cylindrical sleeve 10 in order to make it compact, and lid-shaped upper and lower sleeves 11, 13 are provided on the upper and lower surfaces of the intermediate sleeve 12. have been connected by detachably buckle 5, arranged main optical cable insertion hole ₆₁ in a central portion, the optical cable core to be mounted to the branch optical cable insertion hole 6 ₂ arranged cylindrical sleeve 10 on both sides receiving goods 4 projecting Figure 20 or mounting pieces 14 ₃ with a bearing hole 14 ₂ rectangular clamshell cord storage case 4 ₁ of the upper edge or both ends of the lower edge shown in FIG. 21, fall prevention function It is used as a device that can be installed in a fixture 14 with a shaft rod using a structure that can hold a maximum of 25 sheets (250 connection parts) + inundation detection module case storage
These said optical cable core housing case 4 _1, the upstream and the optical cable core wire introduction section 1 for introducing a downstream side of the optical cable is arranged in a pair left and right, and branch cable cores entering from the light cable core inlet section 1 optical cable connecting section core wire each end of the optical cable cores are connected to each other, for example a splice or a connector and optical cable center in a plurality of optical cables cord with a pocket for accommodating the optical cable core wire excess length accommodating cable 4 ₁ Since it can be installed as the wire accommodating article 4, it can be processed in an orderly manner without entanglement of the core wires, the handling of the connection wiring can be remarkably simplified, and it can be processed to help optimize the wiring work.

  In each of the embodiments of the optical cable connection closure according to the present invention, the sleeve configuration example provided with the butt joint surface that can be divided in the horizontal direction in the vertical direction has been described, but the butt joint surface that can be divided in the vertical direction in the left and right direction. The present invention can also be applied when used as a closure of the provided sleeve configuration example.

A Optical cable
a Optical cable core
b Optical cable connection
c Action point
d Tension member
1 Optical cable core wire introduction part
2 Extra conductor length storage
3 Wire connection storage
4 Optical fiber cable housing products
4 ₁ optical cable core wire storage case
4 ₂ lid pieces
4 ₃ core wire presser
5 buckle
6 Optical cable insertion hole
6 ₁ Main optical cable insertion hole
6 _2- branch optical cable insertion hole
7 Insertion section
8 ₁ Tension member fixture
9 Gasket
10 Tubular sleeve
11 Upper sleeve
12 Intermediate sleeve
13 Lower sleeve
14 Attachment
14 ₁ knob piece
14 _Two bearing holes
14 ₃ Mounting pieces
14 ₄ frames
14 ₅ bar
14 ₆ Stopper
15 Inundation detection module
16 Seal spacer
17 Cap
18 Ground connection plate
18 ₁ Spring function part
19 groove
20 Arm receiver
21 Buckle arm
22 Buckle lever
23 Locking part
24 RFID
25 Display section
26 Tension member gripping tool
27 Insertion groove
28 lid
29 screws
30 End plate
31 port case
31 ₁ face to face
32 pockets
33 Hinge part
34 Blocking plug
35 Seal rubber
35 ₁ slit
36 Seam seal
36 ₁ Mounting piece
37 Holding piece
38 screws
39 Mounting hole
40 Seal cap
40 ₁ inner cylinder
40 ₂ flange
40 ₃ bosses
40 ₄ boss holes
41 Fastening pieces
42 Mounting hole
43 engaging member
44 Grip piece
45 Spindle
46 Fastener
47 base
48 Bearing part
49 engaging part
50 engaging part

Claims (9)

