KR100384420B1 - optical fiber splice closure for few-cored - Google Patents

Abstract

The present invention is connected to the connection point of the optical fiber is stored inside the connection box for the connection and protection of the connection point of the optical cable during the connection and branching of the optical cable, in order to protect the connection point of the internal mounting components and optical cable from the external environment Upper and lower housings, insertion and sealing means for sealing the cable insertion hole located on the side of the upper and lower housings in which the optical cable is inserted when the upper and lower housings are fastened, and fixed to the lower housing, and fixed the optical cable and the center of the tension line and the cable The present invention relates to a low-core optical cable connection enclosure comprising an inner bracket portion for preventing flow, and a tray portion fixed to the inner bracket portion and storing a connector of the optical cable and arranging the length of the cable.

According to the present invention, the optical cable for low core wires can be reduced in size by the use of an integral inner bracket part with a high degree of sealability and a high degree of sealing allowance without changing the structure of optical cables of various outer diameters. Connection enclosures can be provided.

Description

Optical fiber splice closure for few-cored

The present invention is connected to the connection point of the optical fiber is stored inside the connection box for the connection and protection of the connection point of the optical cable during the connection and branching of the optical cable, in order to protect the connection point of the internal mounting components and optical cable from the external environment Upper and lower housings, insertion opening sealing means for sealing the cable insertion hole located on the upper and lower housing side in which the optical cable is inserted when the upper and lower housings are fastened, and fixed to the lower housing, and secures the optical cable, the central tensile line and the cable The present invention relates to a low-core optical cable connection enclosure comprising an inner bracket portion for preventing flow, and a tray portion fixed to the inner bracket portion and storing a connector of the optical cable and arranging the length of the cable.

In the cable-based communication system, in the case of long-distance communication, cables must be connected to each other in a long distance communication according to the unit length limitation of the cable, and thus connection points occur every certain length.

An optical splice enclosure is a device that protects this connection point, which is vulnerable to external environments, such as moisture, vibration, tension, and insects, and minimizes light loss.

In general, the optical splice enclosure is divided into upper and lower parts, and after storing the connector with the connection point of the cable inside, the upper and lower parts are interlocked and the fastening boundary is sealed to protect the connector from the external environment.

At this time, the problem is the sealing at the cable insertion hole into which the optical cable is inserted into the junction box. In the conventional case, a sticky and adhesive sealing tape is wound around the insertion cable to seal it with a bolt, or It uses a variety of grommet and forms a stopper to seal.

The sealing method of the cable insertion port using the sealing tape is inferior in workability during the installation of the junction box or the maintenance of the connection point due to the sticky nature of the sealing tape, and it is necessary to wind a certain amount of the sealing tape on the cable into which the worker is inserted. The degree of sealing of the cable insert varies according to the level of skill.

In addition, this method is greatly affected by the external environment, especially temperature, over time, resulting in inferior seal reliability.

The use of different types of grommet and the closure of the grommet are mainly used for compound injection-type enclosures, which only have the function of preventing the compound injected into the enclosure from leaking out. And the sealing of the cable insert can not be maintained.

Moreover, to accommodate the outer diameters of various cables, the number of grommet required as the outer diameter of the cable is increased, and the economical loss is caused because the remaining accessories that are not used are to be discarded or stored separately.

On the other hand, the device that stores the connector in the junction box, protects the connection point, and takes care of cable lengthening is called a tray.

Conventional trays have different tray structures according to the type of optical fiber splices, and thus the tray sizes vary, and a new tray structure is required every time a new splice is supplied since the splicer has a sensitive influence on the splice when the storage space of the splice is insufficient. do.

In addition, the cable twisting occurs when the cable is arranged in a fixed manner according to the tray structure after connecting the optical fiber.

The cable fixing device that protects the cable from the external environment such as bending and twisting, and the tensioning wire fixing device that fixes the center tensile line of the cable are made up of separate parts, which not only widens the use area, but also provides additional cable installation and maintenance. The trays must be removed and operated, which creates flow in even the maintenance-free splices and carries the risk of excessive bending or breaking.

The present invention has been made to solve the above problems, and the object of the present invention is to provide a low-core optical cable connection enclosure that can reduce the use area by forming the cable fixing device and the tension line fixing device in one plate integrally. have.

