KR20160110568A - Optical cable - Google Patents

Abstract

The present invention relates to an optical cable. The optical cable is connected to a main tube and an elongated tube. A plurality of optical fibers are positioned inside the main tube, and an elongated line is positioned inside the elongated tube. Each of the optical fibers has a diameter of 0.250 mm. A cladding is unformed in the outside of each of the optical fibers. The optical fibers are classified by a color or a marking. Therefore, the optical cable can minimize an overall volume by arranging only optical fibers inside the main tube.

Description

Optical cable {Optical cable}

The present invention relates to an optical cable.

An optical cable consists of an optical fiber that transmits a signal, an aramid yarn that protects the optical fiber, a cover, and the like.

Optical cables are installed in apartment buildings, buildings, etc. (hereinafter referred to as "buildings") to transmit optical signals such as communications and information to homes, buildings, and other offices send.

When constructing the optical network, the optical cable is wired to the building as many as the number of living spaces, and the optical cable is connected to the terminal disposed in the living space to transmit the optical signal.

Wiring without bundling a plurality of optical cables may hinder the aesthetics of the building, and the optical fibers may be shaken by the wind and the optical fibers may be damaged.

Patent Registration No. 10-0582803 (2006.05.16)

The present invention provides an optical cable capable of minimizing the volume as a whole by disposing only a plurality of optical fibers in a main tube.

The optical cable according to an embodiment of the present invention is connected to a main tube and a tensile tube, in which a plurality of optical fibers are positioned and a tensile line is located inside the tensile tube, A diameter of 0.250 mm, and the plurality of optical fibers are formed without forming a coating on the outside thereof, and the plurality of optical fibers are separated from each other by color or marking.

The main tube is formed with openings spaced along its longitudinal direction, and one side of the optical fiber can be exposed to the outside of the main tube through the opening.

The stretch tube may have openings spaced along its longitudinal direction.

Wherein the optical cable includes a plurality of branch tubes connected to the main tube and positioned one by one between each of the neighboring openings, one each of the branch tubes connected to the main tube and between the neighboring openings, A plurality of storage tubes spaced apart from the branch tube, and a branch cable connected to the optical fiber and located inside the branch tube and the storage tube.

Wherein the plurality of branch cables are formed in the same number as the openings and the optical fibers and are separated from each other, and each of the plurality of branch cables is divided into one branch tube and one storage tube And one optical fiber may be exposed through one opening and connected to one branch cable.

A branching space is formed between the branching tube and the storage tube located between adjacent openings and a part of the branching cable is exposed in the branching space so that the operator can remove the branching cable located in the storage tube .

The optical cable may further include a cover covering the opening of the main tube, wherein the branch cable includes an optical fiber connected to the optical fiber, an aramid yarn for protecting the optical fiber, and at least one cover, The aramid yarn may be exposed to the outside of the branch tube and fixed between the cover and the outer circumferential surface of the main tube.

The optical signal transmission device according to another embodiment of the present invention includes: a main tube having a plurality of openings spaced along a longitudinal direction; a plurality of optical fibers arranged in the main tube in the same number as the openings, Wherein each of the plurality of optical fibers is exposed to the outside of the main tube through each of the plurality of openings and is disposed between the openings adjacent to each other at intervals along the longitudinal direction of the main tube, A plurality of storage tubes which are spaced apart from each other along the longitudinal direction of the main tube and which are respectively located between the adjacent openings and spaced apart from the branch tubes by a distance, , And between the adjacent openings and disposed within the branch tube and the storage tube And a plurality of branch cables each having one end connected to the optical fiber introduced into the branch tube, wherein the branch cable is exposed through a space between the branch tube and the storage tube, The branch cable portion located in the storage tube may be pulled out.

The optical signal transmission device according to another embodiment of the present invention includes: a main tube having an inner space and a plurality of openings formed at intervals along a longitudinal direction; a light source connected to an outer peripheral surface of the main tube, A first tube portion located between the first tube portion and the second tube portion and connected to an outer circumferential surface of the main tube and positioned between the adjacent openings and spaced apart from the branch tube and divided into a first portion and a second portion, A second storage tube connected to an outer circumferential surface of the main tube and positioned between the adjacent openings, a second storage tube connected to an outer circumferential surface of the main tube and spaced apart from the second storage tube A third storage tube, a plurality of optical fibers positioned within the main tube, a plurality of optical fibers arranged in the branch tube and the first through third storage tubes And it comprises a branch cable with one end connected to the optical fiber.