An optical cable core introduction port for introducing an optical cable core, a core wire extra length storage portion for winding and storing the extra length of the optical cable introduced from the optical cable core introduction port, and A sleeve that covers the periphery of an optical cable core housing article comprising an optical cable core storage case having a core wire connecting section storage section formed in communication with each other has a butt joint surface that can be divided in a horizontal plane in the vertical direction. A cylindrical sleeve in which the joint surface is connected and integrated by a fixing buckle, and a plurality of optical cable insertion holes through which the optical cable is inserted at both ends of the cylindrical sleeve; In an optical cable connection closure provided with an optical cable gripper having an insertion portion for inserting and gripping,
The cylindrical sleeve is composed of an upper sleeve, an intermediate sleeve, and a lower sleeve that can be divided in a horizontal plane in the vertical direction, and a gasket is provided on the butt joint surface of each sleeve, and both ends of the intermediate sleeve are provided. A main optical cable insertion hole and a plurality of branch optical cable insertion holes are provided in a row in the horizontal direction, and an optical cable gripping tool and a tension member fixing tool are provided opposite to the optical cable insertion hole, and an optical cable core is provided in the intermediate sleeve. A closure for connecting an optical cable, which is equipped with an attachment for attaching and supporting a wire housing article.   The optical cable connection closure according to claim 1, wherein the optical cable core housing article is an optical cable core housing case having a knob piece or a mounting piece with a bearing hole, an optical cable core wire inlet, and an optical cable core wire. A single-sided or double-sided optical fiber core wire storage portion for storing optical fiber core wire connection portions whose ends are connected to each other and an optical cable core wire length storage portion for storing the optical cable core wire by winding or slackening are formed on one or both sides. A closure for connecting an optical cable, comprising a plurality of optical cable core storage cases each having a structure in which a cover piece and a core presser piece covering the storage portion are provided to be freely opened and closed.   The optical cable connection closure according to claim 1 or 2, wherein a port case having a two-part structure that fits into the optical cable insertion hole in an end face plate formed at both ends of the intermediate sleeve is detachable by a holding piece. A seal that attaches and attaches a seal rubber having a slit to the port case and a seam seal made of a rubber-like elastic body having a butting separation surface, and press-supports the seal rubber and the seam seal in the cable axial direction. A closure for connecting an optical cable, characterized in that the cap is detachably mounted with a fastening piece.   4. The optical cable connection closure according to claim 3, wherein the port case forms a cylindrical pocket with an outer cylindrical wall having a two-divided structure having a dividing surface in a central longitudinal direction, and is detachably connected by a hinge portion. An optical cable connection closure characterized in that the seal rubber is axially compressed in the longitudinal direction of the shaft by the seal cap provided with an inner cylinder that press-supports the seal rubber and the seam seal in the axial direction of the cable.   5. The optical cable connection closure according to claim 3 or 4, wherein the optical cable gripping tool provided in the optical cable insertion hole has an elastic member having an arc-shaped inscribed surface pressed against the outer periphery of the optical cable. A pair of strips are connected to each other so as to be openable and closable around the support shaft, and are equipped with a clamp that connects the free ends of both gripping pieces so as to be able to come in contact with and away from each other. An optical cable connection closure characterized by having a configuration. The optical cable connection closure according to claim 1 or 2, wherein the intermediate sleeve is provided with an optical cable insertion hole side by side, and the branch optical cable insertion hole is spaced on one side or both sides of the main optical cable insertion hole. placing deployed, optical cable connecting closure, characterized in that the main optical cable to the optical cable insertion hole and fitted with removable caps via a seal spacer. 7. The optical cable connection closure according to claim 6, wherein the intermediate sleeve includes a ground connection plate that secures ground connection between the left and right optical cable grippers, and has a spring function portion at a contact portion of the ground connection plate. optical cable connecting closure, characterized in that the spring function portion by inserting the optical cable gripper was disengagement-prevention structure engaged with the groove of the optical cable gripping tool.   8. The optical cable connection closure according to claim 5, wherein the intermediate sleeve is capable of swinging a buckle arm on an arm receiving portion provided at a distance in the vicinity of the opening edge of the upper and lower sleeves. Provided with a buckle having a buckle lever at one end of the buckle arm, and the buckle lever engages and disengages an operating point of the buckle lever with an engaging portion formed on an upper sleeve and a lower sleeve over the upper and lower surfaces of the intermediate sleeve. A closure for connecting an optical cable, characterized in that the upper sleeve and the lower sleeve can be freely connected to and released from the intermediate sleeve. 9. The optical cable connection closure according to claim 8, wherein the fixture for mounting and supporting the optical cable core housing article includes a mounting bar for installing the optical cable core housing case, and a stopper slidably mounted on the bar. A closure for connecting an optical cable, characterized in that the stopper is slid and aligned and held in accordance with the number of optical cable core storage cases.

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