JP2006220978A - Outlet for optical fibers implemented on distribution board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outlet for optical fibers to be implemented on a distribution board which is composed in a compact manner so as to be installed inside a distribution board. <P>SOLUTION: The outlet for optical fibers to be implemented on a distribution board is composed of a box body 1, a fiber optic tray 2 which is housed in the box body 1, an inner cover 3 for covering the fiber optic tray 2, and a decorative cover 4 which is engaged to the inner cover 3 and covers the front of the box body 1. The box body is composed by superposing a second box body 1b on a first box body 1a, and the fiber optic tray 2 is disposed on each of the box bodies 1a and 1b. Openings 47 which communicate with the first box body 1a are provided on the backside of the second box body 1b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical outlet for mounting a distribution board, and more particularly to an optical outlet for mounting a distribution board that saves space for mounting in the distribution board.

  2. Description of the Related Art Conventionally, there has been proposed an optical fiber comprising four optical fiber cores that is branched into four optical fiber jacks, and the input side and the output side are arranged on one surface of the optical outlet.

This optical outlet consists of four fiber cores divided into one fiber core, each fiber core and the fiber core of the optical fiber jack connected, and four optical fiber jacks in parallel. There is (for example, Patent Document 1).
Japanese Patent Laid-Open No. 2004-354821

  The problem to be solved by the present invention is that in the case of the above-described optical outlet, if the input side and the output side are arranged on one surface of the outlet, the optical fiber and the four optical fiber jacks are juxtaposed. However, since the outlet itself becomes wider, it cannot be placed in a limited space such as a distribution board.

  The present invention solves the above problems and is compact so that the width of the optical outlet itself can be reduced and installed in the distribution board even when the input side and the output side are arranged on the same surface. It is an object of the present invention to provide an optical outlet for mounting a distribution board.

In order to solve the above problems, an optical outlet for mounting a distribution board according to the present invention is an optical outlet mounted on a distribution board, and has the following requirements.
(B) The distribution outlet mounting optical outlet includes a box body whose front surface is open, an optical fiber tray housed in the box body, an inner cover covering the fiber tray, and a box body engaged with the inner cover. (B) The box body is formed by superimposing the first box body and the second box body, and the optical fiber tray is disposed in each box body. (C) A receiving portion for holding a holding member for holding the indoor cable of the optical fiber is provided at the center of the bottom surface of the first box body, and openings for inserting the optical fiber plugs are provided on both sides of the receiving portion. Two openings for inserting optical fiber plugs are formed at a predetermined interval on the bottom surface of the second box body, and the first box book is formed on the back surface. Providing the opening communicating with

  Preferably, the optical fiber tray is provided with a winding portion for winding the extra length of the fiber core wire, and a plurality of the winding portions are juxtaposed in the vertical direction at a predetermined interval.

  Further, the winding part is constituted by a substantially circular inner wall and an outer wall arranged at a predetermined interval on the outer side of the inner wall, and a protruding piece for preventing the optical fiber core wire from jumping out is provided on the outer wall. Protruding toward the inner wall, forming at least the distance between the inner wall and the outer wall of the projecting piece, and providing a recess in the portion of the inner wall corresponding to the tip of the projecting piece An air gap is provided between the tip of the overhanging piece and the inner wall so that the optical fiber core can be easily wound around the winding portion and the wound optical fiber core does not jump out of the winding portion. do it.

  Then, the optical fiber core wire of the indoor cable drawn into the box main body from the outside and the optical fiber core wire connected to the optical fiber jack arranged inside the box main body are fused and connected to the optical fiber tray. At the same time, it is preferable to provide a holding portion for holding a reinforcing sleeve that protects the fused portion, and hold the optical fiber core wire and the reinforcing sleeve that are accommodated in a stable state.

  The holding portion of the reinforcing sleeve may be provided with two different bending structures whose holding width can be changed according to the thickness of the reinforcing sleeve so that the reinforcing sleeve can flexibly respond to the reinforcing sleeves having different thicknesses.

  Furthermore, it is preferable that the box main body is substantially the same size as the standardized wiring device plate, and the installation space is the same as that of the conventional wiring device plate.

  According to the first aspect of the present invention, the optical fiber trays are stacked in two stages, and the optical fiber jacks are arranged on the lower optical fiber tray and the upper optical fiber tray, respectively. Since it is possible to branch from the core fiber core wire to four optical fiber jacks, it can be easily installed in a place where the space such as the inside of the distribution board is limited.

