JP6979301B2 - Closure for optical cable connection - Google Patents

Description

The present invention is used for relay connection of an optical cable having an optical fiber core wire, and particularly relates to an optical cable connection closure for fictitious installation for relay connection of an overhead wire.

Generally, when connecting a cable such as an optical cable, the cable core is connected using various connection members, and the connector or the like is protected by a closure. It is desired that such a closure has easy access to the core wire connection portion and has good workability. In addition, when working in a fictitious manner, the stability of the work space and the posture of the closure is also important.

For example, like the optical fiber connection closure of Patent Document 1, the core wire connection tray and the core wire passage tray are rotatably attached to the closure, and a device is made to make it easier to secure a work space. There is.

Japanese Unexamined Patent Publication No. 2013-113925

However, since the closure as in the invention of Patent Document 1 is a fictitious work, not only the work space is secured, but also the optical cable core wire is broken if the worker cannot work in a stable posture. It can cause it. In the invention of Patent Document 1, there is room for improvement in terms of work stability.

The present invention has been made in view of the above-mentioned problems, the wiring form of the optical cable core wire is easy to organize, the connection portion and the core wire extra length are efficiently stored, and fictitious construction and maintenance inspection work can be performed. The purpose is to provide a closure for optical cable connection that is safe, reliable and easy, and that can be performed very easily even with additional branching work.

The present invention solves the above-mentioned problems, and the invention of claim 1 is for connecting a core wire for accommodating a frame and a connecting portion between an optical cable core wire on the upstream side and an optical cable core wire on the downstream side. A fictitious optical cable connection closure having a tray and a tray storage unit in which a plurality of core wire connection trays are stacked in the horizontal direction and each of them is pulled out in one direction and then stored so as to be rotatable. The tray storage portion is provided on the frame so as to be rotatable toward the work space by a predetermined angle , the tray storage portion has a lock mechanism for rotational operation, and the lock mechanism is bent. It is an optical cable connection closure characterized by having a knob for locking and unlocking, and a stopper for preventing damage to the knob.

The invention according to claim 2 is characterized in that the tray accommodating portion is locked in the vicinity of the bottom by a pair of shaft stoppers formed on the frame and rotates around the shaft stopper. Item 1 is the closure for connecting an optical cable.

Further, in the third aspect of the present invention, the optical cable core wire is protected by a spiral sleeve in a predetermined range, and each spiral sleeve is formed on a fixing portion having a semicircular cross section formed on a spiral fixing component provided on the frame. The closure for optical cable connection according to claim 1 or 2 , wherein the closure is fitted, held and fixed.

The invention of claim 4 is characterized in that the closure for connecting an optical cable is provided with a workbench for mounting the drawn tray for connecting the core wire and performing the work. The closure for connecting an optical cable according to any one of 3.

The invention of claim 5 is a closure for optical cable connections, according to claim 1-4, characterized in that the hold core wire accommodating sheet for temporarily holding the cable core that is not connected is provided The closure for connecting an optical cable according to any one of the items.

The invention according to claim 6 is the closure for connecting an optical cable according to claim 3 , wherein the spiral fixing component is provided with a TM gripping tool for a cable for gripping and fixing the tension member of the optical cable.

In the optical cable connection closure of the present invention, the tray storage unit is arranged on the frame so that the tray storage unit can rotate at a predetermined angle toward the work space, so that the tray storage unit can be tilted during work to grasp the entire tray for connecting a plurality of core wires. Therefore, it is possible to secure a fictitious work space, connect the optical cable core wire, and select the tray for connecting the core wire to be worked on safely and surely. Also, for connecting the core wire with the tray storage part tilted. If the tray is pulled out to the work space side and rotated before the work is performed, the line of sight of the operator and the tray for connecting the core wire can be stably faced to each other, and the optical cable can be reliably grasped while grasping the entire tray for connecting the core wire. There is an advantage that the core wire connection work can be performed. Further, the tray storage portion has a lock mechanism for rotational operation, and the lock mechanism is characterized by having a knob for locking and unlocking by bending and a stopper for preventing damage to the knob. The tray storage unit can be rotated safely and securely by the mechanism, and since it has a stopper for preventing damage to the knob, damage can be prevented by the stopper even if the knob is accidentally gripped too strongly. .. Especially when the work is fictitious, there is a possibility that the force is unintentionally adjusted, but the stopper can prevent damage.

