KR100750350B1 - The small fiber distribution frame used in the home distribution frame and an establishing method there of it - Google Patents

Abstract

The present invention is a Stand Alone Type (FDF) fiber distribution frame (FDF) and a small light distribution using the same for a special grade of the FTTH (Fiber To The Home) and the newly established high-speed ICT certification system. It is about the installation method of a ship.

The present invention has a lower space based on a main body 10a having a small light distribution cover 12 on one side, a splice tray cover 20 detachable from the main body 10a, and a splice tray cover 20. It includes an optical cable entry portion 11, an optical cable fixing groove 15, a sleeve holder 19b for fixing the heat shrink sleeve 19a for fusion splicing protection, an optical cable 51 and a PVC coating 52, and a single coated pigtail 50. Cable management ring (17) for rearranging and rearranging is formed, and a plurality of continuous optical adapters (30) can be mounted in the transverse direction on the upper surface and can be detachably attached to the inner central portion of the small optical distribution box (10). The adapter plate 31, which is fixed to arrange the optical adapter 30 in a buried form, is arranged in a vertical stacking structure, and the optical cable 51a inserted into the small optical splitter is tightly buffered. Pigtail (one-sided nose) PVC sheath (63) and aramid yarn (65), which are not buffering material, are removed. Boots (51) have a shorter length, smaller outer diameter, and less self-elasticity. The tail (Pig Tail, one end code: 50) is connected to the Fusion Splicing method of the optical cable staring method, and is mounted on the side of the completed small optical distribution box main body 10a and the main body of the generation terminal box 200 By fixing in the vertical direction on the bottom surface 201, the optical adapter 30 is also arranged in the vertical direction, and the main body to be detachable and vertical rotation on the bottom surface 201 of the generation terminal box (200). It is characterized in that it comprises a hinge-type vertical fixing bracket 70 and fitting vertical fixing bracket 80.

Light distribution box, adapter plate, sleeve holder, generation terminal box

Description

The small fiber distribution frame used in the home distribution frame and an establishing method there of it}

1 is an exploded perspective view of a small light distribution box of the present invention in an open state.

Figure 2 is a perspective view showing the working state of the small light distribution box according to the present invention.

3 is a view showing a conventional tight buffer type pigtail.

Figure 4 is a view showing a PVC coated single coated pigtail according to the present invention.

5 is a perspective view showing the appearance of a small optical distribution box.

6 is a perspective view showing the hinged vertical fixing bracket 70.

7 is a perspective view of a vertically fixed state in the bottom surface 201 of the generation terminal box 200 limited effective space by using a hinged vertical fixing bracket (70).

8 is a state in which the small light distribution box is rotated perpendicularly to the bottom surface 201 of the generation terminal box 200 by using a hinged vertical fixing bracket 70, and the rotating and small light distribution box cover 12 is opened. Perspective view.

     9 is a side view showing a state in which the small light distribution box is rotated after being vertically fixed to the bottom surface 201 of the generation terminal box 200 by using a hinged vertical fixing bracket 70.

Figure 10 is an exploded perspective view showing the fitting vertical fixing bracket 80 fitting.

     Figure 11 is a perspective view showing a state fixed vertically to the bottom surface 201 of the generation terminal box 200 using the fitting customized vertical fixing bracket 80.

12 is a side view showing a state in which the fitting vertical fixing bracket 80 is installed.

FIG. 13 is a perspective view showing a state in which the small light distribution box of the present invention is fixed in a horizontal structure in a single shape on the bottom surface 201 of the generation terminal box 200. As shown in FIG.

 <Description of the code | symbol about the principal part of drawing>

      10: Small light distribution box 50: PVC coated single coated pigtail

70: hinged vertical fastening bracket 80: fitting customized vertical fastening bracket

200: generation terminal box 201: bottom surface

The present invention relates to a small optical distribution box for generation terminal box and a method for installing a small optical distribution box using the same for a special grade that is FTTH (Fiber To The Home) and newly established high-speed information and communication building certification system. The present invention relates to a small light distribution box used for a generation terminal box for reducing installation space by installing a distribution box in a vertical direction and a method of installing the small light distribution box using the same.