Another object of the present invention is to provide a low-core optical cable connection enclosure capable of accommodating a variety of cable outer diameter with a single sealing means and easily secured in sealing the cable insert regardless of the outer diameter of the various cables. have.

In addition, the present invention can protect the splice without affecting the type of splice in the protection of the optical fiber splice point, and arrange the optical fiber cable in a variety of ways to the inside of the optical splice enclosure during additional installation and maintenance of the tray and optical fiber cable An object of the present invention is to provide a low-core optical cable connection enclosure that can minimize bending and breakage of optical fibers.

1 is a plan view of a junction box according to a specific embodiment of the present invention.

FIG. 2 is a detailed view of the insert opening sealing means of FIG. 1.

FIG. 3 is a detailed view in which the inner bracket part of FIG. 1 is embodied. FIG.

4 is a detailed view illustrating the tray part of FIG. 1.

<Explanation of symbols for the main parts of the drawings>

10a: upper enclosure 10b: lower enclosure

20: insertion hole sealing means 30: inner bracket portion

40 tray section

The present invention has been proposed in order to achieve the above object, unlike the method of using a separate plastic plug and sealing tape in sealing the cable insertion hole, without the use of these, the insertion hole having a cable inlet protruding into a solid shape The sealing means is formed of a rubber material and the one end side of the insert opening sealing means can be cut according to the outer diameter of the cable to be inserted to enlarge the outer diameter of the insert.

In addition, the tray inside the junction box to form a groove for storing the connector, to secure a sufficient space to accommodate a variety of connectors to increase the margin of accommodation.

In addition, the protective plate is installed in a flexible rubber material to prevent the splice from escaping to the outside of the splice storage unit and to minimize the external impact, thereby preventing the sputter of the splice due to the splice flow.

The cable fixing device and the tensioning wire fixing device are integrated into one plate in the inner bracket to reduce the use area, and it is possible to work without removing the tray when installing and maintaining the optical cable. Overcome the risk of excessive bending or breaking of the splice.

Hereinafter, the configuration and operation of specific embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a junction box according to a specific embodiment of the present invention.

Figure 1a is a plan view of the upper housing of the splice enclosure of the present invention, Figure 1b is a plan view of the splice enclosure.

As shown in Figs. 1A and 1B, the connection enclosure is formed by fastening the upper and lower enclosures 10a and 10b and the upper and lower enclosures 10a and 10b to protect the connection points of the internal mounting components and the optical cable from the external environment. Fixing hole sealing means 20 for sealing the cable insertion hole located on the side of the upper and lower housing parts (10a, 10b) into which the optical cable is inserted, and fixed to the lower housing part (10b), fixing the optical cable and the center of the tension line and the cable It consists of an inner bracket 30 to prevent flow, and a tray 40 fixed to the inner bracket 30 to store the connector of the optical cable and to arrange the length of the cable.

The upper and lower enclosures have a tray 40 inside, which serves as a cover for the lower housing 10a and the lower housing 10a, which store the connector of the cable and clean up the cable, and protect the internal mounting components from the external environment. It consists of the upper housing (10b).

Sides of the upper and lower housing parts 10a and 10b are provided with a plurality of cable insertion openings to facilitate the insertion and branching of the cable, and a flange for coupling the upper and lower housing parts 10a and 10b to the flange surface of the housing. Grooves 11 are formed at predetermined intervals.

The housing fastening groove 11 may be divided into a bolt groove and a nut groove, and a nut is inserted into and fixed to the nut groove, and the upper and lower housing parts 10a and 10b are combined by assembling the bolt. To prevent breakage and loss, threads are formed only on certain parts of the bolts so that the enclosure can be removed without removing the bolts completely.

After the connector is built, the upper and lower housing parts 10a and 10b are fastened and the upper and lower housing parts 10a and 10b fill gaps in the seam where the upper and lower housing parts 10a and 10b come into contact with each other. And insert the side gasket.

In addition, the upper housing is equipped with an air injection valve for air injection, the lower housing is equipped with a ground terminal to protect the optical cable from lightning.

The cable for connection or branching is inserted into the enclosure portions 10a and 10b through the insert opening sealing means 20 to ensure sealing.

FIG. 2 is a detailed view of the insert opening sealing means of FIG. 1.