The branch cable located in the third storage tube may be firstly taken out through a first branch space located between the third storage tube and the second storage tube and used if the branch cable used is taken out and damaged, The branch cable located in the first portion of the first storage tube and the second storage tube can be secondarily extracted and used through the second branch space located between the branch tube and the first portion of the first storage tube.

The optical signal transmission device is characterized in that the branch cable is located inside the first to third storage tubes so that the branch cable can be smoothly bent and inflow when it is introduced into the second storage tube from the first storage tube And a guide member disposed between the first storage tube and the second storage tube.

According to the embodiment of the present invention, since the optical fibers not covered with the coating are disposed in the main tube, the volume of the main tube can be reduced by the volume of the coating. As the volume of the main tube is reduced, the overall weight of the optical cable can be reduced. By reducing the weight, the fabrication cost, transportation and installation work of the optical cable can proceed more easily.

According to the embodiment of the present invention, since the plurality of optical fibers are disposed inside the main tube, the plurality of optical fibers do not move inside the main tube even if the main tube moves due to wind or the like. Therefore, damage of the optical fiber, which may be caused by the shaking of the optical cable, does not occur.

According to the embodiment of the present invention, the same number of optical fibers as the number of living spaces of the building is disposed inside the main tube, and a branch cable connected to the living space is connected to each optical fiber to transmit the optical signal to the living space . The branch cable that transmits the optical signal to the living space is extracted from the storage tube and connected to the living space, and the branch cable that does not transmit the optical signal is stored in the storage tube, so that the appearance of the building where the optical cable is installed is not hindered.

According to the embodiment of the present invention, since the plurality of optical fibers are disposed inside the main tube and are firmly fixed by the tension cable, it is possible to minimize the fluctuation due to the wind. Therefore, it is possible to prevent the damage of the optical fiber which may occur due to the shaking.

According to the embodiment of the present invention, when the current communication company re-opens to the current communication company even if the changed communication company cuts off the branch cable that the current communication company pulls through the first quarter space and changes the communication company, The remaining part of the branch cable stored in the first portion of the first storage tube and the remaining portion of the branch cable stored in the second storage tube are pulled out through the second branch space and the branch cable is shortened so that an extension line operation for extending the length of the branch cable is not required, The branching operation can be simplified. Also, since the optical cable installed on the outer wall can be continuously used, the cost for installing the optical cable can be minimized.

1 is a state in which an optical cable is installed according to an embodiment of the present invention;
Fig. 2 is a perspective view of the optical cable shown in Fig. 1; Fig.
Fig. 3 is a schematic view showing another embodiment of the optical cable shown in Fig. 2; Fig.
FIG. 4 is a view showing an optical cable installation state according to another embodiment of the present invention. FIG.
5 is a partial perspective view of the optical cable shown in Fig.
FIG. 6 is a sectional view of FIG. 5 taken along the line VI-VI.
7 is a cross-sectional view taken along line VII-VII of FIG. 5;
8 is an enlarged view of a portion A in Fig.
9 is a sectional view showing an optical cable according to another embodiment of the present invention.
FIG. 10 is an enlarged view of the use state of the branching cable in the first branching space of FIG. 9; FIG.
Fig. 11 is a use state diagram showing an enlarged state of branching cables in the second branch space of Fig. 9; Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated with like reference numerals throughout the specification.

An optical cable apparatus according to an embodiment of the present invention will now be described with reference to FIG.

1 is a conceptual diagram illustrating a state in which an optical cable device according to an embodiment of the present invention is wired.

1 and 2, an optical cable 100 according to the present embodiment is installed on an outer wall of a building 1 and transmits optical signals such as communication and information to the living spaces 1a, 1b, and 1c Which includes a main tube 10, optical fibers 70a, 70b, 70c and a tensioning portion 90. [

The main tube 10 has a predetermined length, and its length may vary depending on the height of the building. One end of the main tube 10 may be located at the lowest point of the building and the other end may be located at the highest point of the building. The positions of the one end and the other end of the main tube 10 can be mutually changed.

