JPH1010331A - Optical fiber cable connection point temporary waterproof guard tool and its receptive hardware - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical fiber cable connection point temporary waterproof guard tool and its receptive hardwares preventing a hit failure and a disconnection failure due to bend/put-in to a coated optical fiber caused by an artificial and structural factor. SOLUTION: Two semicircular half division cylinder attaching metal fittings are connected detachably, and a circular half division cylinder attaching metal fitting 17 is formed, and the circular half division cylinder attaching metal fitting 17 is detained with internal metal goods 18 of both end standard closures of a coated fiber housing part 19, and a half division cylinder 16 formed by colorless, transparent hard row material is fitted to the outer peripheral surface of the circular half division cylinder attaching metal fitting 17 so as to nearly match with it attachably/detachably, and is made an integral cylindrical body enveloping a switch connection point.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to provisional waterproofing and protection of optical fiber cable connection points in an optical fiber cable switching work, which aims at safe and easy waterproofing after a plurality of days of optical fiber cable connection work. It relates to a tool and its receiving hardware.

[0002]

2. Description of the Related Art Conventionally, when a connection process is performed over a plurality of days in the switching work of an optical fiber cable, after the connection process on that day, the connection point of the optical fiber cable is changed to water / water until the next connection day until the next day. Since it must be protected from dust, it is done with an adhesive waterproof sheet, a moisture-proof mixture and rubber tape.

FIG. 6 is a perspective view showing an adhesive waterproof sheet attached to a conventional optical fiber cable, 1 is an adhesive waterproof sheet, 2 is a rubber tape, 3 is a moisture-proof compound, 4 is an existing optical fiber cable, and 5 is a newly installed optical fiber cable. A fiber cable 6 is an upper optical fiber cable.

[0004] That is, the adhesive waterproof sheet 1 has an adhesive material coated on one side and is covered with a thin cloth. Before use, the thin cloth of about 10 cm on each side is removed, and the optical fiber cable is used. Two sides facing each other in a cylindrical shape are attached so as to wrap the connection point. Then, the adhesive portions of the remaining two sides of the adhesive waterproof sheet 1 are applied to the portions where the moisture-proof mixture 3 has been applied to the jackets of the existing optical fiber cable 4, the new optical fiber cable 5, and the upper optical fiber cable 6, respectively. Later, the rubber tape 2 is used to secure moisture and dust proof. At that time, it was impossible to prevent disconnection failure and instantaneous interruption failure due to artificial and structural pinching of the optical fiber cable core and application of lateral pressure, and workability was not good.

[0005]

In the prior art, the adhesive material of the adhesive waterproof sheet is applied to one side, which is covered with a thin cloth, and the necessary part of the thin cloth is removed before use. Adhere the moisture-proof admixture to the cable jacket and attach the adhesive part from which the thin waterproof adhesive sheet has been removed and tighten it with rubber tape to secure waterproof and dustproof. On the connection day, this adhesive waterproof sheet is cut with a knife and scissors and disassembled. At that time, instantaneous interruption and disconnection failure due to erroneous hooking and cutting of the optical fiber core wire occur. Further, with the adhesive waterproof sheet, the optical fiber core wire cannot be protected from an impact due to external pressure, and workability is not good.

