KR200396499Y1 - Optical termination panel - Google Patents

Abstract

The present invention relates to an optical terminal box for connecting and branching an optical cable, and to an optical terminal box 100 ′ having a structure capable of miniaturization and light weight and easy operation of an optical cable. The optical terminal box 100 'is attached to the tubular sleeve 120' inclined to the optical cable inlet and outlet 117 'on the lower side. Since the optical cable is easily drawn into or taken out of the optical terminal box 100 'through the inclined sleeve 120', workability is improved, and the incoming and outgoing optical cable inside the optical terminal box 100 'is exposed at its end. Since the optical fiber can naturally be guided into the empty space at the edge of the optical terminal box 100 ', the dressing process is easy and the optical terminal box 100' can be downsized. In addition, since the outer circumferential surface of the sleeve 120 'has a concave-convex shape, it is useful for preventing high temperature deterioration after the optical cable work by the heat shrink tube, and the recess provides a seating groove 121 in which the heat shrink tube fixing band can be seated. In the case of harsh installation environment, the heat shrink tube can be firmly fixed by the heat shrink tube fixing band, which is useful for reliable optical cable work. Furthermore, since the belt fixing piece for fixing the optical terminal box 100 'to the pole and the wall fixing member for fixing to the wall have a structure that can be detached from each other, it can secure aesthetics and cope with the installation environment more flexibly. have.

Description

Optical termination panel

The present invention relates to an optical terminal box for connection and branching of an optical cable, and to an optical terminal box for facilitating the operation of the optical cable that is drawn in or drawn out from the small and lightweight optical terminal box, and to facilitate the optical fiber fitting exposed from the optical cable.

In general, an optical communication system composed of optical cables and electronic devices is widely used in the communication industry that delivers a large amount of voice and non-voice data signals from telephone stations to optical subscribers. In addition, the optical cable forming the optical communication line can be interconnected or diverged to the optical subscriber transmission device using various types of optical connection material, the optical terminal box is the optical fiber in the optical cable in the optical transmission line on the optical subscriber side One of the subscriber end devices for distribution to optical subscribers so as to be interconnected with the transmission device on the subscriber side.

The optical terminal box is installed in the interior and exterior walls of the building of the optical subscriber building, poles or pontoons, and the optical fiber in the incoming optical cable is connected to the optical fiber of the single-core optical fiber cord (or optical jumper cord) to be distributed to the optical subscriber transmission device in the short distance. In addition, the remaining optical fibers in the optical cable are redistributed to the long-distance optical subscriber transmitter by being drawn out again in the form of the optical cable after the optical connection.

1 is a perspective view of such a conventional optical terminal box.

Referring to FIG. 1, the optical terminal box 100 is coupled to a main body 110 having a space portion 112 therein, the main body 110 and a hinge 115, and may be opened and closed by clamps 116a and 116b. The cover 111 is provided.

The main body 110 includes an optical cable inlet / outlet 117 to which a sleeve 120 having a cylindrical tubular shape is attached, and a single core branched from the optical cable to allow the optical cable to be introduced into or drawn out into the space 112. Adjacent the sleeve 120 and the optical fiber cord entrance and exit portion 118 formed on the lower outer surface to allow the optical fiber cord (or optical jumper cord) of the optical fiber cord (or optical jumper cord) to be distributed to a short distance optical subscriber transmitter (not shown). An optical cable fixing piece 142 for fixing the incoming and outgoing optical cables through the optical cable fixing band such as a tie band and positioned on the inner extension line, and an optical fiber protective support plate fixed inside to protect the optical connection point of the optical fiber and to process the optical fiber; 172, and a dressing processing section comprising a dressing guide piece 171a attached to the outside of the optical fiber protective support plate 172 to cover the optical jumper cord or the protective tube. The optical adapter fixing portion 141 is fixed to the front of the optical cable fixing piece 142 to fix the central tensile line in the optical cable, and the optical adapter 181 is fixed to facilitate the optical connection between the optical connectors. The bracket 180 is provided.

The optical terminal box 100 is attached to the pole, pontoon or optical subscriber building wall, the optical operation of such optical terminal box will be described with reference to FIG.