Further, in the invention of claim 2, since the tray storage portion is configured to rotate around a pair of shaft stoppers formed on the frame, the tray storage portion can be reliably and compactly rotated with a simple structure. There is an advantage that it can be moved.

Further, in the invention of claim 3 , each optical cable core wire is protected by a spiral sleeve in a predetermined range, and each spiral sleeve is fitted into a fixing portion having a semicircular cross section formed on a spiral fixing component provided on the frame. Since it is characterized by being combined, held and fixed, the protection of the core wire is ensured by protecting the exposed portion of the optical cable core wire in the closure with a spiral sleeve. Further, since the spiral sleeve is held and fixed by the spiral fixing component, it is possible to reduce entanglement during work and misselection of the core wire.

Further, in the invention of claim 4, the closure for connecting an optical cable is characterized in that a working table for placing a drawn core wire connecting tray and performing work is provided, so that the pulled out core is provided. Since the wire connection tray can be firmly placed and fixed on the work table for work, branching work can be performed safely and reliably.

Further, in the invention of claim 5, since the closure for connecting an optical cable is provided with a holding core wire storage sheet for temporarily holding the core wire of an optical cable that is not connected, the core wire having been connected is completed. Since the reserved core wire can be securely divided and stored, it is easy to distinguish the core wire and it can be organized without cluttering, and work such as connection work and maintenance inspection can be performed.

Further, in the invention of claim 6 , since the spiral fixing component is provided with a TM gripping tool for a cable for gripping and fixing the tension member of the optical cable, the tension member is fixed more reliably. Work can be done safely without imposing a load on the core wire and cable.

It is a figure in the state which the cover member was removed in one Embodiment of the closure for optical cable connection of this invention, (a) is a front view, (b) is a plan view, (c) is a right side view. It is a figure of the state which attached the cover member in one Embodiment of the closure for optical cable connection of this invention, (a) is a front view, (b) is a right side view. It is a figure which showed the rotating state of the tray storage part of this invention, (a) is the figure in the state which was rotated and opened in the normal state, (c) is the perspective view of the state which was rotated. be. It is a figure of the lock mechanism provided in the tray storage part in this embodiment, (a) is the bottom view, (b) and (c) are the figure which shows the unlocked state. It is a figure of one Embodiment of the core wire connection tray of this invention, (a) is a plan view, (b) is a perspective view. 5A and 5B are views in a state where the core wire connecting tray is opened, where FIG. 5A is a plan view and FIG. 5B is a perspective view. This is an example of wiring of the optical cable core wire in this embodiment. It is a figure of one Embodiment of the spiral fixing part of this invention, (a) is a front view, (b) is a plan view, (c) is a right side view, (d) is a perspective view of a fixing part. It is a figure of one Embodiment of the TM gripper for a cable attached to a spiral fixing part, (a) is a plan view, (b) is a front view, (c) is a left side view, (d) is a mounting view, (d). e) is a diagram of the tension member fixing procedure, and (f) is a perspective view after fixing. It is a figure of an example of the work table in this embodiment. It is a figure of an example of the holding core wire storage sheet in this embodiment.

Hereinafter, the closure for connecting an optical cable according to the present invention will be described with reference to the drawings. First, with reference to FIGS. 1 and 2, the entire optical cable connection closure 10 of the present embodiment will be described. In this embodiment, the upstream side optical cable is A, the downstream side optical cable is B, the upstream side optical cable core wire is A1, and the downstream side optical cable core wire is B1.
FIG. 1 is a diagram showing a state in which a cover member is removed from one embodiment of the closure 10 for connecting an optical cable of the present invention, and FIG. 2 is a diagram showing a state in which a cover member is attached.

The optical cable connection closure 10 has a tray storage unit 30 in which a core wire connection tray 31 is housed in a plate-shaped frame 20 as a base and is rotatable, a spiral fixing part 50 for fixing a spiral sleeve C for protecting the core wire, and a connection. A front cover to which a holding core wire storage sheet 70 that can store and store unreserved core wires together, cable gripping portions 22, 23, and 24 for gripping the optical cable to be introduced and derived are attached, and the exterior is a cover member. It is covered by 11 and the back cover 12 so as to have a dust-proof and drip-proof structure, and becomes a closure for fictitious installation for connecting the cable core wire A1 of the upstream optical cable A and the cable core wire B1 of the downstream optical cable B. ing.