  According to the invention of claim 2, since the winding portion for drawing the fiber core wire is juxtaposed in two places in the optical outlet, the degree of freedom for winding the fiber core wire is increased and the extra length can be easily adjusted. Therefore, it is possible to improve the efficiency of work at the time of installation.

  According to the invention of claim 3, the protruding piece formed on the outer wall suppresses the floating of the fiber core wire wound around the winding portion, and the fiber core wire does not come off from the winding portion, so that it is surely inside the optical outlet. An optical cable can be accommodated.

  According to the fourth aspect of the present invention, since the holding portion of the reinforcing sleeve that protects the connecting portion of the fiber core wire is provided, no load is applied to the fused portion, and trouble can be prevented.

  According to the fifth aspect of the present invention, it is possible to provide an optical outlet that can easily cope with a change in the thickness of the reinforcing sleeve depending on the number of fiber cores.

  According to the invention of claim 6, since the box body is set to be approximately the same size as the standardized wiring device plate, it can be easily installed in the distribution board.

  An optical outlet mounted on the distribution board, the box body having a front surface opening the optical outlet for mounting the distribution board, an optical fiber tray housed in the box body, and an inner cover covering the fiber tray; A decorative cover that engages with the inner cover and covers the front surface of the box body, and the box body is formed by superimposing a first box body and a second box body, Each of the optical fiber trays is disposed, and an accommodating portion for accommodating a holding member for holding an indoor cable of the optical fiber is provided in the center of the bottom surface of the first box body, and optical fiber plugs are provided on both sides of the accommodating portion. An opening for inserting the optical fiber plug is formed on the bottom surface of the second box body, and two openings for inserting the optical fiber plug are formed at predetermined intervals. The first box body and opening communicating provided, at the lower sides of the optical fiber tray provided with a fixing portion for fixing the optical fiber jack on.

  FIG. 1 shows a bottom perspective view of a distribution board mounting optical outlet A according to the present invention, and FIG. 2 shows an exploded perspective view of the distribution board mounting optical outlet A. FIG. The distribution board mounting optical outlet (hereinafter referred to as optical outlet) A is formed to be approximately the same size as the wiring appliance plate whose vertical and horizontal sizes are standardized, and can be installed in the distribution board. It is configured so as to be compact.

  In this optical outlet A, the indoor cable on the input side is branched and connected to four fiber jacks, and the extra length of the fiber core necessary to connect the indoor cable and the fiber jack can be accommodated. Yes, the indoor cable on the input side and all the optical fiber jacks on the output side can be arranged on one peripheral surface (bottom surface) of the optical outlet A.

  The optical outlet A is configured such that two fiber trays 2 are respectively arranged inside a box body 1 that is overlapped with the first box body 1a and the second box body 1b in the front-rear direction. A fiber tray 2 (hereinafter, this optical fiber tray is referred to as a first optical fiber tray 2a) is disposed, and a first inner cover 3a is covered from above, and a second box main body 1b is covered with the first box cover 1b from above. The fiber tray 2 (hereinafter referred to as the second optical fiber tray 2b) is disposed on the second box main body 1b, and the second inner cover 3b is covered from above. The decorative cover 4 is attached so that dust and the like do not enter inside.

  The first box main body 1a is formed with a screw hole 5 so that it can be fixed to a distribution board or a wall surface with a screw, an engaging convex portion 6 for fixing the optical fiber tray 2 at the center, and a lower portion described later. A gripping member 10 for gripping the indoor cable and a storage portion 7 for storing the packing 11 and insertion holes 8 for inserting the fiber plugs are formed on both sides of the storage portion 7 (see FIG. 3). The accommodating portion 7 is formed in a box shape, and through-holes 9 and 9 through which the indoor cables are passed are formed in the notch portion 7a on the front surface and the wall 7b on the rear surface, respectively.

  The gripping member 10 is a metal bent in a U-shape in side view, and U-shaped cuts 12 are formed on the front and rear sides so as to bite into the covered portion of the indoor cable so that the indoor cable does not slip, The packing 11 is formed of an elastic member such as rubber and has an insertion hole 13 through which the indoor cable is inserted in the front-rear direction. The packing 11 is disposed outside the gripping member 10 so as to prevent dust and the like from entering the box body 1 (see FIG. 2).

  As shown in FIG. 4, in the optical fiber tray 2 (2a, 2b), the engagement holes 15 formed on the bottom surface are engaged with the engagement protrusions 6 and 44 formed on the box bodies 1a and 1b, respectively. Thus, it can be attached to the box body 1.