The insertion opening sealing means 20 mounted on the sealing means seating grooves on the side surfaces of the upper and lower housing portions 10a and 10b includes a cable inlet portion 21 having a protrusion of a solid shape in the cable insertion direction, and an outside of the cable inlet portion 21. It is formed in a longitudinal direction on the side and formed of a rigid material at the beginning of the protruding guide rib portion 22 and the cable entry portion 21 for supporting the tie band when the tie band is fastened, the upper and lower housing parts ( It has a plug portion 30 for preventing the insertion hole sealing means 20 to fall down by the fastening pressure during the fastening of the 10a, 10b.

The cable entry portion 21 is formed of a flexible rubber material to facilitate close contact with the upper and lower housing portions 10a and 10b of a hard material, and cuts one end surface of the cable entry portion according to the cable outer diameter to be inserted to reduce the insertion outer diameter of the cable. Allow to zoom in.

In other words, without a replacement of the accessory according to the outer diameter of the insertion cable by simply cutting a part of the insertion opening sealing means 20 to provide a sealing means that fits the outer diameter of the insertion cable.

To this end, the outer side of the cable entry portion 21 is a numerical value so as to confirm the cutting point of the cable entry portion 21 according to the known cable outer diameter type.

The guide rib part 22 protrudes at predetermined intervals on the outer surface of the cable inlet 21 along oblique lines extending in the cable length direction.

The guide rib 22 cuts the cable inlet 21 according to the cable outer diameter, and then fastens the tie band to the outside of the cable inlet 21 to maximize the sealing of the cable and the cable inlet 21. If you do, play a role.

In addition, the plug 23 made of hard plastic or metal is inserted at the beginning of the insert sealing means 21 to prevent the insert sealing means 21 from being pressed by the clamping pressure when the upper and lower housing portions 10a and 10b are fastened. have.

FIG. 3 is a detailed view in which the inner bracket part of FIG. 1 is embodied. FIG.

The inner bracket portion 30 fixed to the lower housing portion 10b includes a cable fixing device 31 for fixing a cable to be inserted, a tension line fixing device 32 for fixing a central tensile line of the cable, and a tray part. A tray fixing groove 33 for fixing the tray at the lowermost end of the stacked portion of the 40 is provided.

The inner bracket portion 30 is for fixing the tray portion 40, and in the past, the device is integrated into a single plate that separates the cable fixing device and the tensioning wire fixing device, thereby greatly reducing the use area. In particular, the tension line fixing device 32 is positioned at the center of the inner bracket 30 so that the cable including the protective tube moves to the upper portion of the tension line fixing device 32.

This facilitates the insertion of the cable into the tray part 40 by moving the female part of the cable between the space of the lower tray part 40 and the tension line fixing device 32, thereby preventing the optical loss due to unnecessary bending of the cable.

In addition, in the case of maintenance, it is possible to perform the operation without separation of the tray 40, there is no unnecessary flow for the optical cable that does not require maintenance, thereby minimizing excessive bending and breaks, thereby preventing light loss. .

4 is a detailed view illustrating the tray part of FIG. 1.

The tray part 40 fixed to the inner bracket part 30 maintains a radius of curvature to prevent light loss and has circular left and right trimming parts 41a and 41b for arranging the cable part of the cable, and the tray part. (40) With a hinge portion 43 for stacking a plurality of tray portion 40 and a connector storage portion 42 to secure a predetermined space at the bottom of the center to form a connector guide to enable the storage of a variety of connectors; It is composed.

The cable inserted through the insert opening sealing means 20 is fitted to the left and right trimming parts (41a, 41b) and is connected to the other optical cable from one side.

The dressing arrangement method in the dressing arrangements 41a and 41b may be performed in various ways, such as ∞ shape alignment, quantitative alignment, and elliptical alignment, which is determined by the guide portion 44 between the left and right dressing arrangements 41a and 41b. By induction.

This can prevent distortion according to the corresponding optical cable by a variety of dressing method beyond the conventional uniform dressing method.

The trimming trimming parts 41a and 41b maintain the predetermined curvature to prevent optical loss, and the trimming trimming part 41a and 41b is connected to other optical cables at the ends of the optical cable.

The connector storage unit 42 is formed at the lower end of the center portion of the tray unit 40 and is formed of a plurality of grooves so as to separately store the connector.

At this time, the groove is formed to secure enough space to accommodate the connector of various outer diameters, the rubber plate is fitted as a means for minimizing the external impact applied to the connector after inserting the connector into the connector storage 42.

