KR20000047114A - Folded groove and method therefor - Google Patents

Abstract

PURPOSE: A folded groove and method therefor are provided to prevent generation of focused external force and to reduce leakage of optical signals due to the external force by forming a specific room so as for an optical fiber ribbon laminatedly inserted in the inside to constantly move, and to wind a lot of grooves on a winding drum. CONSTITUTION: A pair of notch grooves(11) separated at a constant interval are arranged to a length direction on a flexible member having a constant width. A folded groove forms a specific room into which a plurality of optical fiber ribbons(20) are laminatedly inserted by putting up both ends around the notch grooves(11).

Description

Folding grooves and how to use them

The present invention relates to a foldable groove in which a plurality of optical fiber ribbons are stacked to be stacked and a method of using the same. More specifically, a pair of notched grooves are formed at the center of a flat member having a considerable length to center the notched groove. The present invention relates to a foldable groove and a method of using the same, which allow folding of both sides of a member to insert a plurality of optical fiber ribbons stacked therein.

In general, the demand for optical cable is gradually increasing due to the spread of subscriber networks related to various communication services such as LAN, LOCAL AREA0 NETWORK, bidirectional communication, and video call.

Such optical cables may be installed over tens of kilometers or thousands of kilometers, and in the case of undergrounding them, a pipe having a certain diameter may be buried in the ground, and a cable may be inserted into the pipeline. It is mainly used.

Such an optical cable is formed of an ultra multi-core optical fiber disposed therein so that a predetermined optical signal is transmitted by each optical fiber core wire.

1 is a cross-sectional view of a conventional multi-slot optical cable.

Referring to this, the multi-slot core 30 has a plurality of grooves 35 having a predetermined depth on the outer circumferential surface thereof is formed spirally in the longitudinal direction to stack a plurality of optical fiber ribbons 20 in the groove 35 It is made so that it can be inserted.

In addition, in recent years, as the number of subscribers increases, more ultra-high optical cables are required. For this purpose, the multi-slot core 30 is formed in a multi-layered structure, or a plurality of U on the outer circumferential surface of the multi-slot core 30 of one layer. By arranging the grooves 40 in a spiral manner and inserting a plurality of optical fiber ribbons 20 into the U grooves 40 in a stacked manner, an optical cable having more optical cores is manufactured.

However, since the groove 35 or the U groove 40 of the multi-slot core 30 does not have enough space for the optical fiber ribbon 20 inserted therein to flow, the optical fiber is brought into contact with the inner wall surface. Intensive side pressure is applied to the ribbon 20, and the side pressure is transmitted to the optical core inside the optical fiber ribbon 20, so that an optical signal is leaked.

In addition, since the U groove 40 is manufactured in a state where both side walls are erected and wound on a winding drum, it is difficult to wind a large amount, so that the winding drum is too much to install a long cable of several kilometers or several tens of kilometers. There is a growing problem.

The main object of the present invention is to prevent the intensive external force from acting on one side of the optical fiber ribbon by forming a predetermined free space in which the optical fiber ribbon inserted to be stacked therein can be constantly flown, and thus the optical signal leakage It is to provide a foldable groove and a method of using the same to reduce the number.

Another object of the present invention is to provide a foldable groove and a method of using the same, which can wind a large amount of grooves in a winding drum of the same size.

1 is a cross-sectional view of a conventional multi-slot optical cable,

Figure 2 is a perspective view of a folding groove first embodiment according to the present invention,

3 is a perspective view showing a modification of the first embodiment of the folding groove according to the present invention,

4 is a perspective view showing another modified example of the folding groove first embodiment according to the present invention;

5 is a perspective view showing another modified example of the folding groove 1st embodiment according to the present invention;

6 is a perspective view of a foldable groove second embodiment according to the present invention;

7 is a perspective view of a foldable groove according to a third embodiment of the present invention;

8 is a perspective view showing a modification of the folding groove third embodiment according to the present invention;