In January 2004, the government improved the high-speed information and communication building certification system and established a special grade. The high-speed telecommunication class is based on the optical cable 4 core (more than 2 cores) and one UTP cable to the household terminal box of each apartment, and the equipment such as home server and home gateway in the living room. By installing the preliminary piping for the connection with the network, various services such as broadcasting, communication convergence, and home networking have been implemented.

As a result, the household terminal box of each household has become an important key element for smoothly performing the above service. However, the generation terminal box is limited in the effective space, and there are many limitations in connecting to various types of optical transmission and reception devices using the optical patch code after forming an optical cable introduced into the generation terminal box in which the effective space is limited. In detail, first of all, there are limitations in forming an optical cable due to limited effective space, and also in fixing an optical distribution box in a generation terminal box.

Therefore, it has been desired to provide a single small optical distribution box having general versatility in a star clustering method and a fixing method in installing a small optical distribution box in a generation terminal box.

The present invention has been made to solve the above-mentioned problems, and in particular, when forming an optical cable introduced in a generation terminal box having a limited effective area and then connecting the optical cable with various types of optical transmitting and receiving devices using an optical patch code, It is not limited by the construction method, fixing method of small optical distribution box, effective space of household terminal box, and is connected to infrastructure related to optical cable fusion splicing method widely formed in Korea. It is an object of the present invention to provide a design structure and a fixed structure of a general-purpose single light distribution box that can contribute to the activation.

In addition, the present invention is a PVC sheath rather than a pigtail (Pig Tail, one-piece code: 60) made of a tight buffer cable (Tight Buffered Cable: 62) of the optical cable introduced into the generation terminal box to achieve the above object (63) and aramid yarn (65), which is a buffer material, are removed, and the boot (51) is short, the outer diameter is small, and the self-elastic force is PVC coated single coated pigtail (Pig Tail, one-piece code: 50) It connects by Fusion Splicing method among star formation methods and provides a design structure that can easily configure the minimum radius of curvature of the optical cable in the small optical distribution box and at the same time make the optical distribution box small.

In addition, based on the splice tray cover, the lower space includes an optical cable inlet, an optical cable fixing groove (15), a sleeve holder (19b) for protecting the fusion splicing point, an optical cable (51a), and a PVC coated single coated pigtail (50). The cable management ring 17 for the upper space by providing the optical adapter 30 and the adapter plate 31 in a vertical laminated structure rather than a horizontal structure to provide a design structure that can be integrated, miniaturized, slim.

     In addition, the optical adapter 30 and the adapter plate 31 are designed in a detachable structure to meet various environments such as fusion splicing, connector splicing, and polishing method according to the working environment and economic aspects. It does not have a structural dependency on the transceiver and provides a design structure of a general-purpose, single-type light distribution box that can be fixed alone using a piece bolt.

The bottom of the generation terminal box is combined with the small type optical distribution box of the work type completed as described above by combining the hinge type vertical fixing bracket or the customized vertical fixing bracket with each other according to the effective space of the limited household terminal box and the conditions of the fixed structure. By fixing vertically from the vertical distribution of the small light distribution box, vertical rotation, detachable, it is possible to open the small light distribution box cover provides a design structure that can maximize the effective space of the generation terminal box.

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

According to the present invention, a main body 10a having a small light distribution box cover on one side, a splice tray cover detachable to the main body, and a plurality of continuous optical adapters can be mounted in a transverse direction and attached to and detached from an inner central portion of the small light distribution box. The adapter plate is fixed so as to allow the optical adapter to be disposed as a buried structure, and is mounted on the side of the main body 10a to fix the main body vertically in the generation terminal box so that the optical adapter is also arranged in the vertical direction. It is characterized in that it comprises a hinge-type vertical fixing bracket to be detachable from the bottom surface of the generation terminal box. Hereinafter, the present invention will be described in detail.

Figure 1 is an exploded perspective view of the small light distribution box cover 12 of the present invention in an open state, Figure 2 is a perspective view showing the working state of the small light distribution box according to the present invention, the lower back of the small light distribution box 10 The optical cable inlet part 11 for the optical cable 51a inlet and the optical cable fixing groove 15 for fixing the optical fiber cable inlet are formed, and the optical cable 51a guided to the optical cable inlet part 11 is the optical cable fixing groove. The fixing means 15 is fixed to the bottom of the small light distribution box 10 by fixing means such as a cable tie 54 or the like.