Referring to Figure 2, the incoming optical cable (C) is pulled down along the electric pole (B) or pontoon bend within the allowable curvature range of the optical cable (C) and then a cylindrical shape attached to the lower side of the optical terminal box 100 Is inserted into the sleeve 120 of the optical terminal box 100, the optical cable (C) is fixed to the sleeve 120 by the heat shrink tube (FL) is pressed, fixed to the tie band (T), etc. inside the optical terminal box (100) It is fixed to the optical cable fixing piece 142 by.

The optical cable (C) introduced into the optical terminal box 100 is covered with a protective tube (P) to protect the exposed optical fiber (F) by removing the outer shell, etc. This protective tube is again inside the optical terminal box (100) It is lengthened by the length guide piece 171a, and is drawn in to the optical fiber protective support plate 172.

The optical fiber F in the protective tube is optically connected via a single optical fiber cord (or optical jumper cord) and an optical connector (for example, a fusion splicer) for distribution to a near-field optical subscriber separately. The connected optical fiber cord is drawn out to the outside of the optical fiber protective support plate 172 to be mounted on the guide guide piece 171a, and then through the optical adapter 181 or immediately to the outside through the optical fiber cord entrance 118. Distribution is done to subscribers. Here, the optical fiber cord entrance and exit portion 118 is usually covered with a flexible tube to provide waterproofing and protection. The other optical fibers in the protection tube are optically cabled again for distribution to long-range optical subscribers and drawn out of the optical terminal box 100. For this purpose, the optical fibers are individually connected to the optical connectors within the optical fiber protective support plate 172, respectively. After being covered with a protective tube (P) and drawn out to the outside of the optical fiber protective support plate 172 and fitted along the dressing guide piece 171a, the optical cable at the end is drawn out through the sleeve 120 of the optical terminal box 100. Here, the optical cable is fixed to the optical cable fixing piece 142 by a tie band or the like inside the optical terminal box 100, and is pressed again and fixed to the sleeve 120 by a heat shrink tube (FL) outside the optical terminal box 100 again. It is bent within the permissible curvature and pulled up along the pole or bar (B) for distribution to long-range optical subscribers.

The illustrated example shows one incoming optical cable C and one single-core fiber cord J for convenience of description.

However, the optical fibers F in the lead-out optical cable C naturally fall within the minimum allowable curvature range along the empty space (that is, the edge portion) between the accessory parts inside the optical terminal box 100 after the protective tube P is covered. The dressing guide piece 171a is disposed at this edge for this purpose. In addition, the maximum allowable angle A of the optical fiber protective tube between the optical cable inlet and outlet 117 and the initial length guide piece 171a should be within the minimum allowable curvature range of the optical fiber F. For this reason, there is a limit in the minimum distance L1 between the optical cable inlet and outlet 117 and the first length guide piece 171a, and for this reason, the optical terminal box 100 may have a practically large size.

In addition, even in the optical terminal box designed by the maximum angle (A) and the minimum distance (L1) in the optical terminal box of the small size and light weight trend, in the conventional optical terminal box 100, the delicate optical fibers (F) exposed at the end of the optical cable (C) There is a problem that the workability is also lowered because the fear of breakage due to sudden fiber bending during the operation is large and requires attention to the optical fiber work.

In addition, when looking at the optical cable (C), for example, a loose tube type optical cable, a loose tube having a plurality of optical fibers around the central tension line (C1) is appropriately disposed in a circular shape, wound with a outer winding tape and aluminum tape, and then coated with PE. Surrounded by As such, the optical cable is not only easily bent but also receives a large elastic force even when it is bent because it is composed of a central tension line or a plurality of loose tubes. However, the optical cable must be bent in a "U" shape, because the optical cable must be laid in the optical terminal box again on the pole. However, this task is not only easy, but also requires a rather large dressing space (L2) outside the optical box because it must bend gently within the minimum permissible curvature range where the optical cable does not break, which not only hurts the aesthetics, It has been pointed out that it lowers workability, interfering with related work.

