JP4723598B2 - Optical connection box - Google Patents

Description

  The present invention relates to an optical connection box that can accommodate a connection portion in which optical fibers are connected to each other by connector, an extra length portion of the optical fiber, and the like.

  When connecting a plurality of optical adapters that can be connected to the connector portion provided at the tip of the optical fiber when connecting the optical fibers in the optical connection box, conventionally, the optical adapter is linearly connected. They were arranged side by side (for example, Patent Document 1). Then, with the column of the optical adapter as a center line, for example, a first extra length storage space for accommodating an extra length portion including a fused portion of one optical fiber is provided on the left side, while the other optical fiber is provided on the right side. The second surplus length storage space for storing the surplus length portion was provided.

JP 2002-243949 A

  However, in the above-described conventional configuration, since a plurality of optical adapters are arranged in a straight line, the size of the optical connection box becomes large for the number of adapters, and there is a space for installing the optical connection box. There were problems such as being limited, troublesome installation work, and high costs.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an optical connection box that can effectively use the space in the optical connection box and can reduce the size of the box body.

In order to achieve the above object, the invention according to claim 1 of the present invention includes a plurality of optical adapters for connector-connecting optical fibers to each other. And an extra length portion of the optical connection box, wherein the adapter holder for fixing the optical adapter is provided with a fixing portion that is fixed inside the optical connection box, and both side edges of the fixing portion are connected in the connector connecting direction. It is formed in a tapering taper shape, and a plurality of the adapter holders are arranged in an arc shape by arranging the side edges formed in the taper shape of the fixing portion close to each other with the side edges abutting or parallel to each other. as well as parallel to, by installing a sleeve holder for accommodating a fused portion of the optical fiber on the inside of the arc formed by the adapter holder column space inside the arc, one light A first extra length storage space for accommodating the extra length portion of the fiber is provided, and a fiber clamp member capable of fixing an optical fiber is installed outside the arc, and the outer space of the arc is used as the other light. you characterized in that the second slack storage space for accommodating the extra length portion of the fiber.

According to the present invention, since the adapter holders to which the optical adapters are fixed are arranged in a circular arc shape, compared with the conventional one in which the optical adapters (adapter holders) are arranged in a straight line, there are many in the same space. Optical adapters can be juxtaposed. Therefore, compared with optical connection boxes with the same number of optical adapters installed, it is possible to reduce the size of the optical connection box, making it easy to secure the installation space for the optical connection box and improving ease of use. Thus, it is possible to achieve effects such as cost reduction. Also, by arranging the adapter holders in an arc shape, the distance between the outer arcs becomes wider when the distance between the optical adapters inside the arc is the same as compared with the one arranged in a straight line. The connector can be easily attached and detached, and the workability can be improved. Furthermore, since both side edges of the fixing part of the adapter holder are tapered to taper in the connector connecting direction, the side edges formed in the tapered shape of the fixing part abut each other when installing a plurality of adapter holders. Alternatively, it can be naturally arranged in a circular arc shape by simply bringing them side by side in a state where the side edges are parallel to each other, which is very convenient.
Further, by installing a sleeve holder for accommodating the inner arcs formed by A Daputahoruda sequence fused portion of the optical fiber, the arc of the inner space, for accommodating the extra length portion of one optical fiber And a fiber clamp member capable of fixing the optical fiber on the outside of the arc, and a space for storing the extra length of the other optical fiber in the space outside the arc. 2 extra storage spaces. Therefore, the space inside the optical junction box can be used effectively, and further miniaturization can be achieved.

  Hereinafter, an optical junction box according to an embodiment of the present invention will be described with reference to the drawings.