  The optical fiber tray 2 includes a fixing portion 17 for fixing the optical fiber jack 16, a winding portion 20 for winding the fiber core wire 18, and a reinforcing member for fusion-bonding the fiber core wires 18 to each other and protecting the fusion portion. A holding portion 22 that holds the sleeve 21 is provided.

  The winding part 20 is composed of an inner wall 25 and an outer wall 26 arranged side by side at a predetermined interval. A protruding piece 27 projects from the upper end surface of the outer wall 26 toward the inner wall 25. 27 is formed to be approximately equal to the width (interval) L of the passage 30 formed by at least the inner wall 25 and the outer wall 26, and a guide protrusion 27a that is inclined downward toward the tip is formed on the front upper surface. The portion of the inner wall 25 corresponding to the tip of the overhanging piece 27 is bent inward to form a recess 28 and a gap is provided between the tip of the overhanging piece 27 and the inner wall 25 ( 5 (a)), the fiber core wire 18 can be easily accommodated in the passage 30 from the gap along the guide protrusion 27a, and the fiber core wire 18 once accommodated is blocked by the protruding piece 27. Jump out of the passage 30 unless intentionally removed It is made as to no.

  The inner wall 25 is formed in a substantially circular shape so that the radius is equal to or larger than the allowable minimum bending dimension R15 of the optical fiber core wire 18, and is arranged at a predetermined interval in the vertical direction in FIG. The inner wall 25a and the second inner wall portion 25b.

  The outer wall 26 includes a first outer wall portion 26a formed in an arc shape below the first inner wall 25a, a second outer wall portion 26b formed in an arc shape above the second inner wall portion 25b, and a first It comprises two substantially triangular third outer walls 26c formed between one inner wall 25a and second inner wall portion 25b.

  An overhanging piece 27 projects from the upper end surface of each outer wall portion toward the inner wall 25. As described above, the overhanging piece 27 is formed so as to substantially reach the outer peripheral surface of the inner wall 25, and the inner wall 25 corresponding to the overhanging piece 27 is bent inward to form a concave portion 28. The distance between the concave portion 28 and the tip of the overhanging piece 27 is set to be slightly larger than the thickness of the fiber core wire 18.

  A passage 29 through which the fiber core wire 18 of the indoor cable is passed is formed in the center of the first inner wall 25a in the vertical direction, and the fiber core wire 18 is bent sharply at both ends of the passage 29 when entering and exiting the passage 29. It is curved so that it does not spread outward.

  Further, a fixing portion 17 for fixing the optical fiber jack 16 is provided below the first inner wall 25a, and the fiber core wires 18 are fused and connected to the outside of the third outer wall 26c. A holding portion 22 that holds the reinforcing sleeve 21 to be protected is provided.

  The fixing portion 17 is provided with locking pieces 31 and 32 having hooks formed at the tips thereof, so that the optical fiber jack 16 can be locked from both sides and fixed onto the fiber tray 2. Further, the fixing portion 17 and the inner cover are provided with engaging grooves 38 that engage with convex portions 39 (see FIG. 12) formed on the upper and lower surfaces of the optical fiber jack 16, and the optical fiber plug is attached or detached when the optical fiber plug is attached or detached. The movement of the jack 16 is prevented.

  The holding portion 22 includes the outer wall surface 33 of the third outer wall 26c and the holding plate 34 described above. The holding plate 34 has engagement pieces 36 and 36 on both sides of an upper portion of a substantially L-shaped support plate 35 in side view. 3 is formed to be curved toward the wall surface 33 of the outer wall 26c, and the support plate 35 is formed so as to protrude in the center of the opening 37 formed in the tray. The bending of the support sleeve 35 and the bending of the support plate 35 in the direction of the arrow b can flexibly cope with the reinforcing sleeves 21 having different thicknesses (see FIG. 5B).

  As shown in FIG. 6A, the first inner cover 3a is formed in a plate shape so as to cover the lower half of the first box body 1a. An engagement hole 45 that engages with an engagement protrusion 46 (see FIG. 7B) formed on the bottom surface is formed, and can be fixed to the first box body 1a with a screw 52 through the hole 41. When fixed, the lower half of the first box body 1a can be closed (see FIG. 10D).

  A protruding portion 42 is formed at the front end so as to protrude downward and close the cutout portion 7a of the box body 1. The protruding portion 42 also has one end of the through hole 9 (FIG. 6B). )reference).