The present invention has been made in view of the above circumstances, and in the waterproofing work of waterproofing work for switching optical fiber cables, bending into optical fiber core wires caused by artificial and structural elements. -An object of the present invention is to provide an optical fiber cable connection point temporary waterproofing protective device and its receiving member that can prevent instantaneous interruption failure and disconnection failure due to pinching and provide a worker with a working environment in which waterproofing can be performed safely and easily. I do.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is a temporary waterproof protective device for a switching connection point in a cable lead-in portion of an optical fiber cable, comprising a semicircular half-split cylindrical mounting bracket. The protrusions of the flat plate are fixed in the direction of the center of the radius from the center inner surface of the center, and T-shaped projections and T-shaped grooves are provided at both ends of the semicircular half-split cylindrical mounting bracket, respectively. The two projections and grooves are engaged with each other to removably connect the two semicircular half-cylinder mounting brackets to form an annular half-cracking cylinder mounting bracket. Locked to the internal hardware of the standard closure at both ends of the wire accommodating section, provided with a U-shaped protrusion in the vertical direction at one end in the outer peripheral direction, and provided a U-shaped groove in the vertical direction at the other end, colorless and transparent The half-cylinder cylinder made of hard material is The U-shaped projections and grooves of the half-cylinder are removably fitted so as to substantially match the outer peripheral surface of the half-cylinder mounting bracket, so as to form an integral cylinder surrounding the switching connection point. It is characterized by having done.

The present invention also provides a temporary waterproofing protective device for a switching connection point in a cable lead-in portion of an optical fiber cable, wherein a semicircular end plate is provided with a circular notch at the center of the diameter or at the periphery thereof. A convex portion is provided at one end of both ends of the diameter, a concave portion is provided at the other end, and screw-type fasteners are fixed around the convex portion and the concave portion, respectively, and the convex portions at both ends of the diameter of the semicircular end face plate are provided. The two semicircular end plates are detachably connected by holding the uncovered portions of the cable jackets at both ends of the switching connection point by fitting the parts and the recesses and fitting the screw type fasteners. Then, an annular end plate is formed, a female fastener is provided on one of the longitudinal ends of both ends of the annular end plate, and a position substantially separated from the other female fastener position on the outer periphery of the annular end plate. A male fastener and a waterproof sheet made of transparent vinyl material. A spring forming substantially the same outer periphery as the annular end face plate by removably connecting both ends of the waterproof sheet with the vertical female fastener and the male fastener so as to substantially match the outer peripheral surface of the annular end face plate. A C-shaped waterproof sheet fixing bracket provided with a type fastener, wherein both ends of the waterproof sheet are detachably fitted to the outer peripheral surface of the annular end face plate.

[0009] In addition, the receiving hardware of each of the optical fiber cable connection point temporary waterproofing protectors according to the present invention is provided with a receiving hardware fixing hole at a substantially central portion of one surface on the outer side of the L-shaped hardware, and the other ends from both ends of the other surface. With a cylindrical member formed in a substantially U-shape provided with a cylinder extending perpendicular to the surface, a flat plate is provided so as to horizontally fix the cylinders at both ends below the tip of the cylinder of one cylindrical member,
The inner diameter of the cylinder of the one cylindrical member is slightly larger than the outer diameter of the cylinder of the other one of the cylindrical members, the cylinders of the two cylindrical members are elastically connected, and the receiving metal fixing hole and the cable receiving metal are connected. Is fixed with a locking pin, a cylindrical fixing hole is provided around the flat plate of the cylinder of the one cylindrical member, the cylinder of the other cylindrical member is locked with bolts, and the two cylindrical members are substantially It is characterized in that it is configured to be formed in a mold shape.

[0010] The present invention provides an instantaneous interruption due to bending or pinching of an optical fiber core that is artificially and structurally generated in a waterproofing operation when a connection point is set in a drawing part of an optical fiber cable switching work. The most important feature is to prevent failure and disconnection failure.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an exploded perspective view showing an embodiment of the present invention, and FIG. 3 is a holder for an optical fiber cable connection point temporary waterproofing protector according to the present invention. FIG. 4 is a perspective view showing an example of FIG.
(A) is a side view showing an example of a transparent half-cylinder mounting bracket according to the present invention, FIG. 4 (b) is a side view showing an example of a transparent half-split cylinder according to the present invention, and FIG. And FIG. 5B is a side view showing another example of the end plate according to the present invention.