In addition, since it is bent in a "U" shape after the operation, there is a problem that the heat shrink tube (FL), which is thermocompression-bonded to the optical cable and the sleeve because the optical cable is somewhat large elastic force acts. In particular, under bad conditions such as summer when the surface temperature rises to 80 ° C-90 ° C, the heat shrinkable tube (FL) is deteriorated due to high temperature, causing a problem that the optical cable cannot be firmly fixed.

3 is a rear perspective view of a conventional optical terminal box.

Referring to FIG. 3, the optical terminal box 100 includes four fasteners 130 each having upper and lower left and right sides attached to the rear surface thereof so as to be fixed to an electric pole, a pontoon, or a wall.

The fastener 130 has a belt fixing piece 132 formed with a belt passing hole 132a so that the fixing belt can be fitted therein, and extends through the belt fixing piece to protrude outwards, and a through hole 131a is formed. It consists of a protruding fixing piece 131.

The optical terminal box 100 having such a structure is preferable because it avoids a dedicated optical terminal box such as a wall surface or a pole and can be selectively installed in accordance with a working environment such as a wall surface or a pole or a pontoon. That is, when the optical terminal box 100 is installed on the wall, the optical terminal box 100 can be fixed by fitting a fastening member such as a bolt or nail into the through hole 131a of the protruding fixing piece 131. In addition, when the optical terminal box 100 is installed in a pole or a pontoon, the belt can be fixed to the pole or the pontoon after the fixing belt is inserted into the belt passing hole 132a.

However, since the projecting fixing piece 131 of the conventional optical terminal box 100 must be fixed with a fastening member in the state in which the optical terminal box 100 is brought into contact with the wall, it cannot but protrude from the rear surface of the optical terminal box. Relevant members interfered with each other by the fixing piece 131, which was cumbersome for storage, maintenance and operation of the optical terminal box 100. In addition, the technology has been developed in the trend of miniaturization and light weight of the optical terminal box 100, according to the fixture 130 of this structure, there is a problem that the protruding length of the protruding fixing piece 131 should be increased.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical terminal box of the structure that can be secured by the compactness, ease of operation or ease of installation due to small size and light weight.

In order to achieve the above object, an optical terminal box according to the present invention includes a main body having an optical fiber connection storage part for protecting an optical connection point between an optical cable inlet and an optical fiber, and an optical cable to be introduced or drawn out by a heat shrink tube. An inclined sleeve at the optical cable entry and exit. Here, the outer circumferential surface of the sleeve is preferably formed with a groove so that the heat shrink tube fixing band can be seated.

Furthermore, the optical terminal box according to the present invention, the optical cable fixing band is inserted into the optical cable fixing band for fixing the optical cable and disposed in the main body to be inclined in the same direction as the sleeve, and the sleeve in front of the fixing piece and It may be disposed to be inclined in the same direction and may further include a center tension line fixture for fixing the center tension line in the optical cable.

The main body preferably further includes a belt fixing piece into which the fixing belt is fitted, and a wall fixing member detachably attached to the belt fixing piece.

Hereinafter, an optical terminal box according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view illustrating an optical terminal box according to the present invention.

Referring to FIG. 4, the optical terminal box 100 ′ according to the present invention is coupled to a main body 110 having a space portion 112 therein, the main body 110 and a hinge 115, and clamps 116a and 116b. It is provided with a cover 111 that can be opened and closed by the).

On the lower side of the main body 110, the optical cable can be drawn into or out of the space 112, and the tubular sleeve 120 'for fixing the optical cable by the heat shrink tube is inclined. The optical fiber cable entry / exit 117 'and the optical fiber cord entrance 118 for distributing the single-core optical fiber cord (or optical jumper cord) branched from the optical cable to a short distance optical subscriber transmitter (not shown) are provided. It is provided. Here, the outer circumferential surface of the sleeve 120 'may form a concave-convex cross-sectional shape, and the recess provides a seating groove 121 so that the sleeve 120' may be tightly fastened with a heat shrink tube fixing band after the heat shrink tube is covered. do. And, the optical fiber cord entrance and exit 118, for example, a flexible tube is fitted and fixed with two to three fastening screws (N) so that the optical jumper cord or the like can be distributed to the external optical subscriber, which is because it is usually made The description will be omitted.