     The optical cable inlet 11 and the optical cable fixing groove 15 for the optical cable 51a are basically formed one by one in the lower left and the right of the rear of the small optical distribution box 10, but the number of the optical cables 51a or the optical cable 51a In order to induce a smooth rotation direction of the core wire 53 and the PVC coating 52, the single-coated pigtail 50, the optical cable inlet portion 11a and the optical cable fixing groove 15a at the bottom center of the rear side of the small optical distribution box 10. Can be further configured.

The optical cable 51a introduced into the generation terminal box 200 is not a tight buffer type pigtail made of a tight buffer optical cable 62 shown in FIG. 3, but a PVC sheath. (63) and the aramid yarn 65, which is a buffer material, are removed, and the boot (51) has a short length, a small outer diameter, and a small self-elastic force. Pig Tail, one end code: 50) is connected to each other by Fusion Splicing method among the optical cable staring method.

     By connecting the PVC coating 52 single-coated pigtail 50 and the optical cable 51a as described above, the smallest radius of curvature of the optical core 53 inside the small optical distribution box 10 can be smoothly constructed and connection loss can be achieved. Can be minimized. In addition, a sleeve holder 19b and a cable management ring 17 are formed between the bottom of the small light distribution box 10 and the bottom of the splice tray cover 20. The fusion splicing point protection is achieved by the sleeve 19a, and the heat shrink sleeve 19a for the fusion splicing point protection is fixed to the sleeve holder 19b according to the type of optical fiber and the priority of the line number.

     In addition, the dressing of the optical cable 51a and the PVC-coated single-coated pigtail 50 made by the above operation is made in consideration of the radius of curvature and insertion of the optical adapter 30 in the cable management ring 17.

     The splice tray cover 20 forms a bent portion 21 having the same height as the spacer 19 fixed to the center of the bottom surface of the small light distribution box 10 on the front surface. Splice tray cover 20 is maintained at a constant height by the spacer 19 and the bent portion 21 is pushed to the inner wall of the rear side of the small optical distribution box 10, the coupling formed in the center of the splice tray cover 20 The ball 25b is fixed to the spacer 19 by using the coupling screw 1.

By fixing the splice tray cover 20 to the spacer 19, the optical cable 51a, the cable management ring 17 arranged together, and the sleeve holder 19b for fusion splicing protection are protected from external hazards. Protection is achieved.

In addition, when the splice tray cover 20 is pushed and fixed to the rear inner wall of the small light distribution box 10, the rear surface of the splice tray cover 20 and the left and right inner walls of the rear surface of the small light distribution box 10 are fixed. The yen outlet (2) is formed, and through this outlet (2), the PVC coating (52) fused and single coated pigtail (50) fusion-connected with the optical cable (51a) can be inserted and connected to the optical adapter (Adapter: 30). Lose.

       In addition, the optical adapter 30 is fixed to be positioned at a predetermined interval on the adapter plate (Adapter Plate) 31, the upper surface of the splice tray cover 20 on the lower end of the adapter plate 31 including the optical adapter 30 There is a fastening hole (not shown) corresponding to the fixing hole 23 formed in the part, and is fixed in a structure that can be attached and detached using a fixing member 26 such as a screw.

As described above, the small light distribution box 10 of the present invention can be efficiently applied by selecting various types of optical adapters 30 and adapter plates 31 as necessary.

That is, depending on the type of the optical adapter 30 and the adapter plate 31, as well as fusion splicing, a connector connection method such as SC, ST, MT-RJ, etc., or SC, ST, FC, VF-45 (SG Type) General connector type such as LC and polishing and optical fiber star forming method such as special type polishing can be applied.

In addition, since the optical adapter 30 and the adapter plate 31 are fixed to the inner center portion of the small light distribution box 10 in a buried form, it is possible to compensate for the disadvantages of the external exposure structure of the optical adapter 30. When the optical adapter 30 is formed of an external exposure structure, there are various problems.

      In addition to the optical cable 51a, many types of cables related to voice, data, and video are introduced into the generation terminal box 200. When the optical adapter 30 is exposed, the optical adapter may be affected by work related to other types of work. The dust cap 32 may be damaged or the dust cap 32 to block the inflow of dust from the outside may be separated from the optical adapter 30, thereby causing attenuation of the optical signal due to the inflow of pollutants such as dust.

