JP7314038B2 - Optical Cable Connection Closure Outer Replacement Cable Transfer Tool - Google Patents

Description

The present invention relates to tools used in replacing optical cable connection closure sheaths, which are mainly used in underground sections.

Since the 1980s, optical communication using optical cables has become widespread, and closures for connecting optical cables have been improved year by year, and their durability, workability, and structural optimization have led to compactness. For example, the optical cable connection closure of Patent Document 1 filed by the applicant of the present application was, at the time, a closure that could easily connect and switch optical cables and core wires or branch and connect them without adversely affecting the transmission characteristics of the optical cables, facilitate expansion, and accommodate the extra length of the core wires and the core wire connection part in a very compact manner.

JP-A-2001-42134 JP 2010-169969 A JP 2019-15759 A

The optical cable connection closure of Patent Document 1 is a very good invention, but the watertight structure is complicated, and when opening and closing work is required many times during maintenance, etc., the rubber packing used in the watertight structure may be submerged due to deterioration in performance or deformation due to deterioration over time.

In this way, the closure of Patent Document 1, which had an excellent structure at the time, has been improved and a completely new structure has been proposed.

For example, as in the optical cable connection closure of Patent Document 2 filed by the applicant of the present application, there is an increasing demand for replacement with a closure that has an outer sleeve that is divided into three parts, upper, middle and lower, and that the cable introduction port is concentrated in the middle sleeve, thereby improving safety and watertightness, and improving the efficiency of wiring work for optical cables and core wires, and enabling uniform construction without skills.

When replacing the closure sheath, it is desirable to replace without modifying the storage section in which the core wires and the like that have already been connected are stored. This is because, due to the materials and characteristics of the optical cable and the core wires, it is better not to change the positional relationship of the connected core wires as much as possible so that the core wires are not damaged or the curvature is changed, and the closure exterior replacement work can be performed safely without the troublesome work of cutting and extending the core wires.

Here, a closure has been invented that can be easily relocated when an existing closure is relocated, such as the exterior replacement closure of Patent Document 3. The closure of Patent Literature 3 has a configuration in which relocation work can be performed without changing any interior parts such as a storage portion in which core wires and the like are stored.

However, although the exterior replacement closure of Patent Document 3 is a very effective configuration when the interior parts are relocated without changing the positional relationship at all, it has the disadvantage that fine position adjustment cannot be made when the position of the internal structure is changed due to improvement of the closure or the like. In particular, when changing the position of the optical cable, there is a possibility that a new work, such as a work for extending the core wire, that does not place a burden on the cable and the core wire will be required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cable moving tool for exchanging a closure sheath for connecting an optical cable, which enables fine positional adjustment without imposing a burden on the core wires or the like, and which can replace the closure sheath.

The present invention has solved the above-mentioned problems, and the invention of claim 1 is a tool for replacing the exterior of an existing optical cable connection closure, comprising: a tool fixing part for fixing the tool to the optical cable connection closure body; a first cable gripping part having a gripping part for fixing the optical cable at a predetermined position; A cable moving tool for replacing a closure exterior for optical cable connection, characterized in that is provided with

According to a second aspect of the present invention, there is provided a cable moving tool for exchanging a closure exterior for optical cable connection according to the first aspect, wherein the gripping portion of the second cable gripping portion grips the optical cable so as to be slidable about an axis.

According to a third aspect of the present invention, there is provided a cable moving tool for exchanging a closure exterior for optical cable connection according to the first or second aspect, characterized in that the first cable gripping portion is slidable in a horizontal direction perpendicular to the axial direction of the optical cable.

According to a fourth aspect of the present invention, there is provided a cable moving tool for replacing an optical cable connection closure exterior according to any one of claims 1 to 3, wherein a replacement frame is attached to the optical cable connection closure main body, and the optical cable connection closure exterior replacement cable moving tool is fixed to the optical cable connection closure main body by the tool fixing portion via the replacement frame.

According to a fifth aspect of the present invention, there is provided a cable moving tool for replacing the outer covering of the optical cable connecting closure according to the fourth aspect, wherein the remounting frame serves as a main frame of the closure after the outer covering of the optical cable connecting closure is replaced.

