KR100287767B1 - Fiber Cable Sheath Fixture - Google Patents

Abstract

The present invention relates to an outer sheath fixing device for an optical cable, and an object thereof is to provide an outer sheath fixing device for preventing an outer sheath of an optical cable from contracting in a longitudinal direction according to an external temperature change.

The present invention is fixedly coupled to the optical cable tension line in a certain portion, the housing is formed with a spiral groove on the inner peripheral surface of a certain section from the rear end, and the outer surface of the optical cable that is introduced through the inlet in the center in the state coupled to the spiral groove of the housing An outer shell fixing member having a clamp portion and a fastening member pressurizing the clamp portion of the outer shell fixing member to retract in a center line direction while being coupled to the spiral groove of the housing.

According to the present invention, the optical cable sheath fixing device is fixed to the clamping portion of the outer sheath fixing member in a state that is fixedly coupled with the central tensile line of the optical cable at a certain portion, so that the optical cable sheath the ambient temperature As the change is prevented from contracting in the longitudinal direction, the force corresponding to the external tension is increased.

Description

Fiber Cable Sheath Fixture

The present invention relates to an outer sheath fixing device for an optical cable, and more particularly, to an outer sheath fixing device for preventing an outer sheath of an optical cable from shrinking due to temperature change.

In general, the demand for optical cables is gradually increasing due to the spread of subscriber networks related to various communication services such as LAN, LOCAL AREA NETWORK, bidirectional communication, and video call.

Such optical cables are classified into outdoor cables installed outdoors, indoor cables connected from indoor terminal boxes to equipment, and cable for entering cables from outdoor junction boxes to indoor terminal boxes.

The outdoor cable is again classified into a cable installed in the air, a cable buried underground, and a cable installed on the sea floor. Indoor cables are cables installed inside buildings such as buildings, such as ceilings, floors, walls, and the like. Cables for connecting cables between outdoor cables and indoor cables are used for connection between short distances.

According to the environment of the optical cable installation place, the outdoor cable and the cable for the cable installed in the air are often installed to be exposed to the outside, so they can sufficiently withstand the external environment, that is, the temperature change, snow, rain, impact or tensile force. It must be designed to

1 is a cross-sectional view showing a state that the optical cable is drawn into the terminal box.

Referring to this, the optical end cable 40 is a cable drawn into the terminal box 50 in the premises from the external connection enclosure, it is often installed to be exposed to the outside.

Therefore, the optically short cable 40 should be designed to withstand the external environment, that is, change in temperature, rainfall, snowfall, or tensile force.

In addition, in order to be connected to each connection terminal 55 of the terminal box 50 of the optical fiber 42 embedded in the optical fiber cable 40, the optical fibers 42 embedded in the optical fiber cable 40 are constantly Must be distributed.

2 is a cross-sectional view showing a state in which the outer shell of the optical cable introduced into the optical splitter shrinks.

Referring to this, since the optical cable 40 introduced into the optical splitter 60 is introduced in a state in which the built-in optical fiber 42 is covered by the sheath 46, the optical cable sheath 46 thus introduced is an optical splitter ( 60) It is distributed to each of the optical fibers 42 embedded in a predetermined position inside the optical fiber 42, an optical connector is installed at the end of the optical fiber 42 and connected to the connection terminal in the terminal box.

However, the optical cable splitter 60 is provided with a device for holding the center tensile line 41, but is not provided with a device for holding the outer sheath 46 of the optical cable, the outer sheath 46 of the optical cable changes in temperature outside While shrinking in the longitudinal direction, the inlet 65 of the optical splitter 60 is part of the optical cable sheath 46 is peeled off a certain length, the built-in optical fiber 42 is exposed to the outside and easily disconnected by external shocks or rain or snow, etc. Problems such as contamination easily occur.

This problem is not limited to the optical fiber cable 40, but is a problem that occurs in all optical cables that are installed in a place where a change in ambient temperature can occur, such as an outdoor optical cable installed in the air.