  As shown in FIG. 7 (b), the second box body 1b is formed with an engagement convex portion 46 that engages with the engagement hole 45 formed in the first inner cover 3a described above. Similar to the first box body 1a, the front surface has an engagement projection 44 that engages with the engagement hole 15 of the second fiber tray 2b and fixes the second fiber tray 2b to the second box body 1b. At the same time, a rectangular opening 47 is formed, and an elongated guide groove 48 is continuously provided at one end of the opening 47 downward (see FIG. 7A). The opening 47 and the guide groove 48 are for drawing out two of the fiber cores accommodated in the first fiber tray 2a into the second box body 1b together with the fiber jack. .

  Further, an insertion hole 8 into which a fiber plug is inserted is formed on the bottom surface corresponding to the opening 47.

  As shown in FIGS. 8A and 8B, the second inner cover 3 b is plate-shaped and is formed with a locking portion 40 projecting around the surface side. It can be fixed to the box body 1a (see FIG. 2), and the front surface of the second box body 1b can be closed at the time of fixing (see FIG. 11C). An overhang portion 42 is formed at the front end so as to protrude downward and close the notch portion 7a of the second box body 1b.

  The decorative cover 4 is formed with a hook 43 to be engaged with the engaging portion 40 of the second inner cover 3b on the back side (see FIG. 9B) and pressed from above in a state of being superimposed on the second inner cover 3b. As a result, the hook 43 is locked to the locking portion 40 of the second inner cover 3b and can be fixed to the second box body 1b via the second inner cover 3b.

  Next, the installation mode of the optical outlet A having the above-described configuration is changed to four optical fiber jacks with a four-core tape cable indoor cable 51 based on FIGS. 10 (a) to 10 (d) and FIGS. A case of branching to 16 (16a to 16d) will be described.

  First, the 1st box main body 1a is fixed to the switchboard with the screw 50 (refer Fig.10 (a)).

  Next, the first fiber tray 2a is fixed to the first box body 1a (see FIG. 10B).

  Subsequently, after the indoor cable 51 is inserted into the insertion hole 13 of the packing 11, the coating of the indoor cable 51 is peeled off, and the fiber core wire (four-core tape core wire) 18 is taken out. The core fiber cores 18a and 18b are divided into two cores, and one of the two fiber core wires 18a and the fiber core wires 19a and 19b extending from the optical fiber jacks 16a and 16b are fusion-bonded to further reinforce the fused portion. It arrange | positions in the approximate center of the sleeve 21a, the reinforcement sleeve 21a is heat-welded and fixed, and the connection part of fibers is protected. Similarly, the other two-core tape core wire 18b and the fiber core wires 19c and 19d coming out of the optical fiber jacks 16c and 16d are fusion-connected, and the fusion portion is arranged at the approximate center of the reinforcing sleeve 21b. The reinforcing sleeve 21b is fixed by thermal welding to protect the connection portion between the fibers (see FIG. 13). Fiber plugs 55a to 55d may be connected to the fiber jacks 16a to 16d, respectively.

  The extra lengths of the fiber ribbons 18a and 18b are wound around the winding part 20 of the first fiber tray 2a by an appropriate route, the reinforcing sleeves 21a and 21b are held by the holding part 22, and the optical fiber jacks 16a and 16b are fixed. It fixes to the part 17. (See FIG. 10 (c)).

  Thereafter, the first inner cover 3a is fixed to the first box body 1a with screws 52, and the substantially lower half of the first box body 1a is closed (see FIG. 10D). At this time, the optical fiber jacks 16c and 16d attached to the second optical fiber tray 2b are not blocked by the first inner cover 3a so as not to be accommodated in the first box main body 1a. Keep out from.

  Next, the second box body 1b is attached to the first box body 1a. This is because the engaging protrusion 46 formed on the back surface of the second box body 1b is engaged with the engaging hole 45 of the first inner cover 3a, and the second box body 1b is engaged with the first box body 1a. Secure to (first inner cover 3a). At that time, the optical fiber jacks 16c and 16d are left outside through the opening 47 (see FIG. 11A).

  After the second box body 1b is fixed to the first box body 1a (first inner cover 3a), the second fiber tray 2b is fixed to the second box body 1b, and the fiber core wires 19c and 19d are connected to each other. It pulls in into the 2nd fiber tray 2b from the notch part 37a provided in a row by the opening part 37 formed in the 2nd fiber tray 2b, and the optical fiber jacks 16c and 16d are used as the fixing | fixed part 17 (FIG.11 (b)). reference).