1A and 1B are explanatory views showing the optical junction box 1, wherein FIG. 1A is a front view, FIG. 1B is a bottom view, and FIG. 1C is a right side view. FIG. 2 is an explanatory diagram showing the inside of the optical junction box 1, and FIG. 3 is a partially enlarged explanatory diagram of the inside of the optical junction box 1.
The optical connection box 1 is configured so that the optical fibers 6a and 8a can be connected to each other by a connector. The box-shaped box body 2 having an opening on the front surface and the box body 2 are hinged to the box body. 2 and a front door 3 for opening and closing the front opening of 2. Cable clamp members 7 and 7 for fixing the optical cables 6, 6... Drawn into the optical connection box 1 are installed below the box body 2. Further, cord clamp members 9, 9 for fixing optical fibers 8a, 8a,... Connected to the optical fiber 6a in the optical cable 6 are installed on the upper and lower sides of the box body 2 on the right side. Further, a plurality of adapter holders 21, 21. Reference numerals 10 and 11 denote connectors attached to the tips of the optical fibers 6a and 8a.

Here, the adapter holder 21, which is a main part of the present invention, will be described with reference to FIG. 4A and 4B are explanatory views showing the adapter holder 21, wherein FIG. 4A is a front view, FIG. 4B is a bottom view, and FIG. 4C is a right side view.
The adapter holder 21 is a metal plate-like member bent in an L-shape, and is an optical adapter 23 (which is connected to the connector 10, 11) and a fixing portion 22 fixed to the back surface of the box body 2. The optical adapter 23 is provided with an adapter mounting portion 24 to which the optical adapter 23 is fixed as shown in FIG. The adhering portion 22 is formed in a taper shape with both side edges narrowing toward the tip in the connector connecting direction (vertical direction), and the center angle θ between the both side edges is approximately 4.4 °. Further, round holes 25 and 25 through which a fixing screw (not shown) can be inserted are formed at the tip of the fixing portion 22. On the other hand, the adapter attachment portion 24 is formed in a rectangular shape that is long in the front-rear direction, and an attachment hole 26 for fixing the optical adapter 23 is formed at a substantially central portion thereof. , 11 can be installed in a connectable posture. Reference numeral 27 denotes a small hole for inserting a screw when the optical adapter 23 is fixed.

  The plurality of adapter holders 21 are installed in the box body 2 so that the side edges of the fixing portions 22 are parallel to the side edges of the adjacent fixing portions 22. As a result, the plurality of adapter holders 21, 21 .. are installed on the same circumference.

Further, in the space inside the arc formed by the adapter holders 21, 21..., The sleeve holders 12, 12 for housing the fusion splicing portion of the optical fiber 6 a and the drawn optical fibers 6 a, 6 a. A plurality of fiber clamp members 13, 13... For fixing the extra length portion are provided. That is, in the optical junction box 1, the space inside the arc is the first extra length storage space.
On the other hand, a plurality of fiber clamp members 13, 13... Are also installed in the space outside the arc formed by the adapter holders 21, 21..., So that the extra length of the optical fibers 8 a, 8 a. Yes. That is, the space outside the arc is set as the second extra length storage space.

Next, the connection of the optical fibers 6a and 8a in the optical junction box 1 as described above will be described.
First, the optical cables 6, 6... Are drawn into the box body 2 from below the optical connection box 1, and the optical cables 6, 6. A sufficiently long optical fiber 6 a is drawn from the optical cable 6 and connected to the optical fiber on the connector 10 side by fusion or the like, and then the connector 10 is connected to the optical adapter 23. The fused portion is accommodated in the sleeve holder 12, and the extra length portion is fixed by the fiber clamp members 13, 13,...
On the other hand, for the optical fibers 8 a, 8 a,. Then, after a sufficient surplus portion is pulled around the second surplus length storage space and fixed to the fiber clamp members 13, 13..., It is pulled out from the upper and lower portions of the box body 2.

According to the optical connection box 1 as described above, the adapter holders 21, 21... To which the optical adapter 23 is fixed are arranged in an arc shape inside the box body 2, so that the optical adapter (adapter holder) is straight. Can be installed in the same space as compared with the conventional one arranged in a shape, and a sufficient extra space storage space can be secured inside and outside the arc. it can. Therefore, compared with optical connection boxes in which the same number of optical adapters are installed, the size of the box body 2 can be reduced, the installation space for the optical connection box can be easily secured, and it is easy to use. Thus, it is possible to achieve effects such as cost reduction.
Further, by arranging the adapter holder 21 in an arc shape, the optical adapters 23, 23 on the outer side of the arc can be compared with each other when the distance between the optical adapters 23, 23 on the inner side of the arc is the same as that in the linear arrangement. Therefore, the work of attaching / detaching the connector 11 to / from the optical adapter 23 becomes extremely easy, and the workability can be improved.