Next, the frame 20 is fixed and suspended by a clamp to a support D having a plate shape and an upper portion is overheaded, and according to FIG. 1A, for introducing the upstream side optical cable A on the left side surface side of the frame 20. The cable gripping portion 22 and the cable gripping portions 23 and 24 for gripping the downstream side optical cable B led out to the right side surface side are provided. In this embodiment, the structure is such that two downstream optical cables B can be attached, but the structure is not limited to this, and one may be attached. Further, the configurations of the upstream side and the downstream side may be reversed.

Further, as shown in FIG. 1 (c), the frame 20 is provided with a fixed base 21 for rotatably attaching the tray storage portion 30 to the front surface (front surface according to FIG. 1) on the work space side, and the fixed base 21 is provided. A pair of shaft stop portions 21a are provided in the vicinity of the tip of the tray so as to support and rotate the vicinity of one side of the tray storage portion 30 on the side far from the frame. The fixed base 21 is provided with a lock portion 21b for fitting a lock mechanism 40 provided in the tray storage portion 30 for releasing and locking the rotation.

As shown in FIGS. 1 and 3, the tray storage unit 30 is formed by stacking a plurality of trays for connecting core wires of FIGS. 5 and 6 in the horizontal direction so that each of them can be rotated after being pulled out upward. It has a structure for accommodating, and supports and rotates near one side of the shaft stop portion 21a of the frame 20 and the bottom of the tray accommodating portion 30 on the side far from the frame. By stacking a plurality of core wire connecting trays 31 in the horizontal direction, a large number of trays can be stored while keeping the total height of the closure low.

In this embodiment, when the lock mechanism 40 is released, the tray storage portion 30 rotates so as to be tilted by about 25 ° toward the front side, which is the work space. The connection status of the optical cable core wire and the selection of the core wire connection tray 31 to be worked on can be safely and reliably performed, and the core wire connection tray 31 is moved to the work space side with the tray storage portion 30 tilted. If the work is performed after the drawer is rotated, the line of sight of the operator and the core wire connection tray 31 can be stably faced to each other, and the optical cable core wire connection work can be performed reliably while grasping the entire core wire connection tray 31. It can be performed.

The shaft stop portion 21a of the frame 20 is configured to support the vicinity of one side of the bottom of the tray storage portion 30 on the side far from the frame, but the present invention is not limited to this, and the rotation is supported by supporting the vicinity of one side on the side close to the frame. It may be a moving configuration.

When the core wire connecting tray 31 slides upward along the rail member provided in the tray storage portion 30 and is pulled out to the end of the rail member, the core wire connecting tray 31 becomes rotatable toward the work space side. Tilt it about 90 degrees, open the core wire connection tray 31 as shown in FIG. 6, and perform the core wire connection work. When pulling out the core wire connection tray 31 stored on the front side of the tray storage unit 30 as shown in FIGS. 9 (d) and 9 (e), the work table 60 is attached to the tray storage unit 30 and the tray 31 is attached to the tray storage unit 30. When the work is performed by placing it on a table and pulling out the core wire connection tray 31 on the back side (frame 20 side), the upper surface of the core wire connection tray 31 arranged on the other work space side is used instead of the work table. It is also possible to place and work.

The lock mechanism 40 is provided on both side surfaces of the tray storage portion 30 as shown in FIG. The lock is not released by operating only one side, and the lock can be released only by operating both sides. The structure of the lock mechanism 40 consists of a knob for locking and unlocking by bending and fitting to the lock portion 21b provided on the fixed base 21 of the frame 20, and the knob is excessively bent as shown in FIG. 4 (c). A stopper is provided to prevent damage due to.

As shown in FIG. 8, the spiral fixing component 50 is provided with a plurality of vertically arranged fixing portions 51 having a semicircular cross section for fitting and fixing the spiral sleeves C one by one. Since the optical cable connection closure 10 has a configuration in which a predetermined upstream side optical cable core wire A1 is pulled out from the upstream side optical cable A and connected to the downstream side optical cable core wire B1 in the core wire connection tray 31, the upstream side as shown in FIG. From the cable grip portion 22 which is the introduction part of the optical cable A to the core wire connection tray 31, and from the cable grip portion 22 and the cable grip portion 23 to which the downstream optical cable B is fixed to the core wire connection tray 31. Since the cable core wire is exposed inside the closure, the spiral sleeve C, which is a protective tube, is wrapped around the cable to protect it.