In the drawing, 10 is a transparent waterproof sheet, 11 is a female fastener, 12 is a male fastener, 13 is an end plate, 14 is an end plate, 15 is a screw type fastener such as an adjust fastener, and 16 is a transparent half-cylinder. , 17 is a transparent half-cylinder mounting bracket, 18 is an internal hardware of a standard closure, 19 is an optical fiber core housing portion, 20 is an existing optical fiber cable, 21 is a new optical fiber cable, 22 is an upper optical fiber cable, and 23 is Transparent half-split cylindrical fixing magic tape, 24 is a holder for temporary waterproof protective equipment at the optical fiber connection point, 25 is a C-shaped waterproofing sheet fixing fitting with a spring-type fastener, 26 is an optical fiber core, and 27 is a cylinder Member cylinder,
28 is a cylinder of a cylindrical member.

That is, a temporary waterproof protective device for a switching connection point in the cable lead-in portion of the optical fiber cable, wherein the flat-plate protruding portion extends in the direction of the center of the radius from the center inner surface of the semi-circular half-split cylindrical mounting member 17. FIG. 4 is attached to both ends of the semicircular half-cylinder mounting bracket 17.
As shown in (a), a T-shaped projection 30 and a T-shaped groove 31 are provided, and the T-shaped projections 30 and T
The two semicircular half-cylinder mounting brackets 17 are detachably connected by engaging the mold-shaped grooves 31 to form an annular half-cracking cylinder mounting bracket 17. As shown in FIG. 4B, a U-shaped protrusion 32 is provided in the longitudinal direction at one end in the outer peripheral direction, and the U-shaped protrusion 32 is engaged with the internal hardware 18 of the standard closure at both ends of the fiber core wire accommodating portion 19. A U-shaped groove 33 is provided in the vertical direction, and the half-cylinder cylinder 16 formed of a colorless and transparent hard material is formed so that the half-cylinder 16 substantially matches the outer peripheral surface of the annular half-cylinder mounting bracket 17. The U-shaped projection 32 and the U-shaped groove 33 of the split cylinder 16 are detachably fitted to each other to form an integral cylinder surrounding the switching connection point.

As shown in FIGS. 5A and 5B,
Circular cutouts 34, 35, 36 are provided at the center or the periphery of the semicircular end plates 13, 14 at the diameter thereof, a convex portion 37 is provided at one end at both ends of the diameter and a concave portion 38 is provided at the other end. As shown in FIG. 1, screw-type fasteners 15 such as adjust fasteners are provided around the convex portions 37 and the concave portions 38, respectively.
Are fixed, the convex portions 37 and concave portions 38 at both ends of the diameter of the semicircular end face plates 13 and 14 are fitted, and the screw type fastener 15 is fitted. The two semicircular end plates are detachably connected to each other by gripping the uncovered portion of the cable jacket to form annular end plates 13 and 14, and the annular end plates 13 and 14 are attached to both ends. A female fastener 11 is provided on one side in the longitudinal direction, and a male fastener 12 is provided at a position separated from the position of the other female fastener 11 by an outer periphery of the annular end plates 13 and 14, and formed of a transparent vinyl material. Both ends of the waterproof sheet 10 are detachably connected to each other by the female fastener 11 and the male fastener 12 in the vertical direction so that the sheet 10 substantially matches the outer peripheral surfaces of the annular end plates 13 and 14. Springs having substantially the same outer circumference as the end plates 13 and 14 of FIG. Type C-shaped tarpaulin fixture 25 with fasteners, configured to freely fitted removably at both ends of the waterproof sheet 10 on the outer peripheral surface of the ring-shaped end plates 13, 14.