The interior of the main tube 10 is empty and openings 11a, 11b, and 11c are formed at intervals along the longitudinal direction to communicate an empty internal space to the outside. The intervals of the openings 11a, 11b, and 11c may vary depending on the interval of the neighboring living space. The openings 11a, 11b, and 11c may be completely penetrated through the main tube 10 portion or may be cut to penetrate only a part of the main tube 10. [

The number of the openings 11a, 11b and 11c is determined in accordance with the number of living spaces of the building in which the optical cable 100 is installed. For example, if there are 25 living spaces in the building, the openings may be formed in 25 or more than 25 openings.

At both ends of the main tube 10, a cap (not shown) for blocking the entry of foreign substances into the main tube 10 is coupled. However, the cap can be omitted.

The optical fibers 70a, 70b and 70c include a core for transmitting an optical signal, a clad for wrapping the core and preventing signals transmitted through the core from being reflected, a coating layer surrounding the clad, and a color layer surrounding the coating layer . Although the optical fiber is described as a core, a clad, a coating layer, and a color layer in this embodiment, the structure of the optical fiber may vary depending on the size of the optical fiber.

The optical fibers 70a, 70b and 70c are disposed inside the main tube 10 and one end thereof may be exposed to the outside through one end of the main tube 10. A connector (not shown) for connecting to a terminal box (not shown), an adapter (not shown), or the like may be connected to the exposed portions of the optical fibers 70a, 70b, and 70c. The portions of the optical fibers 70a, 70b and 70c located inside the main tube 10 are not protected by the cover and the portions exposed through one end of the main tube 10 can be protected by the cover.

The diameter of each optical fiber is 0.1 mm to 0.5 mm. The diameter of the preferred optical fibers 70a, 70b, 70c is 0.250 mm. If the diameter of the optical fibers 70a, 70b and 70c is less than 0.1 mm, the optical fibers 70a, 70b and 70c may easily be damaged. If the diameters of the optical fibers 70a, 70b and 70c are more than 0.5 mm, the diameter of the main tube 10 must be increased have.

On the other hand, the diameter of an optical cable (including optical fiber and a plurality of coating layers) installed in a building for transmission of an ordinary optical signal to the living space is 3 mm.

Assuming that the number of optical fibers having a diameter of 0.250 mm is 25, the bundled optical fibers have a diameter of 6.25 mm. If there are 25 optical cables with a diameter of 3 mm, the optical cable diameter is 75 mm. A large difference in diameter between the plurality of optical fibers and a plurality of optical cables occurs. As can be seen from the above figures, it can be seen that the diameter of only 25 optical fibers is smaller than the diameter of a plurality of optical cables including the covering.

Therefore, when only the optical fiber not covered with the cover is positioned inside the main tube 10, the volume of the main tube 10 is minimized, as compared with the case where the optical cable protecting the optical fiber is located inside the main tube 10 can do. The volume of the main tube 10 can be minimized because the optical fibers that are not protected by the cover are located inside the main tube 10 in this embodiment. Accordingly, the volume of the optical cable 100 is minimized, and the optical cable 100 can be easily transported and installed.

The other ends of the optical fibers 70a, 70b and 70c can be drawn out of the main tube 10 through the openings 11a, 11b and 11c.

The optical fibers 70a, 70b, and 70c may be distinguished from each other by a hue. The colors of the optical fibers may be approximately blue, orange, green, red, yellow, purple, brown, black, white, gray, The color of the optical fiber can be varied in various ways. On the other hand, if there is a duplicate color, one can be marked and distinguished from each other. For example, if there are two blue colors, one is marked and the other is not.

The coating surrounding the exposed optical fiber through one end of the main tube 10 may also be formed in the same color as the optical fiber and may be marked if overlapped.

On the other hand, if all the optical fibers are formed in the same color, all the optical fibers need to be connected to the terminal box, and the installation and maintenance work is deteriorated. However, in this embodiment, since the plurality of optical fiber colors are different from each other, the above problem does not occur. For example, when the optical fiber 70a connected to the first floor living space 1a is red, only the red optical fiber 70a is connected to the terminal box at the end of the optical cable 100 or only the red optical fiber 70a is checked The installation and maintenance of the optical cable 100 can be improved.