9 is a cross-sectional view showing a state of use of the folding groove first embodiment according to the present invention;

10 is a cross-sectional view showing a use state of a modified example of the folding groove first embodiment according to the present invention;

11 is a cross-sectional view showing a use state of another modified example of the foldable groove first embodiment according to the present invention;

12 is a cross-sectional view showing a use state of a further modified example of the folding groove first embodiment according to the present invention;

Figure 13 is a cross-sectional view showing a state of use of the folding groove third embodiment according to the present invention,

14 is a flowchart showing a first embodiment of a method of using a foldable groove according to the present invention;

15 is a cross-sectional view showing a state in which the foldable groove according to the present invention is bonded and used,

16 is a cross-sectional view showing a state in which a modified groove of the folding groove according to the present invention is bonded and used;

17 is a flow chart showing a modification of the first embodiment of the method of using a foldable groove according to the present invention;

18 is a cross-sectional view showing a state of use of the folding groove second embodiment according to the present invention;

19 is a flowchart illustrating a second embodiment of a method of using a foldable groove according to the present invention.

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

10: folding groove 11: notch groove

13: both sides 15: reinforcement protrusion

16: support jaw 17: protruding jaw

18: folding groove 19: both ends

20: optical fiber ribbon

According to a first embodiment of the folding groove according to the present invention, a pair of notched grooves spaced a predetermined distance from a central portion of the upper surface of the flexible member having a predetermined width is formed along the longitudinal direction of the member to fold both sides about the notch groove. When raised, it is characterized in that a space for inserting a plurality of optical fiber ribbons are stacked therein.

In the first embodiment of the folding groove according to the present invention, the notched groove has a feature formed at an angle of 50 ° to 135 °.

In the first embodiment of the foldable groove according to the present invention is provided on the bottom surface of the groove is provided with a reinforcing protrusion protruding with a predetermined radius of curvature about the notch groove to reinforce the notch groove.

In the first embodiment of the foldable groove according to the present invention is provided on the bottom surface of the foldable groove is provided with a support portion thickening toward both sides of the notch groove when the support portions of the adjacent foldable groove is folded with each other when the sides are folded around the notch groove The foldable groove is characterized in that it is supported so as not to open in both directions.

In the first embodiment of the foldable groove according to the present invention on the bottom surface of the groove at least one support jaw is formed to protrude a predetermined length at a predetermined position on both sides with respect to the center of the notch groove to form both sides around the notch groove When folded up, the supporting jaws of adjacent folding grooves are in contact with each other so that the folding grooves do not open in both directions.

According to a second embodiment of the folding groove according to the present invention, a pair of notched grooves spaced at predetermined intervals in a central portion of the upper surface of the flexible member having a predetermined width is formed along the longitudinal direction of the member, and on both sides of the bottom surface of the member. When a predetermined folding groove is provided along the longitudinal direction of the member at a portion located inwardly at a predetermined interval, the both sides are folded up around the notch groove, and both ends of the folding groove are folded outwardly. A space is formed in which a plurality of optical fiber ribbons are stacked to be stacked, and both sides of adjacent members are in contact with each other to prevent the two sides of the optical fiber ribbon from being folded up.

In the second embodiment of the folding groove according to the present invention, the notched groove has a feature formed at an angle of 50 ° to 135 °.

In the second embodiment of the foldable groove according to the present invention is provided on the bottom surface of the groove is provided with a reinforcing protrusion protruding with a predetermined radius of curvature about the notch groove to reinforce the notch groove.

According to a third embodiment of the folding groove according to the present invention, a pair of notched grooves spaced a predetermined distance from a central portion of the upper surface of the flexible member having a predetermined width is formed along the longitudinal direction of the member, and downwards at both ends of the member. When the protruding jaw of a predetermined length bent at right angles is provided to fold both sides around the notch groove, a space for inserting a plurality of optical fiber ribbons is formed therein, and the protruding jaws of adjacent members are in contact with each other. It has a feature made so that both sides do not open up.