In the space 112 inside the main body 110, an optical cable fixing piece 142 ′, a central tension line fixing fixture 141 ′, a dressing processing unit, an optical fiber protective support plate 172, and an adapter mounting bracket 180 are provided. do.

The optical cable fixing piece 142 ′ is for firmly fixing the optical cable introduced or drawn out through the sleeve 120 ′ so as not to flow in the main body 110. It may be partially protruded in the form of a long annular shape, and is disposed to be inclined substantially in the same direction as the sleeve 120 '.

The center tension line fixture 141 'is to allow the center tension line in the optical cable to be drawn in or drawn out to be fixed, and is disposed to be inclined in the same direction as the sleeve in front of the optical cable fixing piece 142'. Here, the center tension line fixture 141 ′, as shown in the example, may be composed of a fixture body 141a and a fixing screw 141b. That is, the fastener body 141a is formed with a center tension line fitting hole penetrated back and forth, and a screw hole is formed on the upper side so that the center tension line inserted by the fixing screw 141b is tightened from the top. .

The optical fiber protective support plate 172 is an optical connection between the incoming and outgoing optical fiber by an optical fiber connector such as a fusion splicer. The optical fiber protective support plate 172 shows an example of an optical fiber connection storage unit for protecting such an optical connection point. Since the connection storage part is provided variously in the shape and structure, the detailed description is abbreviate | omitted.

The sheathing processing portion is arranged around the optical fiber protective support plate and consists of cramped sheathing guide pieces 171a for guiding the optical jumper cord or the protection tube to be sheathed.

As described above with reference to FIGS. 1 and 2, the optical adapter mounting bracket 180 is fixed inside to allow the optical adapter 181 to be fixed to facilitate optical connection between the optical connectors.

5 is a front sectional view showing a state in which the optical terminal box is installed on the electric pole in accordance with the present invention made the optical cable work.

Referring to FIG. 5, the incoming optical cable or the drawn optical cable is pulled down along the electric pole B in which the optical terminal box 100 'is installed, and the optical cable C has a large diameter heat shrink tube FL in advance. In the fitted state, it passes through the inclined sleeve 120 'and is introduced into the optical terminal box 100'. At this time, since the optical cable (C) can be drawn into the inclined sleeve (120 ') unlike the prior art, it is more naturally bent in the allowable curvature range of the optical cable (C) can be drawn into the optical terminal box (100') The operation is convenient and the fear of breakage due to rapid fiber bending is also reduced, and the length L4 that is inserted down the optical terminal box 100 'is also shortened, so that the dressing space is small and the workability and aesthetics are also improved.

The optical cable C drawn out into the optical terminal box 100 ′ removes the outer skin and the like by the stripping operation, thereby exposing the optical fiber F and the central tensile line C1 therein.

The optical cable is fixed to the outside of the optical terminal box 100 'by the heat shrink tube FL. That is, a heat shrink tube having a relatively large diameter is previously fitted to the sleeve 120 '. When heat is applied to the heat shrink tube FL, the heat shrink tube may be contracted and the optical cable C may be pressed and fixed to the sleeve 120'. Here, since the sleeve 120 'is inclined, the optical cable C may be naturally bent. As a result, the distribution of tensile force acting on the heat shrink tube FL is more uniform, and the optical cable C and the sleeve 120' Since the contact area becomes wider, the shear force due to the bending of the optical cable C may also be relatively small. Therefore, even under bad conditions such as summer, the heat shrinkable tube FL is less likely to be deteriorated due to high temperature. In particular, the outer circumferential surface of the sleeve has a concave-convex cross-sectional shape. Since the heat shrink tube (FL) is also thermocompressed along the concave-convex cross section of the sleeve 120 ', the resistance to external force is also increased, resulting in sudden external force or deterioration in summer. It is advantageous to increase the resistance to. Furthermore, since the recess of the uneven end surface of the outer circumferential surface of the sleeve 120 'provides the heat shrink tube fixing band seating groove 121 after the heat shrink tube FL is covered, the optical cable C is fixed with the heat shrink tube FL. Since the heat shrink tube fixing band may be tightly fastened to the seating groove 121, anxiety concerns about looseness of the heat shrink tube (FL) can be eliminated even in the case of a severe external force in the summer and a sudden external force. Very useful.