The tensioning portion 90 includes a tensioning tube 91 connected to the outer surface of the main tube 10 and a tensioning wire 92 disposed within the tensioning tube 91. The tensile lines 92 can be made of metal. Contaminants such as rainwater and dust are prevented from contacting with the tension line 92 by the tension tube 91, and corrosion of the tension line 92 due to the contaminant can be prevented.

One end of the tension portion 90 can be fixed to the lower side of the building and the other end can be fixed to the upper side of the building. The tensioning portion 90 allows the tensile force to be maintained when the optical cable 100 is installed on the outer wall of the building. The swing of the optical cable 100 due to the strong wind can be minimized by the tension of the tension portion 90. Damage to the optical fibers 70a, 70b, and 70c due to shaking of the optical cable 100, noise, and the like can be prevented.

The tensioning portion 90 may be omitted. In this case, the openings 11a, 11b, and 11c are formed by partially cutting the main tube 10, and both sides of the main tube 10 can be fixed to the building.

According to the present embodiment, since the optical fibers 70a, 70b and 70c which are not covered with the cover are disposed in the main tube 10, the volume of the main tube 10 can be reduced by the volume of the cover. Since the volume of the main tube 10 is reduced, the overall weight of the optical cable 100 can be reduced. By reducing the weight, the transportation and installation work of the optical cable can be carried out more easily.

Other embodiments of the present invention have most of the components of the embodiment described with reference to Figs. However, the present embodiment further includes the terminal box B. Openings 91a, 91b and 91c are formed in portions of the tension tube 92 adjacent to the openings 11a, 11b and 11c of the main tube 10. The openings 92a, 92b, and 92c are spaced apart along the longitudinal direction of the tensile tube 92.

The terminal box B is disposed in each of the openings 11a, 11b and 11c of the main tube 10 and is fixed to the tension line 92 exposed through the openings 91a, 91b and 91c. The terminal box B is fixed by the tension line 92 and does not move. The optical fibers 70a, 70b and 70c exposed through the openings 11a, 11b and 11c are positioned in the terminal box B and are connected to branching optical cables (not shown) branched into the living spaces 1a, 1b and 1c, Can be connected to the optical fibers 70a, 70b and 70c in the terminal box B. [ The lengths of the optical fibers 70a, 70b and 70c may be different when the optical cable 200 is manufactured in a state where the terminal box B is coupled to the tension line 92. [

 Many of the features shown in the embodiments shown in Figs. 1 to 8 can be applied to this embodiment.

Next, another embodiment of the present invention will be described with reference to Figs. 4 to 8. Fig.

FIG. 4 is a perspective view of an optical cable according to another embodiment of the present invention, FIG. 5 is a partial perspective view of the optical cable shown in FIG. 4, FIG. 6 is a sectional view taken along line VI- 5 is a cross-sectional view taken along line VII-VII, and FIG. 8 is an enlarged view of a portion A of FIG.

First, referring to FIG. 4, the optical cable 200 is installed on the outer wall of the building 1. The branching cables 80a, 80b and 80c connected to the plurality of optical fibers 70a, 70b and 70c arranged in the main tube 10 are branched into the living spaces 1a, 1b and 1c, , 1b, and 1c.

The branch cables 80a, 80b and 80c do not branch to all the living spaces 1a, 1b and 1c, and branching can be determined according to the resident selection of the living spaces 1a, 1b and 1c. The branching branch cable 80a which is not branched can be stored in the storage tube 30.

The optical cable 100 is disposed in a cable tray (not shown) installed in the building 1 and can transmit an optical signal to the living space.

5 to 8, an optical cable 200 according to the present embodiment includes a main tube 10, a branch tube 20, a storage tube 30, optical fibers 70a, 70b, and 70c, (80a, 80b, 80c), a tensioning portion (90) and a lid (12).

The structures of the main tube 10, the optical fibers 70a, 70b and 70c and the tension unit 90 according to the present embodiment are the same as those of the main tube, the optical fiber and the tension unit according to the embodiment of FIGS. 1 to 3 Hereinafter, a duplicate description will be omitted.