Therefore, if the wound portion of the spiral sleeve C is not fixed, the plurality of spiral sleeves C may be entangled or the sorting work may be complicated, and the core wire may be torn in some cases. Therefore, the above-mentioned problems can be solved by fitting and fixing each spiral sleeve C to the fixing portion 51 of the spiral fixing component 50.

Further, a cable TM gripping tool 52 for gripping and fixing the tension members of the optical cables A and B can be attached to the spiral fixing component 50. As shown in FIG. 9, the cable TM gripper 52 has a hole 52a for inserting a tension member formed on the side surface of a cylindrical shape, and as shown in FIG. 9E, a screw is formed from a screw hole formed in the upper part after inserting the tension member. The structure is such that the tension member can be sandwiched between the bottom of the screw and the gripping tool and gripped and fixed. By fixing the tension member, it is possible to work more reliably and safely without applying a load to the core wire and the cable.

As shown in FIG. 9, the work table 60 is a table on which the core wire connecting tray 31 is placed. It is attached so as to be about 90 ° with respect to the front upper side wall of the tray storage portion 30 by using the fitting portion 61 provided on the work table 60. As a method of use, as shown in FIGS. 9 (d) and 9 (e), it is used when connecting the core wire connecting tray 31 stored on the front side of the tray storage unit 30, and for connecting the core wires. Stable work can be performed by pulling out the tray 31, rotating it, placing it on the work table 60 and opening it. The workbench 60 may be provided in advance on the optical cable connection closure 10, or may be attached only when the operator needs to carry it with a work tool or the like.

The holding core wire storage sheet 70 is provided on the back side of the frame 20 as shown in FIGS. 1 and 10, and is a box-shaped container having an open side that can store and store the holding core wires that are not connected together. The open surface is covered so that two flexible resin sheets 71 and 72, as shown in FIGS. 10 (a) and 10 (b), overlap each other. As a result, the reserved core wire can be efficiently separated and stored, and since a resin sheet having flexibility is used when taking out the core wire, it can be easily taken out without damaging the core wire by bending it.

The closure for connecting an optical cable according to the present invention can stably connect core wires, and is suitable for a fictitious work site where the latest attention must be paid to the protection and handling of core wires. It can be used and the manufacturing cost can be suppressed.

A Upstream optical cable B Downstream optical cable A1 Upstream optical cable core B1 Downstream optical cable core C Spiral sleeve D Support 10 Optical cable connection closure 11 Front cover 12 Back cover 20 Frame 21 Fixed base 21a Shaft branch 21b Lock part 22 ~ 24 Cable gripping part 30 Tray storage part 31 Tray for connecting core wire 40 Lock mechanism 41 Knob 42 Stopper 50 Spiral fixing part 51 Fixing part 52 TM gripping tool for cable 60 Worktable 61 Fitting part 70 Holding core wire storage sheet 71 Made of resin Sheet 72 Resin sheet

Claims (6)

With the frame
A tray for connecting the core wire for accommodating the connection portion between the optical cable core wire on the upstream side and the optical cable core wire on the downstream side,
A tray storage unit in which a plurality of trays for connecting core wires are stacked in the horizontal direction and each of them is pulled out in one direction and then stored so as to be rotatable.
Is a fictitious optical cable connection closure with
The tray storage unit is arranged on the frame so as to be rotatable toward the work space by a predetermined angle , the tray storage unit has a lock mechanism for rotational operation, and the lock mechanism is bent to lock and unlock. An optical cable connection closure characterized by having a knob to be used and a stopper for preventing damage to the knob. The closure for optical cable connection according to claim 1, wherein the tray storage portion is locked in the vicinity of the bottom by a pair of shaft stoppers formed on the frame and rotates around the shaft stopper. .. Each of the optical cable core wires is protected by a spiral sleeve in a predetermined range, and each spiral sleeve is fitted and held and fixed by a fixing portion having a semicircular cross section formed on the spiral fixing component provided on the frame. The closure for optical cable connection according to claim 1 or 2. The closure according to any one of claims 1 to 3 , wherein the closure for connecting an optical cable is provided with a work table on which the drawn out tray for connecting the core wire is placed and the work is performed. Closure for optical cable connection. The optical cable connection according to any one of claims 1 to 4 , wherein the closure for connecting an optical cable is provided with a holding core wire storage sheet for temporarily holding an optical cable core wire that is not connected. Closure for. The closure for connecting an optical cable according to claim 3 , wherein the spiral fixing component is provided with a TM gripping tool for a cable for gripping and fixing the tension member of the optical cable.

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