The invention of claim 6 is the cable moving tool for replacing the closure exterior for optical cable connection according to any one of claims 1 to 5, wherein the gripping portion of the first cable gripping portion and the gripping portion of the second cable gripping portion are provided with tightening dials for tightening and fixing the optical cable.

According to a seventh aspect of the present invention, the tool fixing portion has a spring-biased hook shape, and is fixed by being latched by the hook-shaped portion.

A cable moving tool for exchanging an optical cable connection closure exterior according to the present invention is a tool for exchanging the exterior of an existing optical cable connection closure, and is provided with a tool fixing portion for fixing the tool to an optical cable connection closure main body, a first cable gripping portion having a gripping portion for fixing an optical cable at a predetermined position, and a second cable gripping portion having a gripping portion for gripping an optical cable at one end and a rotation shaft for rotating around the axial direction of the optical cable at the other end. Therefore, not only is it possible to perform the replacement work safely and reliably without imposing a burden on the optical cables, but in particular, in the replacement work from the existing closure in which the optical cables are arranged at different heights in the upper and lower two stages to the closure arranged in one stage, when the second cable gripping part rotates the upper optical cable while it is gripped and moves downward to a predetermined position to change the height, the replacement work can be performed safely by greatly reducing the burden on the core wires.

According to a second aspect of the present invention, the gripping portion of the second cable gripping portion grips the optical cable so as to be slidable about an axis. Since the cable moving tool for exchanging the exterior of the optical cable connection closure according to the first aspect is characterized in that, if the optical cable rotates in a state in which it is completely fixed without sliding on the gripping portion, the optical cable will normally be twisted and there is a high possibility of adversely affecting the internal core wires such as disconnection. By slidably gripping the portion, the position including the height can be adjusted without twisting the optical cable.

Further, according to the invention of claim 3, the first cable gripping part is slidable in a horizontal direction perpendicular to the axial direction of the optical cable. The optical cable connecting closure exterior replacement cable moving tool according to claim 1 or 2 is characterized.

Further, according to the invention of claim 4, a replacement frame is attached to the optical cable connection closure body, and the optical cable connection closure exterior replacement cable moving tool is fixed to the optical cable connection closure body by the tool fixing portion via the replacement frame.

Further, according to the invention of claim 5, the remounting frame becomes a main frame of the closure after the outer covering of the optical cable connection closure is replaced. With the cable moving tool for replacing the outer covering of the optical cable connection closure according to claim 4 , there is no need to bother to remove the remounting frame after completion of the replacement work, and the working efficiency can be greatly improved.

Further, according to the invention of claim 6, the gripping portion of the first cable gripping portion and the gripping portion of the second cable gripping portion are provided with tightening dials for tightening and fixing the optical cable. The optical cable connection closure exterior replacement cable moving tool according to any one of claims 1 to 5 is characterized in that the cable can be gripped and tightened safely and securely even in a narrow work space.

Further, according to the invention of claim 7, the tool fixing portion has a spring-biased hook shape, and is fixed by being hooked by the hook-shaped portion. Since the optical cable connection closure exterior replacement cable moving tool according to any one of claims 1 to 6, there is an advantage that it can be hooked by the spring bias at the stage of temporary fixing at the start of work.