The hinge part 43 in which the tray part 40 is stacked is formed on the opposite side of the cable insertion hole to minimize the bending and impact applied to the optical cable during the further installation or maintenance of the optical cable, and two cylinders are formed at the bottom of one side wall. And two hinge grooves are formed at the upper end so that the cylinder can be fitted.

These hinge grooves, one side of the groove is open in a direction perpendicular to the groove in order to facilitate the separation of the tray portion 40.

In addition, a tray holder is formed on the side surface of the tray part 40 to fix the trays stacked by the hinge grooves.

As can be seen from the above description, the present invention can form the cable fixing device and the tension line fixing device integrally in one plate to reduce the use area to reduce the overall size of the junction box.

The present invention has the advantage of being able to accommodate a variety of cable outer diameter with a single sealing means and to easily secure the sealing ability regardless of the outer diameter of the various cable cable inlet.

In addition, the present invention can protect the splice without affecting the type of splice in the protection of the optical fiber splice point, and arrange the optical fiber cable in a variety of ways to the inside of the optical splice enclosure during additional installation and maintenance of the tray and optical fiber cable It is possible to minimize the bending and breakage generated in the optical fiber.

Claims (7)

In the splice box for storing the splice connecting the splicing point of the optical fiber inside and protecting the splicing point of the fiber cable and arranging the cable when the fiber cable is connected and branched, Upper and lower housings 10a and 10b for protecting the connection points between the internal mounting components and the optical cable from the external environment; Insertion sealing means 20 for sealing the cable insertion port located on the side of the upper and lower housing parts (10a, 10b) into which the optical cable is inserted when the upper and lower housing parts (10a, 10b) is fastened; An inner bracket part 30 fixed to the lower housing part 10b and preventing the flow by fixing the optical cable and the center tension line and the female part of the cable; It is fixed to the inner bracket portion 30 and consists of a tray portion 40 for storing the connector of the optical cable and arrange the female portion of the cable, It is a high-core optical cable connection enclosure, characterized in that it is possible to reduce the size of the overall connection enclosure by using an integral inner bracket portion without increasing the structure of the optical cable of various outer diameters, increase the degree of sealing and acceptability of the connector. The method of claim 1, wherein the insertion hole sealing means 20 is formed of a rubber material to ensure the sealing property of the cable insertion hole without a separate sealing means with its own flexibility, in particular as cutting means to fit the cable outer diameter when inserting a variety of optical cables The optical cable connection enclosure for low-core wires, characterized in that the insertion outer diameter of the optical cable is enlarged by removing part of one side of the insert sealing means (20). According to claim 1, wherein the inner bracket 30 is a cable fixing device 31 for fixing the cable to be inserted, a tension line fixing device 32 for fixing the center tensile line of the cable, and the tray ( It is provided with a tray fixing groove 33 for fixing the tray of the lowermost end of the stack of the 40, characterized in that the area of the inner bracket 30 can be reduced by integrally forming the devices in one plate Low-core optical cable junction box. According to claim 1, wherein the tray portion 40 maintains the radius of curvature that can prevent light loss, and the circular left and right trimming portion (41a, 41b) for arranging the portion of the cable and the tray portion 40 It consists of a splice storage unit 42 for securing a predetermined space at the bottom of the center to enable the storage of a variety of splices, and a hinge portion 43 for stacking a plurality of trays 40 An optical cable connection box for low core wires, characterized in that. 5. The method according to claim 4, wherein the left and right dressing units (41a, 41b) between the left and right dressing units (41a, 41b) to arrange the dressing method of the various methods such as quantitative alignment, ∞ shaped alignment, elliptical alignment at the same time An optical cable connection enclosure for a low-core wire, characterized in that to form a guide portion (44) for guiding the length of the cable so as to be able to. The low-core optical cable connection enclosure according to claim 4, wherein the hinge portion (43) is formed on the opposite side of the optical fiber insert so as to minimize the influence on the storage optical fiber during further installation and maintenance of the optical cable. 5. The splice storage part 42 according to claim 4, wherein the splice storage part 42 inserts a plurality of splices into the splice storage part 42 and minimizes the external shock applied to the splice and protects the splice from the external environment such as flow. An optical cable connection box for low core wires, characterized in that formed in the fitting structure.