In the third embodiment of the folding groove according to the present invention, the notched groove has a feature formed at an angle of 50 ° to 135 °.

In the third embodiment of the foldable groove according to the present invention is provided on the bottom surface of the groove is provided with a reinforcing protrusion protruding with a predetermined radius of curvature about the notch groove to reinforce the notch groove.

The first embodiment of the method of using a foldable groove according to the present invention is to raise the both sides of the member centered on the notched groove in the center to form a space in which the optical fiber ribbon is inserted, the groove installation step of arranging adjacent foldable grooves in close contact with each other And an optical fiber ribbon inserting step of inserting a plurality of optical fiber ribbons to be stacked in the folding groove.

In the first embodiment of the method of using a foldable groove according to the present invention in the state in which both sides of the member is folded up around the notch groove to attach the notched groove portion with an adhesive, or heat-sealed to prevent the two sides of the folded up to open The adhesion step has a further feature.

The second embodiment of the method of using a foldable groove according to the present invention is to fold both sides of the member centered on the notched groove in the center, the both ends of the optical fiber ribbon is inserted so as to open outward about the folding groove of the inner side of both ends Forming a space and arranging the two end portions of adjacent members to be in contact with each other so that grooves are formed so as not to be opened, and a ribbon inserting step of inserting a plurality of optical fiber ribbons stacked in the folding grooves. Has characteristics.

Hereinafter, with reference to the accompanying drawings for the preferred configuration of the folding groove first embodiment according to the present invention will be described in detail.

Figure 3 is a perspective view of a foldable groove first embodiment according to the present invention, Figure 4 is a perspective view showing another modification of the foldable groove first embodiment according to the present invention, Figure 5 is a foldable groove according to the first embodiment of the present invention It is a perspective view which shows another modified example.

Referring to this, in the first embodiment of the foldable groove, a pair of notched grooves 11 spaced a predetermined distance from the center of the upper surface of the flexible member having a predetermined width are formed along the longitudinal direction of the member. At this time, the notch groove 11 is formed at an angle of 50 ° ~ 135 °.

Therefore, when the foldable groove 10 folds up both side surfaces 13 around the center notch groove 11, a space is formed in which a plurality of optical fiber ribbons are stacked.

In addition, the modified groove of the foldable groove is provided on the bottom surface of the foldable groove 10 is provided with a reinforcement protrusion 15 protruding at a predetermined radius of curvature around the notch groove 11, and the notch groove is relatively weaker than other portions. (11) to reinforce the site.

Another modified example of the foldable groove is provided on the bottom surface of the foldable groove 10 is provided with a support portion 14 which is thickened toward both sides of the notch groove 11 to fold both sides 13 around the notch groove 11. When the support portion 14 of the adjacent folding groove 10 is in contact with each other is made to support the folding groove 10 so as not to open in both directions.

Another modified example of the foldable groove is formed on the bottom surface of the foldable groove 10 is formed with a support projection 17 protruding a predetermined length so as to be located on both sides with respect to the center of the notch groove 11.

Therefore, when the foldable groove 10 is disposed in close contact with the support jaw 16 in contact with each other, both side surfaces 13 of the adjacent foldable groove 10 are supported so as not to be opened by the support jaw 16.

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

6 is a perspective view of a foldable groove second embodiment according to the present invention.

Referring to this, in the second embodiment of the folding groove, a pair of notched grooves 11 spaced a predetermined distance from the center of the upper surface of the flexible member having a predetermined width is formed along the longitudinal direction of the member, and the bottom of the member On the part, the predetermined folding groove 18 is formed along the longitudinal direction of the member in the part located inward at predetermined intervals from both side ends. At this time, the notch groove 11 is formed at an angle of 50 ° ~ 135 °.

Therefore, when the folding groove 10 is folded up to open both sides 13 around the notch groove 11 and open to both sides 19 outwardly about the folding groove 18, therein A space into which a plurality of optical fiber ribbons are stacked is formed, and both end portions 19 of the foldable grooves 10 installed to be adjacent to each other are in contact with each other so that the folded side surfaces 13 are not opened.