    As described above, the compact optical distribution box 10 according to the present invention has an optical cable inlet portion 11, an optical cable fixing groove 15, and a sleeve holder for fusion splicing protection at a lower portion of the splice tray cover 20. (19b), cable management ring (17) for dressing arrangement for the optical cable (51a) and PVC coating (52) single-covered pigtail (50), the optical adapter (30) and the adapter plate (31) on the upper surface horizontally It is possible to integrate, miniaturize and slim by arranging in a vertical stacking structure instead of an integrated arrangement structure.

       The rear side of the small optical distribution box 10 forms a bent portion 14 which is bent vertically from the bottom surface of the small optical distribution box 10 and is again vertically bent inward, and the bent portion is coupled to a hinge 13. The two coupling holes (not shown) which are made into the objective are formed, and they couple together using the coupling screw 2a.

       The hinges 13 are again bonded to each other using spot welding on the inner bottom surface of the small light distribution cover 12. The small light distribution box cover 12 connected to the small light distribution box 10 by the hinge 13 can be rotated up and down, and one coupling hole formed at each of the upper left and right sides of the small light distribution box cover 12 ( 25) corresponds to the coupling hole (25c) formed on the left and right of the fixing projection (25a) of the top of the front portion of the small light distribution box 10 is coupled to each other using a coupling screw (3).

     In addition, the small light distribution box cover 12 is a hinge 13 type when the small light distribution box 10 is assembled with the hinge type vertical fixing bracket 70 and fixed to the bottom surface 201 of the generation terminal box 200. Form an open and close structure.

In addition, the small light distribution box cover 12 is a hinge 13 when it is fixed to the bottom terminal 201 of the generation terminal box 200 in the form of a customized vertical fixing bracket 80 or a small light distribution box 10 alone. In the form having a fixing means by a type or a screw, the opening and closing structure and shape may be changed according to the fixing environment inside the generation terminal box 200.

     As shown in FIG. 5, the small light distribution box 10 of the present invention, which has been completed, should be fixed to the bottom surface 201 of the generation terminal box 200, which will be described in detail with reference to the accompanying drawings.

6 is a perspective view showing a hinged vertical fixing bracket 70 for vertically fixing the small light distribution box 10 in the bottom surface 201 of the generation terminal box 200.

     The small light distribution box side coupling portion 72 of the hinged vertical fixing bracket 70 forms a fastening hole 4a in correspondence with the coupling holes 4 formed on the left and right sides of the small light distribution box 10, such as screws. It is coupled with the small light distribution box 10 side using the fixing member 74, and the bottom coupling part 71 of the generation terminal box forms a fixing hole 75 to use the fixing piece bolt 75a. To the bottom terminal 201 of the generation terminal box (200).

In addition, the small light distribution box side coupling portion 72 and the generation terminal box bottom side coupling portion 71 is adhesively connected to each other by the spot welding to the hinge (73).

The small light distribution box side coupling portion 72 and the generation terminal box bottom side coupling portion 71 connected by the hinge 73 are fixed to each other by using the coupling screws 76 at the coupling holes 5 formed at both ends. .

The small optical distribution box 10 of the present invention has a vertical fixing structure and a rotating function on the bottom surface 201 of the generation terminal box 200 through the coupling and fixing structure of the hinge type vertical fixing bracket 70. Will be done.

7, 8, and 9 are vertically fixed at the bottom surface 201 of the generation terminal box 200 where the effective space of the small optical distribution box 10 is limited by using a hinged vertical fixing bracket 70. It is a perspective view of the state in which the small light distribution box 10 and the small light distribution box cover 12 is a perspective view and a side view of the rotating and open state.

As shown in FIGS. 7 and 8, various devices fixed to the bottom surface 201 of the generation terminal box 200, such as an image signal distributor 202 and an optical transmission / reception device (not shown) adjacent to the small optical distribution box 10. And the small light distribution box cover 12 cannot be opened due to the influence of the apparatus, and thus a connection between the optical patch cord (not shown) and the optical transmission / reception device is not easy.