A plurality of branch tubes 20 are disposed between adjacent openings 11a, 11b, 11b, 11c and are connected to the outer peripheral surface of the main tube 10, respectively. The inside of the branch tube 20 is empty, and one end of each branch tube 20 is disposed adjacent to the openings 11a, 11b, and 11c. The length of the branch tube 20 is formed to be shorter than the length between the adjacent openings 11a and 11b. The inner peripheral surface diameter of the branch tube 20 may be approximately 1 mm to 5 mm. The diameter of the branch tube 20 may vary depending on the diameter of the branch cables 80a, 80b, 80c.

In general, the diameter of the branch tube 20 may be approximately 3 mm since the diameter of the optical cable (including the optical fiber and the plurality of coverings) installed in the building for the optical signal transmission in Korea is 3 mm.

The storage tube 30 is composed of a plurality of storage tubes 30 located between neighboring openings 11a, 11b, 11b, 11c and connected to the outer peripheral surface of the main tube 10, and the inside thereof is empty. One end of the storage tube (30) is spaced apart from the other end of the branch tube (20). The other end of the storage tube 30 is disposed adjacent to an opening portion 11b that is apart from the opening portion 11a adjacent to one end of the branch tube 20.

The inner peripheral surface diameter of the storage tube 30 is equal to the inner peripheral surface diameter of the branch tube 20. The branch tube 20 and the storage tube 30 are separated from each other, and a branch space 50 is formed therebetween. Since one branch tube 20 and one storage tube 30 are located between the neighboring openings 11a and 11b and 11b and 11c and neighboring openings 11a and 11b and 11b and 11c A branching space 50 is formed.

The branch cables 80a, 80b and 80c include optical fibers 81 for transmitting optical signals and aramid yarns 82 and cladding 83 for protecting the optical fibers 81. [ The outer peripheral surface diameter of the branch cables 80a, 80b, 80c may be 1 mm to 5 mm. If the diameter of the branch cables 80a, 80b, 80c is less than 1 mm, the branch cables 80a, 80b, 80c may be easily damaged during the branching process. The manufacturing cost due to the increase in diameter may increase.

The branch cables 80a, 80b and 80c have predetermined lengths, one end is located in the branch tube 20, and the other end is located in the storage tube 30. A part of the branch cables 80a, 80b, 80c is exposed through the branching space 50. [

A stopper (not shown) is disposed between the other end of each branch tube 20 and the branch cables 80a, 80b, 80c. The stopper prevents foreign substances such as rainwater and dust from flowing into the branch tube (20). The stopper can be made of silicone, rubber or the like. But the stopper can be omitted.

One end of the optical fiber 81 of the branch cables 80a, 80b and 80c is connected to the other end of the optical fibers 70a, 70b and 70c inserted into the branch tube 20. [ The aramid yarn 82 exposed in the sheath 83 of the branch cables 80a, 80b and 80c is discharged outside the branch tube 20 and bound to the outer circumferential surface of the main tube 10, Is again secured to the main tube 10 by fastening means 82a. The securing means 82a may be a tape, band, cable tie, or the like. However, the aramid yarn 82 may be fixed directly to the securing means 82a without being tied.

The length L1 of the aramid yarn 82 between the fixing means 82a and the cover 83 is smaller than the length L2 of the optical fiber 70a exposed in the main tube 10 and inserted into the branch tube 20 Respectively. When the other end of the branch cable 80a is pulled, the branch cable 80a becomes taut.

At this time, the length L1 of the aramid yarn 72 is shorter than the length L2 of the optical fiber 70a located in the opening 11a, so that the optical fiber 70a is not pulled. Damage that may occur in the connecting portion of the optical fibers 70a and 81 can be prevented by pulling the branch cable 80a (see Fig. 8). Although only the optical fiber 70a and the aramid yarn 72 of the branch cable 80a have been described in the above description, the same is true for the other optical fibers 70b and 70c and the aramid yarn 72 of the branch cables 80b and 80c Can be applied.

The lid 12 is located at each of the openings 11a, 11b and 11c and is made up of an inner member 121 and an outer member 122. The inner member 121 has strength, And protects the optical fibers 70a, 70b, and 70c located in the openings 11a, 11b, and 11c.