For reference, the optical cable sheath 46 is a PVC-based polymer compound, and the polymers are cooled and manufactured in a uniformly arranged state, so that when the outside temperature rises, the alignment state of the polymer is disturbed, and the polymer is intrinsic. Since the total volume is reduced.

An object of the present invention is to provide an outer sheath fixing device that can prevent the outer sheath of the optical cable in the longitudinal direction as the temperature changes, and the force corresponding to the external tensile force can be further increased. .

1 is a cross-sectional view showing a state that the optical star cable is inserted into the terminal box,

2 is a cross-sectional view showing a state in which the outer shell of the optical cable drawn into the optical splitter shrinkage;

Figure 3 is an exploded perspective view of the optical cable sheath fixing device according to the invention,

Figure 4 is a cross-sectional view showing a state before the optical cable sheath fixing device according to the invention is completely coupled,

5 is a cross-sectional view showing a state in which the optical cable sheath fixing device according to the present invention is completely coupled.

*** Explanation of symbols for the main parts of the drawing ***

10 housing 11 spiral groove

20: outer shell fixing member 21: screw portion

22: clamp portion 23: inclined surface

24: flange 25: inlet

26: boss 27: incision groove

30: tightening member 31: screw portion

33: tightening part 34: extension part

35: entrance 36: rotating part

40: optical cable 41: center tensile

42: optical fiber 46: sheath

The present invention is fixedly coupled to the optical cable tension line in a certain portion, the housing is formed with a spiral groove on the inner peripheral surface of a certain section from the rear end, and the outer surface of the optical cable that is introduced through the inlet in the center in the state coupled to the spiral groove of the housing An outer shell fixing member having a clamp portion and a fastening member pressurizing the clamp portion of the outer shell fixing member to retract in a center line direction while being coupled to the spiral groove of the housing.

In the present invention, the outer shell fixing member is a screw portion coupled to the spiral groove of the housing, an inclined surface formed to retract a predetermined angle in the center line direction while protruding in the opposite direction to the optical cable entry from the rear of the screw portion, and extends in the center line direction at the end of the inclined surface In the center of the state in which the inlet is formed in the inlet for entering the optical cable, a clamp portion consisting of a boss that is in close contact with the outer circumferential surface of the optical cable is extended from the inlet to the inner or outer direction of the housing and the incision in the longitudinal direction Thus, the clamp part has a feature in which a cutout groove is formed to be divided into a plurality of clamp part pieces.

In the present invention has a feature that a ratchet-shaped knurling process is formed on the boss inner circumferential surface of the clamp portion in the opposite direction to the optical cable entry.

In the present invention, the fastening member is a screw portion formed to be coupled to the spiral groove of the housing on the outer peripheral surface of the distal end portion, and is formed so as to retract in the center line direction while protruding from the distal end of the screw portion in the opposite direction of the optical cable entry, the clamp portion of the outer shell fixing member A fastening part pressurizing to retract in the center line direction, and a rotating part having a predetermined angle is provided on the rear outer circumferential surface of the screw part to facilitate a rotation coupling operation.

Hereinafter, with reference to the accompanying drawings for a preferred embodiment of the present invention will be described in detail.

Figure 3 is an exploded perspective view of the optical cable sheath fixing device according to the present invention.

Referring to this, the optical cable sheath fixing device is a housing having a spiral groove 11 formed on the inner circumferential surface of a predetermined section at an end portion thereof in a state in which the optical cable sheath fixing device is fixedly coupled to the central tensile line 41 of the optical cable 40 at a predetermined portion ( 10) and the outer shell fixing member 20 provided with a clamp portion 22 for holding the outer shell 46 of the optical cable introduced through the center inlet 25 in a state coupled to the spiral groove 11 of the housing. And a tightening member 30 that presses the clamp portion 22 of the outer shell fixing member 20 to retract in the centerline direction while being coupled to the spiral groove 11 of the housing 10.