However, the small light distribution box 10 according to the present invention can be applied to the above situation without any problem.

     Remove the coupling screw (76) fixed to the coupling hole (5) to primary separation of the small light distribution box side coupling portion 72 and the generation terminal box bottom side coupling portion 71, and the small light distribution box 10 again When the optical patch cord is inserted into the optical adapter 30 by vertically rotating the generation terminal box 200 from the bottom surface 201 and opening the rotated small optical distribution box cover 12, the operator connects with the optical transmission and reception device. It's easy to work with.

      In addition, the hinge-type vertical fixing bracket 70 can be efficiently fixed in any direction up, down, left, and right according to the working environment, and the small light distribution box cover 12 can be opened through vertical rotation. Done.

FIG. 10 is an exploded perspective view of the fitting-specific vertical fixing bracket 80, wherein the small light distribution box side coupling plate 81 of the fitting-specific vertical fixing bracket 80 is formed at the left and right sides of the small light distribution box 10; The fastening ball 85 is formed to correspond to the coupling ball 4, and is coupled to the small light distribution box 10 side by using a fixing member 85a such as a screw. To form a fitting groove 83 of a protruding shape.

In addition, the generation terminal box bottom side coupling plate 82 forms a fitting bent portion 84 double bent in the direction of the small light distribution side coupling plate 81.

In addition, a fixing hole 82a may be formed in the generation terminal box bottom side coupling plate 82, and the fixing bolt 82b may be fixed to the bottom surface 201 of the generation terminal box 200.

Then, the two fitting grooves 83 formed on the small light distribution box side coupling plate 81 and two fitting bent portions 84 formed on the bottom side coupling plate 82 of the generation terminal box are fitted to each other.

Further, the small light distribution box side coupling plate 81 and the generation terminal box side coupling plate 82 are fixed to each other by using coupling screws 82d formed at the coupling holes 82c formed at both ends.

As described above, the compact light distribution box 10 of the present invention has a vertical fixing structure and a detachable function on the bottom surface 201 of the generation terminal box 200 through the structure of the fitting-type vertical fixing bracket 80 as described above. do.

11 and 12 are a perspective view and a side view showing a state in which the small light distribution box 10 is vertically fixed to the bottom surface 201 of the generation terminal box 200 by using a vertical mounting bracket 80 fitted.

Fitting vertical fixing bracket 80 can be efficiently fixed in any direction up, down, left, right according to the working environment, and the small light distribution box cover 12 can be opened by attaching and detaching in the vertical direction. Will be done.

As shown in FIG. 11, a variety of devices and apparatuses fixed to the bottom surface 201 of the generation terminal box 200, such as an image signal distributor 202 and an optical transmission / reception device (not shown), which are adjacent to the small optical distribution box 10. Due to the influence, the small light distribution box cover 12 cannot be opened, and thus a connection between an optical patch cord (not shown) and an optical transmission / reception device is not easy.

However, the small light distribution box 10 according to the present invention can be applied to the above situation without any problem. After removing the coupling screw 82d fixed to the coupling hole 82c and separating the fitting groove 83 and the fitting bent portion 84, the optical patch is opened by opening the small optical distribution box cover 12. Inserting the cord into the optical adapter 30, the operator can easily connect between the optical transmission and reception device.

Subsequently, FIG. 13 and FIG. 14 show the small size light without using the hinge type vertical fixing bracket 70 and the customized vertical fixing bracket 80 where the space of the generation terminal box 200 and the bottom surface 201 is easy to use. A perspective view showing a state in which the distribution box 10 is fixed to the bottom surface 201 of the generation terminal box 200 using a piece bolt in a fixing hole 16 formed on the bottom of the small light distribution box in a single horizontal structure.

The operator uses the fixing piece bolt through the fixing hole 16 formed on the bottom surface of the small light distribution box 10 and the through hole 24 and the through groove 22 formed in the splice tray cover 20. By setting the direction according to the environment can be fixed in the small light distribution box 10 in any direction up, down, left, right.

In addition, in order to connect with the optical transmission and reception device (not shown) by removing the two coupling holes 25 formed at the upper left and right of the small optical distribution box cover 12 and the coupling screws 3 fixed to the coupling holes 25c. This is possible by opening the small light distribution box cover 12.