The outer member 122 can be made of a material that can be shrunk by applying heat, and can prevent rainwater or the like from entering the openings 11a, 11b, and 11c while fixing the inner member 121. [ The securing means 82a securing the aramid yarn 82 is covered by the lid 12.

The lid 12 prevents foreign substances such as rainwater, dust and the like from flowing into the main tube 10, the branch tube 20, and the storage tube 30.

On the other hand, the openings 11a, 11b and 11c do not penetrate the main tube 10 but pass through the partition wall separating the main tube 10 and the branch tube 20, 20 are connected to each other, the lid 12 may be omitted.

The following describes the operation of the optical cable described above.

The optical cable 200 has a length corresponding to the height of a building to be installed and has the same number of optical fibers 70a, 70b and 70c as the number of living spaces in the building. The number of branch cables 80a, 80b, 80c is also the same as the number of living spaces. The plurality of optical fibers 70a, 70b and 70c are inserted into the branch tube 20 through the openings 11a, 11b and 11c adjacent to the other ends thereof and are connected to the branch cables 80a, 80b and 80c have.

The optical cable 200 is disposed on the outer wall of the building, and one end and the other end of the tension portion 90 are fixed to the building. The connector 73 is connected to a terminal box connected to a communication provider.

When the optical cable 200 is installed in the building, the branch cables 80a, 80b and 80c are located adjacent to the living spaces. When a resident of a living space wants an optical signal provided by a communication company installing the optical cable 200, the branch cables 80a, 80b and 80c adjacent to the living space are connected to the living space.

For example, when the installer pulls a portion of the branch cable 80a exposed in the branch space 50, the branch cable 80a portion stored in the storage tube 30 of the branch cable 80a is pulled out. When the branch cable 80a is connected to a terminal located in a living space, an optical signal can be provided to the living space.

On the other hand, if the resident in the living space does not want the optical signal provided by the communication company installing the optical cable 200, the branch cable adjacent to the living space maintains the state of being located in the storage tube 30. The unused branch cable is stored inside the storage tube without being disturbed so much as it does not hinder the appearance of the building where the optical cable 200 is installed. Many of the features shown in the embodiments shown in Figs. 1 to 8 can be applied to this embodiment.

Next, an optical cable according to another embodiment of the present invention will be described in detail with reference to FIGS. 9 to 10. FIG.

FIG. 9 is a cross-sectional view showing an optical cable according to another embodiment of the present invention, FIG. 10 is an enlarged view illustrating a state in which a branch cable is branched in the first branch space of FIG. 9, In which the branched cable is branched in the second branch space.

9 to 11, the optical cable 300 according to the present embodiment includes a main tube 10, a branch tube 20, first to third storage tubes 40a, 40b, 40c, 70a, 70b and 70c, branch cables 80a, 80b and 80c, a cover 12 and a tension unit 90. [

The main tube 10, the branch tube 20, the optical fibers 70a, 70b and 70c, the branch cables 80a, 80b and 80c, the lid 12 and the part 90 according to the present embodiment, Is substantially the same as the embodiment shown in Fig.

The main tube 10 has a predetermined length and openings 11a, 11b, and 11c are formed at intervals along the longitudinal direction. The branch tube 20 is located between the adjacent openings 11a and 11b and 11b and 11c and is connected to the outer circumferential surface of the main tube 10. [ The optical fibers 70a, 70b and 70c transmit optical signals, one end is located outside the main tube 10, and the other end is located inside the main tube 10. If the lengths of the optical fibers 70a, 70b and 70c are different from each other, the other ends of the optical fibers 70a, 70b and 70c are adjacent to the openings 11a, 11b and 11c, And is exposed to the outside of the main tube 10. [ The branch tubes 20 are formed of a plurality of branch tubes 20 and are located between neighboring openings 11a and 11b and 11b and 11c and one end is adjacent to the openings 11a and 11b and 11c to form optical fibers 70a, 70c are inserted. The branch cables 80a, 80b, 80c are formed in a plurality of locations and are located between adjacent openings 11a, 11b, 11b, 11c, respectively. One end of each branch cable 80a, 80b, 80c is located inside each branch tube 20 and connected to each of the optical fibers 70a, 70b, 70c. The tensile portion 90 is connected to the outer circumferential surface of the main tube 10 and the openings 11a, 11b and 11c of the main tube 10 are covered by the lid 12.