Further, the fixing portion 22 of the adapter holder 21 is formed in a tapered shape whose both side edges narrow toward the tip in the connector connecting direction. Therefore, when the plurality of adapter holders 21, 21,. By simply fixing the side portions of the fixing portion 22 so as to be parallel to the side edge of the fixing portion 22 of the adjacent adapter holder 21, they can be naturally arranged in a circular arc shape, which is very convenient.
In addition, the sleeve holder 12 and the fiber clamp members 13, 13,... Are installed in the space inside the arc formed by arranging the adapter holders 21, 21,. In addition to the storage space, the fiber clamp members 13, 13,... Are also installed outside the arc, so that the space outside the arc is the second extra space. Therefore, the space inside the box body 2 can be used effectively, and the box body 2 can be further reduced in size.

  The configuration related to the optical junction box of the present invention is not limited to the mode described in the above embodiment, and the configuration related to the installation mode and shape of the adapter holder as well as the configuration of the box body, and various types. The configuration related to the installation position or the like of the clamp member can be changed as appropriate without departing from the spirit of the present invention.

For example, in the said embodiment, although the center angle between the both-sides edges in the adhering part of an adapter holder is 4.4 degrees, if it is the range of 2 degrees-7 degrees, it can utilize suitably. If it exceeds 7 °, there is a problem that adjacent connectors interfere with each other inside the arc, and if it is less than 2 °, there is a problem that there are few merits obtained compared to those arranged in a straight line. is there.
Moreover, there is no problem even if it is a block-shaped adapter holder instead of the adapter holder of the metal plate-shaped member bent in the L shape described in the above embodiment.
Furthermore, in the above embodiment, when the adapter holders are arranged, as shown in FIG. 2 and FIG. 3, etc., a slight gap is provided between the adapter holders (that is, they are installed close to each other). Of course, it is also possible to arrange so that the tapered portions are in contact with each other. Furthermore, the number of adapter holders arranged is not limited to the number shown in FIG.
In addition, the number and installation positions of the sleeve holders and the number and installation positions of the fiber clamp members in each extra length storage space are not limited to the form shown in FIG.

It is explanatory drawing which showed the optical junction box, (a) is a front view, (b) is a bottom view, (c) is a right view. It is explanatory drawing which showed the inside of the optical junction box. It is a partially expanded explanatory view of the inside of an optical junction box. It is explanatory drawing which showed the adapter holder, Comprising: (a) is a front view, (b) is a bottom view, (c) is a right view.

Explanation of symbols

  1 .... Optical connection box 2 .... Box body 3 .... Front door 6 .... Optical cable 6a, 8a .... Optical fiber 7 ... Cable clamp member 9 ... Cord clamp member 10,11 ... · Connector · 12 · · Sleeve holder 13 · · Fiber clamp member 21 · · Adapter holder 22 · · Fastening portion 23 · · Optical adapter 24 · · Adapter mounting portion 25 · · Round hole 26 · · · Mounting hole, 27 ... small hole.

Claims (1)

A plurality of optical adapters for connecting optical fibers to each other are built-in, and when connecting optical fibers, an optical connection box capable of storing the connecting portion and the extra length portion of the optical fiber,
The adapter holder for fixing the optical adapter is provided with a fixing portion that is fixed inside the optical connection box, and both side edges of the fixing portion are formed in a tapered shape that tapers in the connector connection direction,
A plurality of the adapter holders are arranged side by side in an arc by arranging the side edges formed in a tapered shape of the fixing portion in contact with each other or in a state where the side edges are parallel to each other , and
A sleeve holder for accommodating the fused portion of the optical fiber is installed inside the arc formed by the adapter holder row, and the space inside the arc is accommodated for the extra length portion of one optical fiber. A first extra length storage space is provided, and a fiber clamp member capable of fixing an optical fiber is installed outside the arc so that the outer space of the other optical fiber is stored in the outer space of the arc. An optical junction box characterized by being a second extra-length storage space .

Images