The optical cable C is fixed in the optical terminal box 100 'by selectively fixing the central tension line C1 and the optical cable C as necessary. That is, the exposed center tension line (C1) is to be fitted to the fitting hole of the fastener body (141a) and can be fixed by tightening the fixing screw (141b), and also the optical cable fixing piece 142 'of the rectangular ring-shaped optical cable Pull and fix the optical cable fixing band 144 so that the end of the optical cable in contact with the fixing piece while the fixing band 144 is fitted.

Then, the optical fibers exposed from the optical cable (C) are covered with a protective tube (P) and are provided in the optical fiber protective support plate (172) after being dressed in a state of being put into the clamping guide piece (171a). The optical connection between the optical fibers is made by an optical fiber connector such as a fusion splicer, which optical connection point by the optical fiber connector is received and stored in the optical fiber protective support plate 172 and the optical fibers F are within the minimum allowable curvature range. It is stored and stored. Accordingly, some optical fibers of the incoming optical cable may be optically connected again, drawn out to the optical cable, and redistributed to the long-distance optical subscriber side. And optically connected to the optical fiber cord inlet and outlet 118 immediately after being connected by the female guide guide (171a) and then interconnected by the optical connector via the optical adapter 181 of the optical adapter mounting bracket 180 Is made through withdrawal.

As described above, components such as an optical fiber connection storage unit 172 or an optical adapter mounting bracket 180 for protecting the optical connection point are generally mounted in the inner space of the main body, and in particular, although not shown, an optical coupler or optical Various components such as a multiplexer (e.g., WDM: Wavelength Division Multiplexing) and mounting brackets thereof can be installed. If you want to filter the incoming and outgoing optical fiber, a space to avoid interference with these internal accessory parts (preferably Is preferably at the edge). In the optical terminal box 100 ′ according to the present invention, since the sleeve 120 ′ into which the optical cable is drawn out has an inclined structure, the pulling direction of the optical cable C also naturally faces the edge. Therefore, even in the case of optical terminal box of the same size, by inclining the sleeve 120 'as in the present invention, it is possible to naturally guide the protective tube (D) from the optical cable (C) to the inner edge of the body and to bend the optical fiber sharply. In addition, there is a need for a minimum allowable radius of curvature of the optical fiber, and thus the space for internal dressing (for example, the distance L3 from the optical cable to the first dressing guide piece) can be made small. As a result, the size of the optical terminal box 100 ′ may also be reduced, thereby miniaturizing the optical terminal box.

6 is a rear perspective view of the optical terminal box according to the present invention, Figure 7 is an exploded perspective view of the fastener in Figure 6, and Figure 8 is a plan view for showing a state installed in the pole by the belt fixing piece.

6 and 7, the optical terminal box 100 ′ includes a fastener 130 ′ in which the belt fixing piece 132 ′ and the wall fixing member 191 are detachable from each other.

The belt fixing piece 132 ′ has a gap formed between a fixing portion 133 ′ whose both ends are fixed to a rear surface of the optical terminal box 100 ′ by welding, and a rear surface of the optical terminal box 100 ′. The optical terminal box fixing belt 192 is bent so that it can be fitted with a protruding pole contact portion (132a '). The electric pole contact portion 132a 'has a concave shape (see Fig. 8) to have a wider contact area when fixed to the electric pole B, and a screw engaging hole 132b' is formed.

The wall fixing member 191 is made of a plate-shaped bar, the screw coupling hole (191a) is formed at a position corresponding to the screw coupling hole (132b ') of the pole contact portion (132a'), both ends of the wall fixing The through hole 191b is formed.

When the optical terminal box 100 'is to be installed on the pole or the column B using the fixture 130', the optical terminal box fixing belt 192 is inserted into the belt fixing piece 132 'and then the fixing belt is inserted into the belt fixing piece 132'. The optical terminal box 100 ′ is fixed by pulling 192 to fix the electric pole B. Here, since the belt fixing piece 132 ′ is not exposed to the outside from the rear surface of the optical terminal box 100 ′, the belt fixing piece 132 ′ is convenient because interference does not occur during storage, movement, and work.