The first to third storage tubes 40a, 40b and 40c according to the present embodiment store the branch cables 80a, 80b and 80c connected at one end to the optical fibers 70a, 70b and 70c.

The first storage tube 40a is composed of a plurality of openings 11a, 11b, 11b and 11c and is connected to the outer peripheral surface of the main tube 10, respectively. One end of the first storage tube 40a is composed of a first portion 41a spaced apart from the other end of the branch tube 20 and a second portion 41b spaced apart from the first portion 41a have. The first portion 41a and the second portion 41b are separated from each other, and a return space 42 is formed therebetween.

The second storage tube 40b is made of a plurality of pieces and is connected to the outer peripheral surface of each first storage tube 40a. The length of the second storage tube 40b is formed to be equal to the length of the first portion 41a of the first storage tube 40a. The second storage tube 40b is disposed in parallel with the first storage tube 40a.

The third storage tube 40c is made of a plurality of pieces and is connected to the outer circumferential surface of each branch tube 20 and is spaced apart from the second storage tube 40b. The third storage tube 40c penetrates the lid 12 located in each of the openings 11a, 11b, and 11c. The portion of the third storage tube 40c passing through the openings 11a, 11b and 11c is connected to the outer circumferential surface of the second portion 41b of the neighboring first storage tube 40a. The third storage tube 40c is located on the same line along the longitudinal direction with the second storage tube 40b.

Although not shown in the drawings, the second storage tube 40b and the third storage tube 40c may be connected to the outer circumferential surface of the main tube 10.

The second storage tube 40b and the third storage tube 40c are separated so that a first branch space 60a is formed therebetween and the branch tube 20 and the first portion of the first storage tube 40a And the second branch space 60b is formed therebetween. Portions of the branch cables 80a, 80b, 80c stored in the first to third storage tubes 40a, 40b, 40c are exposed in the first and second branch spaces 60a, 60b.

The other ends of the branch cables 80a, 80b and 80c connected to the optical fibers 70a, 70b and 70c are connected to the first portion 41a of the first storage tube 40a, Passes through the second storage tube 40b and the third storage tube 40c, and is redirected in the return space 42. The branch cable is stored in the first portion 41a, the second storage tube 40b, and the third storage tube 40c.

The first portion 41a of the first storage tube 40a and the second storage tube 40b are arranged in parallel so that when the branch cables 80a, 80b, 80c are turned in the return space 42, . This can damage the optical fiber 81. A guide member 43 having a curved surface in each return space 42 and guiding the branch cables 80a, 80b and 80c smoothly so that the optical fibers 81 can be bent smoothly in a curved shape without being bent at right angles, Respectively.

The following describes the operation of the optical cable described above.

When the optical cable 300 is installed on the outer wall of the building, the branch cables 80a, 80b and 80c are disposed adjacent to each living space. At this time, when a residential request for a living space requests an optical signal provided by a communication company that installed the optical cable 300, the branch cables 80a, 80b, and 80c adjacent to the living space are connected to the living space.

For example, when an optical signal is to be provided by a resident request, if the branch cable 80a exposed through the first branch space 60a is pulled and pulled, the branch cable 80a located in the third storage tube 40c And is discharged through the first branch space 60a. The branch cable 80a missing from the third storage tube 40c can be connected to a terminal (not shown) disposed in the living space and used primarily. At this time, a portion of the branch cable 80a is kept in the first portion 41a of the first storage tube 40a and the second storage tube 40b (see FIG. 7).

When the resident is not requested, the branch cables 80a, 80b and 80c are kept in the first to third storage tubes 40a, 40b and 40c. Thus, the appearance of the building where the optical cable 300 is installed is not hindered.

When the communication company is changed while the branch cable (80a) is pulled out from the third storage tube (40c), when the terminal device is installed by the changed communication company (B communication company), the branch cable (80a). Therefore, when the communication company re-opens to the communication company A while using the communication company B, since the length of the branched cable 80a cut by the communication company B is shortened, it is necessary to extend the length of the branch cable 80a. If the extension cable is not used, the optical cable installed on the outer wall can no longer be used. However, according to the present embodiment, when the re-opening A communication company pulls the branch cable 80a exposed through the second branch space 60b, the first portion 41a of the first storage tube 40a and the second storage tube 40b, The portion of the branch cable 80a stored in the second branch space 60b is pulled out through the second branch space 60b. The branch cable 80a missing through the second branch space 60b can be used secondarily by connecting to the terminal of the changed communication company disposed in the living space (see FIG. 11).