1 is an overall view of one embodiment of a cable moving tool of the present invention, (a) is a front view, (b) is a left side view, (c) is a plan view, and (d) is a perspective view. FIG. 2 is a view of the gripping portion of one embodiment of the cable moving tool of the present invention, in which the second gripping portion is opened, (a) is a front view, (b) is a right side view, (c) is a plan view, and (d) is a perspective view. 1 is a view of a grip portion of an embodiment of a cable moving tool of the present invention, in which a second grip portion is closed, (a) is a front view, (b) is a right side view, (c) is a plan view, and (d) is a perspective view. FIG. 2 is a diagram showing a state in which the cable moving tool of the present invention is folded by a folding switch provided on an arm portion, (a) is a front view, (b) is a left side view, (c) is a plan view, and (d) is a perspective view. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the frame for remounting of this invention, (a) is a front view, (b) is a left view, (c) is a top view, (d) is a perspective view. 1 is a photograph of each part of the cable moving tool of the present invention, where (a) is the tool fixing hook of the tool fixing part, (b) is the cable gripping part of the first gripping part, (c) is the cable gripping part of the second gripping part, and (d) is the slide handle. It is a figure which shows the procedure of left-right switching of the holding part of the cable moving tool of this invention. It is a figure which shows the cable connection state of the existing closure for optical cable connection, (a) is a front view, (b) is a left view, (c) is a top view, (d) is a perspective view. FIG. 10 is a diagram showing a state in which the replacement frame is attached to the existing optical cable connection closure, (a) is a front view, (b) is a left side view, (c) is a plan view, and (d) is a perspective view. FIG. 10 is a diagram showing a state in which a cable moving tool is attached to the transfer frame of FIG. 9, (a) is a front view, (b) is a left side view, (c) is a plan view, and (d) is a perspective view. FIG. 11 is a diagram showing a state in which the second grip portion of the cable moving tool of FIG. 10 is opened and moved to the same height as the first grip portion, (a) is a front view, (b) is a left side view, (c) is a plan view, and (d) is a perspective view. It is a figure which shows the cable connection state after completion of replacement|exchange to a new type optical cable connection closure, (a) is a front view, (b) is a left side view, (c) is a top view, (d) is a perspective view.

Hereinafter, a cable moving tool for replacing an outer packaging of an optical cable connecting closure according to the present invention will be described with reference to the drawings. FIG. 1 is an overall view of an embodiment of the cable moving tool, FIG. 2 is a view of the gripping portion of the cable moving tool with the second gripping portion open, FIG. 3 is a view of the gripping portion of the cable moving tool with the second gripping portion closed, FIG. 8 shows the cable connection state of the existing optical cable connection closure, FIG. 9 shows the state in which the replacement frame is attached to the existing optical cable connection closure, FIG. 10 shows the state in which the cable moving tool is attached to the replacement frame in FIG. 9, FIG. It is a figure which shows the cable connection state after completion of replacement.

In this embodiment, the cable moving tool 10 is a tool in which one end of an arm 40 supports two first gripping portions 20 and a second gripping portion 30 and a tool fixing portion 50 is connected to the other end of the arm 40 .
The cable moving tool 10 is installed on the frame 121 of the storage part 120 of the existing optical cable connection closure 100 via the replacement frame 60, and is a tool that can be replaced (replaced) with the new type optical cable connection closure 200 while protecting the already wired optical cables and core wires around the storage part 120. - 特許庁

The second gripping portion 30 is rotatable about the axial direction of the optical cable gripping the rotating shaft 32 , and the height and position of the clamp 31 can be changed. Thus, in a closure in which optical cables are arranged in two upper and lower stages, there is an excellent advantage that the arrangement of two upper and lower stages can be changed to one stage by changing the height and position of the optical cable in the upper stage.

Portions of the cable displacement tool 10 will now be described with particular reference to FIGS. 1-7.
In this embodiment, two of the first gripping portions 20 are provided so as to form a left-right pair as shown in FIG. 1(a). This can be changed depending on the number of cables in the existing optical cable connection closure. As shown in FIGS. 1 and 6B, the first gripping portion 20 is provided with a clamp 21 for gripping the optical cable, and a dial 22 is used to open and close the clamp 21 to grip the optical cable. Further, when it is desired to further tighten, a retightening hole 23 that can be retightened with a hexagonal wrench is used.

The second gripping portion 30 is a gripping portion for changing the height and position of the upper optical cable in a closure in which the optical cables are mainly arranged in two stages, and is arranged so as to be aligned with the first gripping portion 20 as shown in FIG. The second gripping portion 30 has a clamp 31 (gripping portion) at one end and a rotating shaft 32 at the other end. FIG. 2 shows a state in which the second grip portion 30 is opened, and FIG. 3 shows a state in which the second grip portion 30 is closed. The length is adjusted so that when opened, it has the same height as the cable of the first grip part 20 and the same width as the optical cable lead-in hole of the new type closure. In the closed state, the existing optical cable connection closure 100 is at a position where the upper optical cable can be gripped.