  Thereafter, the second inner cover 3b is passed through the second box main body 1b and the first inner cover 3a with a long screw 53 and fixed to the first box main body 1a by screwing. When the entire surface of 1b is closed (see FIG. 11 (c)) and the decorative cover 4 is applied from the front and pressed against the second inner cover 3b, the hook 43 is locked to the locking portion 40 of the second inner cover 3b. The decorative cover 4 can be fixed to the box body 1 via the second inner cover 3b (see FIG. 11D).

  The installed optical outlet A may be used by inserting a fiber plug 55 from below as shown in FIG.

  As described above, the optical fiber trays are stacked in two stages, and the optical fiber jacks are arranged on the lower optical fiber tray and the lower optical fiber tray, respectively, so that the optical fiber outlet is not expanded and the four optical fiber cores are expanded. Since the cable can be branched into four optical fiber jacks, it can be easily installed in a distribution board with limited space.

  The installation location of the optical outlet is not limited to the distribution board, and can be installed on the wall of the building by fixing the first box body to the wall with screws.

The bottom side perspective view of the optical outlet for distribution board mounting concerning the present invention The exploded perspective view explaining the composition of the above-mentioned distribution board mounting optical outlet Front view explaining the first box body Front view explaining the fiber tray (A) (b) is a perspective view of the holding | maintenance part holding the overhang | projection piece and reinforcement sleeve of a winding part (A) and (b) are the front view and bottom view of a 1st inner cover. (A) (b) is a front view of the second box body and a sectional view taken along line XX ′. (A) (b) is a front view of the second inner cover and an enlarged cross-sectional view taken along line YY ′. (A) and (b) are a front view of a decorative cover and an enlarged sectional view taken along the line ZZ '. (A)-(d) is a front view explaining the installation method of the optical outlet of this invention (A)-(d) is a front view explaining the installation method of the optical outlet of this invention Side view of fiber optic jack Connection diagram explaining connection between optical fiber and optical fiber jack

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box main body 1a 1st box main body 1b 1st box main body 2 Optical fiber tray 2a 1st optical fiber tray 2b 2nd optical fiber tray 3 Inner cover 3a 1st inner cover 3b 2nd inner cover 4 Makeup Cover 7 Accommodating portion 8 Opening portion 17 Fixed portion 20 Winding portion 25 Inner wall 26 Outer wall 27 Overhanging piece 28 Recessed portion 47 Opening portion A Optical outlet for mounting distribution board

Claims (6)

An optical outlet that is mounted on a distribution board and has the following requirements.
(B) The distribution outlet mounting optical outlet includes a box body whose front surface is open, an optical fiber tray housed in the box body, an inner cover covering the fiber tray, and a box body engaged with the inner cover. (B) The box body is formed by superimposing the first box body and the second box body, and the optical fiber tray is disposed in each box body. (C) A receiving portion for holding a holding member for holding the indoor cable of the optical fiber is provided at the center of the bottom surface of the first box body, and openings for inserting the optical fiber plugs are provided on both sides of the receiving portion. Two openings for inserting optical fiber plugs are formed at a predetermined interval on the bottom surface of the second box body, and the first box book is formed on the back surface. Providing the fixing portion for fixing the optical fiber jack to the by comprising opening communicating (d) the lower end sides of the optical fiber tray 2. The distribution board mounting light according to claim 1, wherein the optical fiber tray is provided with a winding portion for winding the extra length of the fiber core wire, and a plurality of the winding portions are juxtaposed in the vertical direction at a predetermined interval. Outlet. The winding portion is composed of a substantially circular inner wall and an outer wall arranged at a predetermined interval on the outer side of the inner wall, and a protruding piece for preventing the optical fiber core wire from protruding on the inner wall. The protruding piece is formed so that the length of the protruding piece is at least substantially equal to the distance between the inner wall and the outer wall, and a protruding portion is provided on the inner wall corresponding to the tip of the protruding piece. The optical outlet for mounting a distribution board according to claim 2, wherein a gap is provided between the tip of the piece and the inner wall. The optical fiber tray is fused and connected to the optical fiber core wire of the indoor cable drawn into the box body from the outside and the optical fiber core wire connected to the optical fiber jack arranged inside the box body, The distribution board mounting optical outlet according to claim 1, further comprising a holding portion that holds a reinforcing sleeve that protects the fused portion. The distribution socket mounting optical outlet according to claim 4, wherein the holding portion of the reinforcing sleeve has two different bending structures capable of changing the holding width in accordance with the thickness of the reinforcing sleeve. The distribution board mounting optical outlet according to claim 1, wherein the box body is substantially the same size as a standardized wiring device plate.

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