In addition, on the bottom surface of the foldable groove 10 is provided with a reinforcement protrusion 15 protruding at a predetermined radius of curvature around the notch groove 11 to reinforce the notch groove 11.

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

7 is a perspective view of a third embodiment of the folding groove according to the present invention, Figure 8 is a perspective view showing a modification of the third embodiment of the folding groove according to the present invention,

Referring to this, in the third embodiment of the foldable groove, a pair of notched grooves 11 spaced a predetermined distance from the center of the upper surface of the flexible member having a predetermined width are formed along the longitudinal direction of the member, and both sides of the member The end is provided with a protruding jaw 17 of a predetermined length bent perpendicularly downward. At this time, the notch groove 11 is formed at an angle of 50 ° ~ 135 °.

Therefore, when the foldable groove 10 is folded up on both sides 13 around the notch groove 11, a space is formed in which a plurality of optical fiber ribbons are stacked, and adjacent foldable grooves 10 are formed. When arranged so as to be in close contact with each other, the protruding jaw 17 protruding outwards is in contact with each other so that the two sides (13) folded up do not open.

In addition, on the bottom surface of the foldable groove 10 is provided with a reinforcement protrusion 15 protruding at a predetermined radius of curvature around the notch groove 11 to reinforce the notch groove 11.

Looking at the use method and the working example of the folding groove according to the invention by the above configuration as follows.

9 is a cross-sectional view showing a state of use of the folding grooves first embodiment according to the present invention, Figure 10 is a cross-sectional view showing a state of use for a modified example of the folding grooves first embodiment according to the present invention, Figure 11 Cross-sectional view showing a state of use of another modified example of the foldable groove according to the first embodiment. ,

12 is a cross-sectional view showing a use state of another modified example of the folding groove according to the first embodiment of the present invention, Figure 13 is a cross-sectional view showing a use state of the folding groove third embodiment according to the present invention, Figure 14 1 is a flowchart illustrating a first embodiment of a folding groove using method according to the present invention.

Referring to this, the first embodiment of the method of using the foldable groove is formed by folding both sides 13 of the member about the notch groove 11 in the center to form a space into which the optical fiber ribbon 20 is inserted, and the foldable groove Groove installation step (ST-1) for placing the 10 to be in close contact with each other on the outer peripheral surface of the multi-slot core (30) or the center tension line, and inserting a plurality of optical fiber ribbons 20 in the foldable groove (10) stacked The optical fiber ribbon insertion step (ST-2) is performed.

In this manner, a predetermined taping operation is performed on the circumferential surface of the folding groove 10 into which the optical fiber ribbons 20 are stacked to complete the optical cable.

At this time, the foldable groove 10 has a property that both sides 13 are to be opened to the outside at a predetermined angle, such that the foldable groove 10 is in close contact with each other around the multi-slot core 30 or the center tensile line When placed, the grooves 10 are opened to the outside at a predetermined angle until both sides 13 of the groove 10 are in contact with both sides of the adjacent folding groove 10.

Therefore, a predetermined free space is formed on both side surfaces 13 of the optical fiber ribbon 20 stacked and inserted in the folding groove 10, and the optical fiber ribbon 20 flows relatively freely in the folding groove 10. The lateral pressure concentrated on any part of the optical fiber ribbon 20 in contact with the inner wall surface of the foldable groove 10 is prevented from being applied.

At this time, the foldable groove 10 as shown in FIG. 11 is provided with support protrusions 16 protruding outward a predetermined length on both side surfaces 13, and the circumferential surface of the foldable groove 10 as a center tensile line or multislot core 30. When arranged to be in close contact with each other to prevent the excessive opening of both sides 13 of the foldable groove 10 by the support protrusion 16 of the adjacent foldable groove 10 to the outside.