The housing 10 is provided with a tension line fixing part (not shown in the drawing) that is fixedly coupled to the tension line 41 of the optical cable 40 which extends in a predetermined length and is introduced at a predetermined portion.

The outer shell fixing member 20 is formed with a screw portion 21 of a predetermined section coupled to the spiral groove 11 of the housing on the outer circumferential surface of the distal end portion, and from the rear surface of the screw portion 21 in the opposite direction to the optical cable 40 inlet. A protruding clamp portion 22 is provided.

The clamp portion 22 is an inclined surface 23 that forms a tapered angle at a predetermined angle so as to protrude from the rear surface of the screw portion 21 in a direction opposite to the insertion of the optical cable 40 and to retract in the center line direction, and at the end of the inclined surface 23 to the center line direction. In the extended state of the optical cable 40 is formed in the center of the inlet 25 is formed in the inlet 25 is formed in the inlet 25 and the inlet 25 extending inwardly of the housing 10 from the inlet 25 It consists of a boss 26 in close contact with the outer peripheral surface.

At this time, on the inner circumferential surface of the boss 26 of the clamp portion, a ratchet-shaped knurling process is formed that is caught in the direction opposite to the insertion of the optical cable 40, so that the clamp portion 22 tightens the sheath 46 of the optical cable. 46 does not fall back.

In addition, since the plurality of cutting grooves 27 cut in the longitudinal direction are formed in the clamp portion 26 and are divided into the plurality of clamp portions, the clamping member 30 presses the clamp portion 22 toward the center line direction. In this case, the clamp portion 22 is retracted in the direction of the center line while being constantly deformed about the cutting groove 27.

The fastening member 30 has a screw portion 31 coupled to the spiral groove 11 of the housing on the outer peripheral surface of the tip portion, and protrudes from the tip of the screw portion 31 in a direction opposite to the inlet of the optical cable 40. The tightening part 33 which forms the taper of a predetermined angle which retracts in the direction is formed.

A screw head-shaped rotating part 36 is provided on the outer circumferential surface of the screw part 31 of the tightening member 30 so as to easily couple the tightening member 30 to the housing 10, and the rotating part 36 From the rear, an extension portion 34 is provided which retracts in the direction of the center line. At the end of the extension part 34, a predetermined inlet 35 through which the optical cable 40 is introduced into the housing 10 is formed.

Therefore, when the fastening member 30 is coupled with a constant force so as to be in close contact with the outer skin fixing member 20, the clamping portion 33 of the fastening member 30 is the clamp portion 22 of the outer skin fixing member 20 It is pressed to retract in the direction of the center line.

When described in detail based on the accompanying drawings for the operating state of the present invention as follows.

4 is a cross-sectional view showing a state before the optical cable sheath fixing device according to the present invention is completely coupled, Figure 5 is a cross-sectional view showing a state in which the optical cable sheath fixing device according to the present invention is fully coupled.

Referring to this, the fastening member 30 and the shell fixing member 20 are coupled to the outer circumferential surface of the coated optical cable 40. At this time, since the clamp portion 22 of the shell fixing member 20 is constantly opened, it is freely inserted into the outer circumferential surface of the optical cable 40.

Subsequently, the threaded portion 21 of the shell fixing member 20 is coupled so as to be positioned inside the spiral groove 11 of the housing 10, and the housing member is in close contact with the shell fixing member 20. When coupled to the spiral groove 11 of 10), the clamping portion 33 of the tightening member 30 presses the inclined surface 23 of the clamp portion 22 in the direction of the center line, the clamp portion 22 Is in a state of being in close contact with the outer shell 46 of the optical cable while constantly retracting about the incision groove (27).

At this time, since the inner peripheral surface of the inlet port 25 of the clamp unit 22 has a ratchet-shaped knurling process that is caught in the direction opposite to the inlet of the optical cable 40, the outer shell fixing member 20 further covers the outer shell 46 of the optical cable. Hold firmly.