      In addition, even during the repair operation due to the fusion splicing point failure, it is possible to work without separating the small optical distribution box 10 from the bottom surface 201 of the generation terminal box 200 can shorten the recovery work time and improve the efficiency of the recovery work. have.

      First, in the state in which the small light distribution box cover 12 is opened, the PVC coating single coating pigtail 50 connected to the optical adapter 30 is separated.

      In addition, the splice tray cover 20 coupled with the spacer 19 formed on the bottom surface of the small light distribution box 10 can be removed by removing the coupling screw 1, thereby preventing an obstacle in the small light distribution box 10. The site can be identified and rapid failure recovery is possible without separating the small light distribution box 10 from the bottom surface 201 of the generation terminal box 200.

As described above, the design structure and the fixed structure of the small optical distribution box for the generation terminal box according to the present invention is a tight buffer cable (TFT buffer cable) PVC coated single-tailed pigtail that removes PVC sheath and buffer material, aramid yarn, which is not made of Tight Buffered Cable), and aramid yarn, which is a buffer material, has a short boot length, small outer diameter, and low self-elasticity. By connecting (Pig Tail, single-sided cord) by the fusion splicing method among the optical cable staring method, it is possible to easily configure the minimum radius of curvature of the optical cable inside the optical distribution box and at the same time reduce the optical distribution. .

In addition, the present invention according to the type of optical adapter and adapter plate as well as fusion splicing guaranteeing low connection loss, as well as the connector (SC) connection method such as SC, ST, MT-RJ or SC, ST, FC, VF-45 (SG It is effective to provide a variety of optical cable clustering methods such as general connector type such as Type), LC and special type polishing.

In particular, Korea is well formed infrastructure (Fusion Splicing) to ensure a low connection loss, the present invention has the effect of contributing to the activation of FTTH (Fiber To The Home) and super high-speed information communication grade.

      In addition, the present invention has the effect that it is possible to use the effective space of the terminal box by minimizing the occupied area of the generation terminal box can be fixed, detachable and vertical rotation and opening of the small optical distribution box cover vertically from the bottom of the generation terminal box.

Claims (16)