The foldable groove 10 as shown in FIG. 12 is provided with a protruding jaw 17 protruding a predetermined length outward at both upper end portions thereof, and the protruding jaws 17 of the foldable grooves 10 adjacent to each other come into contact with each other and the foldable groove 10 is provided. Both sides of the 13 will be prevented from excessively spread outward.

FIG. 15 is a cross-sectional view showing a state of bonding a foldable groove according to the first embodiment of the present invention, and FIG. 16 is a cross-sectional view showing a state of bonding a modified fold groove of the first embodiment according to the present invention. 17 is a flowchart illustrating a modification of the first embodiment of a method of using a folding groove according to the present invention.

Referring to this, a modification of the first embodiment of the use of the foldable groove is applied to the notch grooves 11 of the foldable groove 10 or melted by heating and then fold both sides 13 to both sides 13 In the adhesive preparation step (ST-1) so as not to be excessively opened to the outside, the groove installation step (ST-2) for arranging adjacent folding grooves 10 adjacent to each other and in the folding groove (10) It consists of an optical fiber ribbon insertion step (ST-3) for inserting a plurality of optical fiber ribbons 20 stacked.

In this manner, a predetermined taping operation is performed on the circumferential surface of the folding groove 10 into which the optical fiber ribbons 20 are stacked to complete the optical cable.

Therefore, a predetermined free space is formed on both sides of the optical fiber ribbon 20 inserted to be stacked in the folding groove 10 so that the side pressure concentrated on any part of the optical fiber ribbon 20 which is in contact with the inner wall surface of the folding groove 10. This action is prevented, and at the same time both sides 13 of the folding groove 10 can be prevented from excessively spread outward.

18 is a cross-sectional view showing a state of use of the folding groove according to the second embodiment of the present invention, Figure 19 is a flow chart showing a second embodiment of the method for using a folding groove according to the present invention.

Referring to this, the second embodiment of the method of using the foldable groove is to fold both side surfaces 13 of the member about the notch groove 11 in the center, and both end portions 19 are folded grooves 18 inside both ends. To the outer peripheral surface of the multi-slot core 30 or the center of the tension line to form a space in which the optical fiber ribbon 20 is inserted, and both ends 19 of the foldable grooves 10 adjacent to each other are in contact with each other. A groove installation step (ST-1) arranged so that both side surfaces 13 of the foldable groove 10 are supported by the both end portions 19 that are opened outward, and a plurality of optical fiber ribbons are formed in the foldable groove 10. It consists of an optical fiber ribbon insertion step (ST-2) for inserting 20 to be stacked.

In this manner, a predetermined taping operation is performed on the circumferential surface of the folding groove 10 into which the optical fiber ribbons 20 are stacked to complete the optical cable.

Therefore, a predetermined free space is formed on both sides of the optical fiber ribbon 20 inserted to be stacked in the folding groove 10 so that the side pressure concentrated on any part of the optical fiber ribbon 20 which is in contact with the inner wall surface of the folding groove 10. This action is prevented, and at the same time both sides 13 of the folding groove 10 can be prevented from excessively spread outward.

When the present invention is applied to the above, the foldable groove and its use method are formed in the form of a flat plate, so that the amount of the wound around the winding drum of the same size is increased, it is possible to form an optical cable of a longer length.

In addition, the foldable groove and a method of using the same are provided with a predetermined free space in which the optical fiber ribbon can be constantly flowed between both side surfaces of the optical fiber ribbon which are inserted to be stacked therein and the inner wall surface of the groove. The side pressure concentrated at any part is prevented from being applied.

In addition, the folding groove and a method of using the same may limit the angle at which both sides of the folding groove are formed by supporting protrusions or protrusions protruding outward on both sides.