And, if you want to fix the optical terminal box (100 ') on the inner and outer walls of the building other than the electric pole depending on the installation environment, the optical terminal box (100') by combining the belt fixing piece 132 'and the wall fixing member 191 with each other. That is, the bolt 11 and the nut 12 in a state in which the screw coupling hole 191a formed in each of the electric pole contact portion 132a 'and the wall coupling member 191 of the belt fixing piece 132' communicate with each other. After fixing to each other), it is fixed to the through-holes (191b) formed at both ends of the wall coupling member 191 by a fastening member such as screws or nails. Here, in the case where the length between the installation of the optical terminal box 100 'is variable, simply change the length of the wall fixing member 191 to be large or small, so that it can be used with the belt fixing piece 132', the optical terminal box 100 ' Even if this installation environment is poor, there is an advantage that can be installed more freely.

The above has described the optical terminal box in more detail as one embodiment according to the present invention, but the present invention is not limited thereto, and various modifications and changes may be made by those having ordinary skill in the art. Therefore, the technical scope of the present invention should be interpreted by the following claims.

As such, in the optical terminal box according to the present invention, the optical cable that is drawn in and out is naturally bent and drawn into the optical terminal box because the sleeve is obliquely attached, so that the operation is convenient and the fear of breakage due to rapid fiber bending is also reduced. The length of it is shortened, so the aesthetics are better after work, and there is less fear that it will deteriorate due to high temperature deterioration even after fixing the optical cable by heat shrink tube. Because of this structure, the anxiety about loosening of the heat shrink tube can be solved even in the case of the severe conditions in the summer and the sudden external force, and there is no need to abruptly bend the optical fiber from the optical cable inside the optical terminal box. Convenience as well as the minimum allowable radius of curvature And free the possible implications blossomed OPTICAL jacks miniaturization, OPTICAL jacks also can be used to separate the fastener attached to the back surface for fixing pole and one for wall fixing becomes good appearance after work is beneficial can flexibly cope with harsh for installation.

1 is a perspective view showing an example of a conventional optical terminal box,

2 is a cross-sectional view showing the optical cable operation is installed in the optical terminal box of FIG. 1,

3 is a rear perspective view of FIG. 1;

4 is a perspective view showing an optical terminal box according to the present invention,

Figure 5 is a cross-sectional view showing the optical cable operation is installed in the optical terminal box Jeonju according to the present invention,

6 is a rear perspective view of the optical terminal box according to the present invention,

7 is an exploded perspective view of the fixture in FIG. 6, FIG.

8 is a plan view of the optical terminal box according to the present invention installed on the pole.

-Explanation of terms for main parts of attached drawings-

100, 100 '; Optical terminal box 110; main body

111; Cover 112; Space

115; Hinges 116a, 116b; Catch

117; Optical cable entry and exit 118; Fiber optic cord doorway

120, 120 '; Sleeve 130, 130 '; Fixture

131; Protrusion fixing piece 141; Core tensioner fixture

142; Optical cable fixing 171; Dress processing department

171a; Woman's Guide 172; Fiber optic protective plate

180; Adapter mounting bracket 191; Wall fixing member

192; Optical terminal box fixing belt

Claims (5)

A main body having an optical cable entry / exit and an optical fiber connection storage portion for protecting an optical connection point between the optical fibers; And An optical terminal box for fixing the incoming or outgoing optical cable by the heat shrink tube, and comprising an inclined sleeve in the optical cable inlet and outlet. The method of claim 1, The outer circumferential surface of the sleeve, Optical terminal box characterized in that the groove is formed so that the heat-shrink tube fixing band can be seated. The method of claim 2, An optical cable fixing piece fitted inside the main body such that an optical cable fixing band for fixing the optical cable is inserted and inclined in the same direction as the sleeve; It is disposed inclined in the same direction as the sleeve in front of the fixing piece, the center tension line fixture for fixing the center tension line in the optical cable; optical terminal box further comprises. The method according to any one of claims 1 to 3, The main body, The optical terminal box further comprises a belt fixing piece to which the fixing belt is fitted, and a wall fixing member detachable from the belt fixing piece. The method of claim 4, wherein Optical terminal box, characterized in that the pole contact portion of the belt fixing piece is formed in a concave shape.