As shown in FIG. 3, the receiving metal fitting 24 of the optical fiber cable connection point temporary waterproof protective gear is provided with a receiving metal fixing hole 39 at a substantially central portion on one outer surface of the L-shaped metal fitting 42.
A cylindrical member formed in a substantially U-shape provided with a cylinder extending perpendicularly to the other surface from both ends of the other surface, and the cylinders at both ends horizontally below the distal end of the cylinder 28 of one cylindrical member. A flat plate 40 is provided so as to be fixed, and the inner diameter of the cylinder 28 of the one cylindrical member is slightly larger than the outer diameter of the cylinder 27 of the other cylindrical member. It is telescopically connected and the receiving metal fixing hole 39 and the cable receiving metal (not shown) are fixed with a locking pin (not shown), and a cylinder is formed around the flat plate 40 of the cylinder 28 of the one cylindrical member. A fixing hole 41 is provided, and the cylinder 27 of the other cylindrical member is locked by a bolt (not shown) inserted into the cylindrical fixing hole 41, so that the two cylindrical members are formed in a substantially rectangular shape. I do.

After completion of the connection of the optical fibers, the transparent half-cylinder 16 is attached to the connection point of the standard closure, and the end plates are provided on the existing optical fiber cable 20 side, the new optical fiber cable 21 and the upper optical fiber cable 22 side. 13 and 14, the transparent waterproof sheet 10 is wound around the end plates 13 and 14 on both sides, and the waterproof fastener 1 is attached.
Structures 1 and 12 are fixed to the outer periphery of the tightened end face plates 13 and 14 by a transparent waterproof sheet fixing bracket 25 to protect the optical fiber from bending, impact, dust, and water droplets until the next optical fiber switching time. The transparent waterproof sheet 10 is opened and closed by the waterproof fasteners 11 and 12 at the next optical fiber core switching day.

Next, due to such a structure, in the switching work of the optical fiber core, the connection point is required to be a necessary length from water droplets, dust and impact until the next optical fiber core switching date. By protecting and opening / closing the waterproof fasteners 11 and 12 on the day of switching, the process can be shifted to the connection process without catching the optical fiber 26. If necessary, the small cylinder 27 of the metal fitting 24 of the optical fiber connection point temporary waterproofing protective gear is replaced with the large cylinder 28.
By deducting the length of the optical fiber cable, the length of the optical fiber cable that requires waterproof protection can be supported. From these facts, it is clear that the waterproofing work can be performed more quickly than in the conventional technique, and the optical fiber core 26 can be visually recognized. No disconnection failure occurs. In addition, since it can be used until it is damaged, the cost of goods can be reduced.

The embodiment has the following features. (1) In the optical fiber cable switching work, the optical fiber connection point can be protected from bending, impact, dust, water droplets by storing the optical fiber connection point in a strong transparent half-slit cylinder and wrapping it with a transparent vinyl sheet. It is characterized by.

(2) The end face plates are attached to both ends in accordance with the strip length of the optical fiber cable jacket, and the waterproof protection width can be freely set. (3) A waterproof fastener that can easily open and close the waterproof sheet is used.

(4) A protective half-cylinder cylinder which is colorless and transparent and which can always check the state of the optical fiber is used. (5) A spring-type one-touch band that can easily attach a waterproof sheet to each end face plate is used.

[0021]

As described above, the use of the present invention simplifies the waterproofing operation over a plurality of times in the optical fiber cable switching work, and also performs the waterproofing and protecting work while visually checking the optical fiber core. By doing so, it is possible to eliminate the possibility of the optical fiber core wire being caught or broken in the waterproofing work, thereby providing an advantage in that the service of the customer can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing an example of a receiving member of the optical fiber cable connection point temporary waterproofing protective gear according to the present invention.

FIG. 4A is a side view showing an example of a transparent half-cylinder mounting bracket according to the present invention, and FIG. 4B is a side view showing an example of a transparent half-split cylinder according to the present invention.

5A is a side view showing an example of an end plate according to the present invention, and FIG. 5B is a side view showing another example of the end plate according to the present invention.