Claims (14)

When a pair of notched grooves 11 spaced a predetermined distance from the center of the upper surface of the flexible member having a predetermined width is formed along the longitudinal direction of the member to fold up both sides 13 around the notched groove 11. Folding groove, characterized in that the space is formed so that the plurality of optical fiber ribbon 20 is inserted to be stacked. The method of claim 1, The notch groove 11 is a foldable groove, characterized in that formed at an angle of 50 ° ~ 135 °. The method of claim 1, Folding grooves, characterized in that on the bottom surface of the foldable groove (10) is provided to reinforce the notch groove (11) is provided with a reinforcing projection (15) protruding with a predetermined radius of curvature around the notch groove (11). The method of claim 1, On the bottom surface of the foldable groove 10 is provided with a support portion 14 which becomes thicker toward both sides of the notch groove is provided when the support side of the foldable groove 10 adjacent to each other when the side surface 13 is folded up around the notch groove 11 ( 14) the foldable groove, characterized in that made to support the foldable groove 10 so as not to open in both directions. The method of claim 1, On the bottom surface of the foldable groove 10, at least one support jaw 16 is formed to protrude a predetermined length at a predetermined position in both directions with respect to the center of the notch groove 11 so that the notch groove 11 is centered. Foldable groove, characterized in that the support chin (16) of the adjacent folding groove 10 is in contact with each other when the two sides (13) are folded up to support the folding groove (10) so as not to open in both directions. A pair of notched grooves 11 spaced apart from each other by a predetermined distance in a central portion of the upper surface of the flexible member having a predetermined width are formed along the longitudinal direction of the member, and a predetermined portion is located in a predetermined interval inwardly from both ends on the bottom surface of the member. The folding groove 18 of the member is provided along the longitudinal direction of the member so as to fold up both side surfaces 13 around the notch groove 11 and to open both end portions 19 around the folding groove 11 to the outside. When folded, a space is formed in which a plurality of optical fiber ribbons 20 are stacked to be stacked therein, and both end portions 19 of the adjacent members are in contact with each other so that the two side surfaces 13 are not opened. Folding grooves. The method of claim 6, The notched groove 11 is a foldable groove, characterized in that formed at an angle of 50 ° ~ 135 °. The method of claim 6, Folding grooves, characterized in that on the bottom surface of the foldable groove (10) is provided to reinforce the notch groove (11) is provided with a reinforcing projection (15) protruding with a predetermined radius of curvature around the notch groove (11). A pair of notched grooves 11 spaced a predetermined distance from the center of the upper surface of the flexible member having a predetermined width is formed along the longitudinal direction of the member, and protruding jaws of a predetermined length bent at right angles to both side ends of the member. When 17 is provided and the both sides 13 are folded up around the notch groove 11, a space is formed in which a plurality of optical fiber ribbons 20 are stacked, and protruding jaws of adjacent members ( Folding groove, characterized in that 17) is made so that the two sides (13) do not open to each other folded. The method of claim 9, The notched groove 11 is a foldable groove, characterized in that formed at an angle of 50 ° ~ 135 °. The method of claim 9, Folding grooves, characterized in that on the bottom surface of the foldable groove (10) is provided to reinforce the notch groove (11) is provided with a reinforcing projection (15) protruding with a predetermined radius of curvature around the notch groove (11). Groove installation step of folding both sides of the member to the center of the notch groove 11 in the center to form a space in which the optical fiber ribbon 20 is inserted, the adjacent fold groove 10 to be in close contact with each other; Method of using a foldable groove, characterized in that it comprises a step of inserting a plurality of optical fiber ribbon 20 in the foldable groove 10 stacked. The method of claim 12, In the state in which the both sides of the member is folded up around the notch groove 11, the step of attaching the notch groove 11 portion with an adhesive, or by heat-sealing, the bonding step of preventing the opening of both sides (13) folded up How to use the folding groove, characterized in that. Fold up both side surfaces 13 of the member about the notch groove 11 in the center, and open both side ends 19 outwardly about the folding grooves 18 inside the two ends. A groove installation step of forming and arranging such that both end portions 19 of the members adjacent to each other are in contact with each other so that the folded side surfaces 13 do not open; Method of using a foldable groove, characterized in that it comprises a ribbon insertion step of inserting a plurality of optical fiber ribbon 20 in the foldable groove 10 stacked.