A clamp 31 for gripping the optical cable is provided at one end of the second gripping portion 30, and the clamp 31 is opened and closed by a dial 34 to sandwich the optical cable. Further, the dial 34 is also provided with a tightening hole as shown in FIGS. 1 and 6(c), and can be tightened with a hexagonal wrench when further tightening is desired. A sliding portion 33 is provided at the contact portion of the inner wall of the clamp with the optical cable. When the second gripping portion 30 grips the optical cable and rotates about the rotating shaft 32, if the optical cable is completely fixed and rotated, the optical cable may be twisted and the core wire may be damaged. In this embodiment, the sliding portion 33 is slid by using resin to reduce the frictional force, but it is also possible to slide the optical cable by using bearings or the like.

The first gripping portion 20 and the second gripping portion 30 can be horizontally reversed by removing the switching screw 11 . Referring to FIGS. 1A and 7, in this embodiment, the second gripping portion 30 is provided on the right side, but depending on the closure and wiring conditions, work may not be possible without the second gripping portion 30 on the left side. As a result, the replacement work can be performed even if two second gripping portions 30 are not provided, which contributes to ensuring work space and reducing the number of tool parts.

The arm 40 has a first gripping portion 20 and a second gripping portion 30 at one end, and a tool fixing portion 50 at the other end. The arm 40 is used to adjust the height of the distance between the tool fixing portion 50 and the gripping portion. As shown in FIG. 10, the gripping portion can be arranged by combining the horizontal arm and the vertical arm in a position that facilitates replacement of the closure and does not apply an excessive load such as bending to the cable.

Further, the arm 40 is composed of horizontal and vertical arms, and a folding switch 41 is provided at the connecting portion so that the arm 40 can be folded as shown in FIG. This contributes to space reduction during transportation.

The tool fixing portion 50 is for fixing the first gripping portion 20 and the second gripping portion 30 to the existing optical cable connection closure 100 via the arm 40. In this embodiment, the mounting frame 60 is attached to the frame 121 to which the storage portion 120 is attached, and the tool fixing portion 50 is fixed to the cable moving tool setting portion 61 of the mounting frame 60.

The tool fixing portion 50 is provided with a pair of tool fixing hooks 51 on one side of the table as shown in FIG. 1, and an arm 40 is attached to the other side of the table via a sliding handle 52 so as to be slidable to the left and right as shown in FIGS. 1(a) and 6(d). This makes it possible to easily adjust the position of the gripping portion.

As shown in FIG. 6A, the tool fixing hook 51 has a spring-loaded plate member 51b attached to the inner wall of a substantially U-shaped hook-shaped member 51a. Thereby, the tool can be fixed more simply.

The remounting frame 60 has a shape as shown in FIG. 5, and is attached to the frame 121 to which the housing portion 120 of the existing optical cable connection closure 100 is fixed. Since the transfer tool setting portion 61 is provided on the transfer frame 60, the tool fixing portion 50 can be fixed by using the moving tool setting portion 61, and the cable moving tool 10 can be operated more safely and easily.

Further, the remounting frame 60 has a shape capable of serving as a frame of the new type optical cable connection closure 200 after completion of the closure replacement work, so that it does not need to be removed when the work is completed, and a more robust closure can be constructed.

Next, a procedure for exchanging (retrofitting) the existing optical cable connection closure 100 with the new optical cable connection closure 200 will be described with reference to FIGS. 8 to 12. FIG.
FIG. 8 shows the existing optical cable connection closure 100 before the replacement work. In this embodiment, the closure has a structure in which a lower optical cable A and an upper optical cable B are installed in two stages, upper and lower. This will be replaced with the new optical cable connection closure 200 in which the optical cables are arranged in one row.

The exterior 110 and the cable grip portion 130 are replaced, and the existing storage portion 120 and the frame 121 to which the storage portion 120 is fixed are used even after the replacement. The cable-moving tool 10 of this embodiment is a tool that can be replaced without touching the housing portion 120 as much as possible. There are many parts that do not require processing such as cutting or extending the core wire, which greatly improves work efficiency. Also, safety is improved.

FIG. 9 is a diagram showing a state in which the exterior 110 of the existing optical cable connecting closure 100 is removed and the replacement frame 60 is attached to the cable gripping portion 130 . A cable moving tool installation portion 61 is provided on the upper surface near the cable grip portion 130 .