At this time, since the housing 10 is fixedly coupled to the center tension line 41 of the optical cable by the tension line fixing portion of a portion not shown in the drawing, eventually, the center tension line 41 of the optical cable and the optical cable The outer shell 46 is integrally fixed to the housing 10 and the outer shell fixing member 20 fixedly coupled to the housing 10.

Therefore, even if the optical cable sheath 46 is to be contracted in the longitudinal direction in accordance with the change in the ambient temperature, the housing 10 and the outer shell fixing member 20 is fixedly integrally coupled with the central tensile line 41 of the optical cable Since the outer shell 46 is peeled off, the embedded optical fiber 42 is prevented from being exposed to the outside.

In addition, since the optical cable 40 is fixed not only by the center tensile line 41 but also by the sheath 46, the force corresponding to the tensile force applied from the outside is increased.

On the other hand, the optical cable sheath fixing device is not only installed at the end of the optical cable 40, it can be installed in any part of the optical cable 40, so if the shell fixing device is installed in the middle of the optical cable 40, the optical cable ( 40) The tensile force acting on the ends is constantly reduced by the fiber cable sheathing device installed in the middle.

According to the present invention, the optical cable sheath fixing device is fixed to the clamping portion of the outer sheath fixing member in a state that is fixedly coupled with the central tensile line of the optical cable at a certain portion, so that the optical cable sheath the ambient temperature It is prevented from contracting in the longitudinal direction with the change.

In addition, the optical cable sheath fixing device is fixed to the optical cable not only by the center tension line, but also by the sheath, so that the force corresponding to the externally applied tensile force is increased.

Claims (4)

A housing 10 fixedly coupled to an optical cable tension line at a predetermined portion, and having a spiral groove 11 formed at an inner circumferential surface of a predetermined section from a rear end thereof; An outer shell fixing member 20 provided with a clamp portion 22 for holding an outer shell 46 of the optical cable drawn through the central inlet 25 in a state of being coupled to the spiral groove 11 of the housing 10; Optical cable, characterized in that made of a fastening member 30 for pressing the clamp portion 22 of the outer shell fixing member 20 in the state coupled to the spiral groove 11 of the housing 10 to retract in the center line direction. Jacketed fixture. The method of claim 1, The outer shell fixing member 20 includes a screw portion 21 coupled to the spiral groove 11 of the housing 10; An inclined surface 23 protruding from the rear surface of the screw portion 21 in a direction opposite to the inlet of the optical cable 40 and a predetermined angle in the center line direction, and an optical cable in the center in a state extending in the center line direction from the end of the inclined surface 23; A flange 24 having an inlet 25 through which the 40 is inserted, and a boss 26 extending from the inlet 25 to an inner side or an outer side of the housing and in close contact with the outer shell 46 of the optical cable to be drawn therein. A clamp portion 22; Optical cable jacket fixing device characterized in that the incision groove (27) is formed so that the clamp portion (22) is cut in the longitudinal direction so that the clamp portion (22) is divided into a plurality of clamp portion pieces. The method of claim 2, On the inner circumferential surface of the boss (26) of the clamp portion 22, an optical cable sheath fixing device, characterized in that a ratchet-shaped knurling process is formed to be hung in the opposite direction to the optical cable entry. The method of claim 1, The tightening member 30 includes a screw portion 31 formed to be coupled to the spiral groove 11 of the housing on the outer peripheral surface of the tip portion; Tightening part which protrudes from the end of the screw portion 31 in the opposite direction to the inlet of the optical cable 40 and is retracted in the centerline direction to press the clamp portion 22 of the shell fixing member 20 to retract in the centerline direction. 33; On the rear outer circumferential surface of the screw portion 31, the optical cable sheath fixing device, characterized in that the rotating part 36 is formed to form a predetermined angle to facilitate the rotation coupling operation.