Even if the branch cable 80a which has been pulled out through the first branch space 60a is damaged, the first branch 40a and the second branch 40a of the first storage tube 40a are connected to each other through the second branch space 60b, The branch cable 80a is shortened and the extension cable (not shown) for extending the length of the branch cable 80a is not required, It is possible to simplify the branching operation. In addition, since the branch cable installed on the outer wall can be continuously used, the cost for installing the optical cable can be minimized.

Many of the features shown in the embodiments shown in Figs. 1 to 8 can be applied to this embodiment.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

1: Building 1a, 1b, 1c: Living space
100, 200, 300: optical cable 10: main tube
11a, 11b, 11c, 91a, 91b, 91c: opening portion 10a: cap
12: lid 121: inner member
122: outer member 20: branch tube
30: storage tube 40a: first storage tube
40b: second storage tube 40c: third storage tube
41a: first part 41b: second part
42: return space 43: guide member
50: branch space 60a: first branch space
60b: second branch space 70a, 70b, 70c, 81: optical fiber
71, 83: cloth 72, 82: aramid yarn
73: Connectors 80a, 80b, 80c: Branch cables
82a: fixing means 83: cloth
90: tensile part 91: tensile tube
92: Tension line

Claims (9)

A plurality of optical fibers positioned within the main tube and a tensile line positioned within the tensile tube, the plurality of optical fibers each having a diameter of 0.250 mm and the plurality of optical fibers Wherein the plurality of optical fibers are separated from each other by color or marking. The method of claim 1,
Wherein the main tube is formed with openings spaced along its longitudinal direction and one side of the optical fiber can be exposed to the outside of the main tube through the opening. The method of claim 1,
Wherein the tensile tube is formed with openings spaced along the longitudinal direction thereof. The method of claim 1,
A plurality of branch tubes connected to the main tube and positioned one by one between the adjacent openings,
A plurality of storage tubes connected to the main tube and positioned one by one between the adjacent openings, spaced apart from the branch tubes,
A branch cable connected to the optical fiber and located inside the branch tube and the storage tube,
Further comprising: 5. The method of claim 4,
Wherein the plurality of branch cables are formed in the same number as the openings and the optical fibers and are separated from each other, and each of the plurality of branch cables is divided into one branch tube and one storage tube Wherein one optical fiber is exposed through one opening and connected to one branch cable. 5. The method of claim 4,
A branching space is formed between the branching tube and the storage tube located between adjacent openings and a part of the branching cable is exposed in the branching space so that the operator can remove the branching cable located in the storage tube Can optical cable. 5. The method of claim 4,
And a cover covering the opening of the main tube,
Wherein the branch cable comprises an optical fiber connected to the optical fiber, an aramid yarn for protecting the optical fiber, and at least one cover, the aramid yarn being exposed to the outside of the branch tube, Optical cable fixed between. A main tube in which an interior is empty and a plurality of openings are formed at intervals along the longitudinal direction,
A branch tube connected to an outer peripheral surface of the main tube and positioned between the adjacent openings,
A first storage tube connected to an outer circumferential surface of the main tube and positioned between the adjacent openings and spaced apart from the branch tube and divided into a first portion and a second portion,
A second storage tube connected to an outer peripheral surface of the main tube and positioned between the adjacent openings,
A third storage tube connected to an outer circumferential surface of the main tube and spaced apart from the second storage tube by a distance,
A plurality of optical fibers positioned in the main tube,
And a branch cable which is disposed in the branch tube and the first to third storage tubes and has one end connected to the optical fiber,
. 9. The method of claim 8,
Wherein the branch cable is located inside the first to third storage tubes and is connected to the first storage tube and the second storage tube so that the branch cable can be smoothly bent and inflow when it is introduced into the second storage tube from the first storage tube, And a guide member disposed between the second storage tubes.

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