FIG. 10 is a diagram showing a state in which the cable moving tool 10 is attached to the cable moving tool installation portion 61. As shown in FIG. As shown in FIG. 10, the positional relationship of the cable moving tool 10 is such that the tool fixing portion 50 is arranged on the inside and the first and second holding portions 20 and 30 are arranged on the outside so as to sandwich the cable holding portion 130 . After the first gripping part 20 and the second gripping part 30 grip the lower optical cable A and the upper optical cable B, respectively, the cable gripping part 130 is removed. In this state, the second gripping part 30 grips the upper optical cable B arranged in the upper stage in a closed state.

In FIG. 11, after the cable gripping portion 130 is removed, the second gripping portion 30 is opened about the rotating shaft 32, and the upper optical cable B is moved to the same height as the lower optical cable A of the first gripping portion 20 and the same width as the optical cable lead-in hole of the new type closure. The clamp 31 of the second gripping portion 30 is provided with a sliding portion 33. When the second gripping portion 30 grips the optical cable and rotates about the rotating shaft 32, the optical cable may be twisted and the core wire may be damaged if the optical cable is completely fixed and rotated.

FIG. 12 shows the configuration after the replacement with the new type optical cable connection closure 200 is completed. In the closure of this embodiment, the optical cable inlets are arranged in a horizontal row, and the construction is such that uniform construction can be performed without skill, improving safety, watertightness, and the efficiency of wiring work for optical cables and core wires. By using the replacement frame 60 as the frame of the closure, it is not necessary to remove it when the work is completed, and a more rigid closure can be constructed.

The cable moving tool for replacing the outer packaging of the optical cable connection closure according to the present invention can perform the replacement work safely, securely and speedily while protecting the optical cable and the core wire when replacing (retrofitting) the existing optical cable connection closure with the new closure outer packaging.

A Lower optical cable B Upper optical cable 10 Cable moving tool 11 Switching screw 20 First grip part 21 Clamp 22 Dial 23 Retightening hole 30 Second grip part 31 Clamp 32 Rotating shaft 33 Sliding part 34 Dial 40 Arm 41 Switch for folding 50 Tool fixing part 51 Tool fixing hook 52 Handle for sliding 53 Pitch for pinching Space 60 Replacement frame 61 Cable moving tool installation part 100 Existing optical cable connection closure 110 Closure exterior 120 Storage part 121 Frame 130 Cable grip part 200 New type optical cable connection closure 210 Closure exterior

Claims (7)

A tool for replacing the exterior of an existing optical cable connection closure, comprising:
a tool fixing part for fixing the tool to the optical cable connection closure body;
a first cable gripping portion having a gripping portion for fixing the optical cable in place;
a second cable gripping portion having a gripping portion for gripping an optical cable at one end and a rotation shaft rotating about the axial direction of the optical cable at the other end;
A cable moving tool for replacing a closure sheath for connecting an optical cable, characterized by comprising: 2. The cable moving tool for exchanging a closure exterior for optical cable connection according to claim 1, wherein said gripping portion of said second cable gripping portion grips said optical cable so as to be slidable about an axis. 3. The cable moving tool for replacing the outer packaging of the optical cable connecting closure according to claim 1, wherein the first cable gripping portion is slidable in a horizontal direction perpendicular to the axial direction of the optical cable. 4. The optical cable connection closure exterior replacement cable moving tool according to claim 1, wherein a replacement frame is attached to the optical cable connection closure body, and the optical cable connection closure exterior replacement cable moving tool is fixed to the optical cable connection closure body by the tool fixing portion via the replacement frame. 5. A cable moving tool for exchanging a closure sheath for optical cable connection according to claim 4, wherein said remounting frame serves as a main frame of said optical cable connection closure after exchanging the sheath. 6. The cable moving tool for replacing a closure exterior for optical cable connection according to any one of claims 1 to 5, characterized in that the gripping portion of the first cable gripping portion and the gripping portion of the second cable gripping portion are provided with tightening dials for tightening and fixing the optical cable. 7. The cable moving tool for exchanging a closure exterior for optical cable connection according to claim 1, wherein the tool fixing portion has a spring-biased hook shape, and is fixed by being latched by the hook shape portion.

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