A main body having a small light distribution box cover on one side, a splice tray cover that is detachable to the main body and connected to an optical cable, and a plurality of continuous optical adapters can be mounted in a horizontal direction, and a small light distribution box can be detached from an inner central part. An adapter plate capable of being fixed so that the optical adapter can be disposed in a buried form, and mounted on the side of the main body to fix the main body in a vertical direction in the generation terminal box so that the optical adapter is also arranged in the vertical direction, but the main body is generated. Small optical distribution box used in the generation terminal box, characterized in that it comprises a vertical fixing bracket for detachably fixing to the bottom surface of the terminal box. The method of claim 1, The vertical fixing bracket is a small optical distribution box used for the generation terminal box, characterized in that the vertical rotation is fixed to the main body at the bottom surface of the generation terminal box. The method according to claim 1 or 2, The small light distribution box cover and the main body is coupled to the small light distribution box used for the generation terminal box, characterized in that it has an opening and closing means through a vertical rotation. The method according to claim 1 or 2, The small light distribution box cover and the main body is a small light distribution box used in the generation terminal box 200, characterized in that it is coupled to the structure detachable by a fixing member such as a screw having an opening and closing means. The method according to claim 1 or 2, Based on the splice tray cover, the lower space is formed with an optical cable inlet, an optical cable fixing groove, a sleeve holder for fixing a heat shrink sleeve for fusion splicing protection, and a cable management ring for grooming for an optical cable and a PVC coated single-tailed pigtail. On the upper surface, a plurality of continuous optical adapters can be mounted in the transverse direction, and a compact optical distribution box can be detachably fixed to the inner central part so that the adapter plates can be arranged in a buried form in a vertically stacked structure. Small optical distribution box used in the generation terminal characterized in that the. delete The method according to claim 1 or 2, The vertical fixing bracket includes a generation terminal box bottom side coupling part which is fixed to the bottom of the generation terminal box, and a small light distribution box coupling part that is pivotable based on a hinge mounted on one side of the generation terminal box bottom side coupling part. Small light distribution box used for generation terminal box. A main body having a small light distribution box cover on one side, a splice tray cover detachable to the main body, and a plurality of consecutive optical adapters can be mounted in the transverse direction, and are detachably fixed to the inner central portion of the small light distribution box. An adapter plate capable of arranging the adapter in a buried form, and mounted on the side of the main body to fix the main body vertically in the generation terminal box so that the optical adapter is also arranged in a vertical direction, but the main body on the bottom surface of the generation terminal box And a small optical distribution box including a hinged vertical fixing bracket for detachable and vertical rotation. The bottom surface of the splice tray cover is not a tight buffer type pigtail (Pig Tail, short cord) made of a tight buffer optical cable (Pig Tail, single cord), PVC sheath and the aramid yarn for the buffer material is removed, Boot (Boot) ) Forming a short-length, small outer diameter and low self-elasticity PVC coated single-tailed pigtail (Pig Tail) by fusion splicing, Method of installing a light distribution box using a small light distribution box (10) used for the generation terminal box characterized in that it comprises the step of fixing the main body to the wall using the hinge-type vertical fixing bracket. delete delete delete A main body having a small light distribution box cover on one side, a splice tray cover detachable to the main body, and a plurality of consecutive optical adapters can be mounted in the transverse direction, and are detachably fixed to the inner central portion of the small light distribution box. An adapter plate capable of arranging the adapter in a buried form, and mounted on the side of the main body to fix the main body vertically in the generation terminal box so that the optical adapter is also arranged in a vertical direction, but the main body on the bottom surface of the generation terminal box Providing a small optical distribution box including a fitting-specific vertical fixing bracket to allow detachment therefrom;  The bottom surface of the splice tray cover is not a tight buffer type pigtail (Pig Tail, single cord) made of a tight buffer optical cable (Pig Tail, single cord) PVC sheath and aramid yarn for the buffer material is removed, Boot Short-length, small-diameter, low-elasticity PVC coating single-tailed pigtail (Pig Tail, single-sided cord) by fusion splicing (Fusion Splicing), And a method of installing a light distribution box using a small light distribution box used for a generation terminal box, characterized in that it comprises the step of fixing the main body to a wall using the fitting-specific vertical fixing bracket. A main body having a small light distribution box cover on one side, a splice tray cover detachable to the main body, and a plurality of consecutive optical adapters can be mounted in the transverse direction, and are detachably fixed to the inner central portion of the small light distribution box. The main body is connected to the bottom of the generation terminal box by using an adapter plate for placing the adapter in a buried shape, a through hole and a light through hole formed in the splice tray cover, and a fixing bolt formed in the bottom of the small optical distribution box. Small light distribution used in the generation terminal box, characterized in that the detachable in a horizontal structure of a single type. The method of claim 13, The small light distribution box cover and the main body is coupled to the small light distribution box used for the generation terminal box, characterized in that it has an opening and closing means through a vertical rotation. The method of claim 13, The small light distribution box cover and the main body is a small light distribution box used in the generation terminal box, characterized in that it is coupled to the removable structure by a fixing member such as a screw having an opening and closing means. A main body having a small light distribution box cover on one side, a splice tray cover detachable to the main body, and a plurality of consecutive optical adapters can be mounted in the transverse direction, and are detachably fixed to the inner central portion of the small light distribution box. The main body is connected to the bottom of the generation terminal box by using an adapter plate for placing the adapter in a buried shape, a through hole and a light through hole formed in the splice tray cover, and a fixing bolt formed in the bottom of the small optical distribution box. The step of providing a small light distribution box detachable in a horizontal structure of a single type,  The bottom surface of the splice tray cover is not a tight buffer type pigtail (Pig Tail, single cord) made of a tight buffer optical cable (Pig Tail, single cord) PVC sheath and aramid yarn for the buffer material is removed, Boot Short-length, small-diameter, low-elasticity PVC coating single-tailed pigtail (Pig Tail, single-sided cord) by fusion splicing (Fusion Splicing),   Through-holes and optical through grooves formed in the splice tray cover, and a fixing bolt formed in the bottom of the small light distribution box using a piece bolt to allow the main body to be detachable in a single horizontal structure on the bottom surface of the generation terminal box. A method of installing an optical distribution box using a small optical distribution box used for a generation terminal box.

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