FIG. 6 is a perspective view showing an adhesive waterproof sheet attached to a conventional optical fiber cable.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Transparent waterproof sheet, 11 ... Female fastener, 12 ... Male fastener, 13 ... End plate, 14 ... End plate, 15 ... Screw type fasteners, such as an adjust fastener, 16 ... Translucent half-cylinder, 17 ... Transparent half-break Cylindrical mounting bracket, 18: Standard closure internal hardware, 19: Optical fiber core housing, 20: Existing optical fiber cable, 21: New optical fiber cable, 22: Upper optical fiber cable, 23: Transparent half-cylinder fixed magic Tape, 24 ...
Bracket for temporary waterproof protective equipment for optical fiber connection point, 25 ... C-shaped waterproof sheet fixing bracket with spring-type fastener, 26 ...
Optical core wire, 27: cylinder of cylindrical member, 28: cylinder of cylindrical member.

Claims (3)

[Claims] 1. A temporary waterproof protective device for a switching connection point in a cable lead-in portion of an optical fiber cable, wherein a flat plate protruding portion is provided in a direction toward a center of a radius from a central inner surface of a semicircular half-split cylindrical mounting bracket. T-shaped projections and T-shaped grooves are respectively provided at both ends of the semi-circular half-split cylindrical mounting bracket, and the two T-shaped projections and grooves at both ends are engaged with each other to form two semi-circles. -Shaped half-cylinder mounting bracket is detachably connected to form an annular half-cylinder mounting bracket,
The projecting portion of the flat plate is locked to the internal hardware of the standard closure at both ends of the optical fiber core housing portion, a U-shaped protrusion is provided at one end in the outer peripheral direction, and a U-shaped protrusion is provided at the other end in the vertical direction. The groove of, the half-cylinder formed of a colorless, transparent hard material, the U-shaped projection of the half-cylinder, so as to substantially match the outer peripheral surface of the annular half-cylinder mounting bracket, An optical fiber cable connection point temporary waterproofing protector, wherein the groove is detachably fitted to form an integral cylindrical body enclosing the switching connection point. 2. A temporary waterproof protective device for a switching connection point in a cable lead-in portion of an optical fiber cable, wherein a circular notch is provided at a central portion of a semicircular end plate or at a peripheral portion thereof. A convex portion is provided at one end of both ends, a concave portion is provided at the other end, screw-type fasteners are fixed around the convex portion and the concave portion, and convex portions at both ends of the diameter of the semicircular end plate,
By fitting the concave part and fitting the screw type fastener,
The two semicircular end plates are detachably connected to each other by grasping the uncovered portions of the cable jackets at both ends of the switching connection point to form an annular end plate. A female fastener is provided on one side in the vertical direction, a male fastener is provided at a position substantially separated from the other female fastener position on the outer periphery of the annular end plate, and a waterproof sheet formed of a transparent vinyl material is provided on the annular shape. So that it almost matches the outer peripheral surface of the end plate,
A C-shaped waterproof sheet fixing bracket provided with a spring-type fastener having an outer periphery substantially the same as the annular end face plate, wherein both ends of the waterproof sheet are detachably connected to each other by the vertical female fastener and the male fastener. A temporary waterproofing protection device for a connection point of an optical fiber cable, wherein both ends of the waterproofing sheet are detachably fitted to an outer peripheral surface of the annular end face plate. 3. A substantially U-shaped cylinder having a receiving metal fixing hole provided substantially at the center of one surface of an L-shaped metal member and a cylinder extending vertically from both ends of the other surface to the other surface. In the member, a flat plate is provided so as to fix the cylinders at both ends horizontally below the tip of the cylinder of one cylindrical member, and the inner diameter of the cylinder of the one cylindrical member is the outer diameter of the cylinder of the other cylindrical member. With a slightly larger diameter, the cylinders of the two cylindrical members are connected so as to be able to expand and contract, and the receiving metal fixing holes and the cable receiving metal are fixed with locking pins. 3. The cylinder according to claim 1, wherein a cylinder fixing hole is provided, the cylinder of the other cylindrical member is locked by bolts, and the two cylindrical members are formed in a substantially rectangular shape. Metal fittings for temporary waterproofing protective equipment for optical fiber cable connection points.