JP2004354885A - Optical fiber storing case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber storing case facilitating the work for winding an excess length of the optical fiber. <P>SOLUTION: In the optical fiber storing case 1 which accommodates therein a holding part 30 for winding an optical fiber 21 around a case main body 2 of a box form and fixing the optical fiber, and a photoelectric conversion part 7 which is connected to the optical fiber 21 and converts an optical signal into an electric signal, the case main body 2 is provided with a holding tray 4 which is formed like a tray and forms the holding part 30, and the holding tray 4 accommodating the optical fiber 21 in the holding part 30 is made to be freely attachable/detachable to/from the case main body 2 on which the photoelectric conversion part 7 is fixedly installed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical fiber storage case for storing an extra length of an optical fiber and a photoelectric conversion unit, and more particularly to an optical fiber storage case in which a storage unit for an optical fiber and a storage unit for a photoelectric conversion unit are provided separately.
[0002]
[Prior art]
Conventionally, when an optical fiber used for communication or the like is pulled into a building from the outside, an optical fiber storage case that stores a photoelectric conversion unit that converts an optical signal into an electric signal and stores an extra length of the optical fiber has been provided. Provided on the outer wall of the building. In this case, the optical fiber storage case is provided with an optical fiber fixing portion near the optical fiber inlet. In the optical fiber, reinforcing wires are arranged on both sides, and these are covered with a covering portion to constitute an optical cable. The reinforcing wire is made of steel wire, reinforced plastic wire, or the like, and serves as a reinforcing material against bending of the optical cable. The covering portion is made of rubber or the like and protects the optical fiber from being directly exposed.
[0003]
In a conventional optical fiber storage case, for example, as shown in Patent Document 1, a photoelectric conversion unit and a part for storing an extra length of an optical fiber are integrally formed. The portion accommodating the extra length of the optical fiber is taken out by rotating to the outside of the case body, fixing the optical fiber and winding the extra length around it. After winding, rotate the storage part and put it back inside the case body.
[0004]
[Patent Document 1]
JP-A-63-33108 [0005]
[Problems to be solved by the invention]
However, in the conventional optical fiber storage case, the operation of fixing the optical fiber to the case main body and the operation of winding the extra length are performed at the position where the optical fiber storage case is installed. Since the installation position of the optical fiber storage case is set at a relatively high place, it is necessary to perform these operations at a high place, which is difficult. Even if these operations are performed on the optical fiber storage case in advance on the ground and then mounted on the outer wall of the building, the optical fiber storage case is relatively heavy, Fiber may be damaged.
[0006]
The present invention has been made to solve the above-described problem, and has as its object to provide an optical fiber storage case that can easily perform a work of winding an extra length of an optical fiber.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, an optical fiber storage case according to the present invention is provided with a housing for winding and fixing an optical fiber around a box-shaped case body, and a photoelectric conversion device connected to the optical fiber and converting an optical signal into an electric signal. In the optical fiber storage case that can accommodate the
The case main body is provided with a storage tray having a tray shape and forming the storage unit, and the storage tray containing the optical fiber in the storage unit is detachable from the case main body on which the photoelectric conversion unit is installed and fixed. It is configured as a feature.
[0008]
Further, in the optical fiber storage case according to the present invention, the case main body has a projection-shaped engaging claw and a claw-shaped fitting piece on an inner surface, and the storage tray has an engaging groove formed on a side surface. The positioning is performed by engaging with the engaging claws of the case body, and the side surface is fitted and fixed to the fitting piece of the case body.
[0009]
Further, the optical fiber storage case according to the present invention is characterized in that the engagement groove of the storage tray is formed on a side surface facing a side surface fitted with the fitting piece.
[0010]
Furthermore, the optical fiber storage case according to the present invention is characterized in that the storage section has a connector holding section for temporarily holding a connector provided at the end of the wound optical fiber. .
[0011]
In the optical fiber storage case according to the present invention, the photoelectric conversion section has an insertion port for connecting a connector, and the connector holding section is formed at a location in the storage section that is located more inward than the insertion port. It is characterized by doing.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of the optical fiber storage case 1 according to the present embodiment with the cover 3 opened, and FIG. 2 is an assembled perspective view of the optical fiber storage case 1 according to the present embodiment. FIG. 3 is a perspective view of the optical fiber storage case 1 according to the present embodiment in a state where the cover 3 is closed. In each of these drawings, an optical fiber storage case 1 according to the present embodiment is provided with a cover body 3 that covers an opening in a case body 2 formed in a box shape with an opening on one side so as to be openable and closable. The photoelectric conversion unit 7 and the storage tray 4 are housed inside.
[0013]
As shown in FIG. 4, the optical cable 20 has reinforcing wires 22, 22 made of a steel wire or a reinforced plastic wire disposed on both sides of an optical fiber 21, respectively, and these optical fibers 21 and the reinforcing wires 22, 22 are made of rubber or the like. The cable is covered with the covered wire 23 to form one cable. Since the optical fiber 21 is very thin and easily broken, the provision of the reinforcing wire 22 ensures the strength of the optical cable 20 against bending. Also, since the optical fiber 21 and the reinforcing wires 22, 22 are covered by the covered wire 23, they can be handled as one cable, and the optical fiber 21 can be protected from being exposed.
[0014]
The optical cable 20 is led into a building outdoors via a telephone pole or the like. In order to draw the optical cable 20 from outside into the building, the optical cable 20 is pulled from the utility pole to the vicinity of the building with a certain extra length, and the extra length is stored in the optical fiber storage case 1 provided on the outer wall surface of the building. . In the optical fiber storage case 1, the optical cable 20 is stored in a state of only the optical fiber 21 except for the covering wire 23 and the reinforcing wire 22.
[0015]
The tip of the optical fiber 21 is connected to another prepared optical fiber 29 having a connector 24 at one end. The connector 24 is inserted into the insertion port 7a of the photoelectric conversion unit 7 provided in the optical fiber storage case 1. The photoelectric conversion unit 7 converts an optical signal of the connected optical fiber 29 into an electric signal and outputs the electric signal to the output terminal 8, and is installed and fixed to the case body 2 in advance. A coaxial cable (not shown) is connected to the output terminal 8, and the coaxial cable is drawn inside the building, so that a signal from the optical cable 20 installed outdoors can be taken into the building.
[0016]
The case main body 2 of the optical fiber storage case 1 is hollow, except that a box-shaped photoelectric conversion unit 7 is housed therein as shown in FIG. On the lower surface 40 of the case body 2, approximately half of the inlet 6 for drawing in the optical cable 20 is provided in a projecting shape. The other half of the inlet 6 is provided in the cover 3, and the inlet 6 is formed by closing the cover 3 as shown in FIG. 3. An output terminal 8 from the photoelectric conversion unit 7 is provided on the lower surface 40 of the case body 2. Further, the lower surface 40 of the case main body 2 has an engaging portion 41 which is engaged with and fixed to the engaging piece 3a provided on the cover body 3. That is, the lower surface 40 of the case body 2 serves as a connection surface for the optical cable 20 and the coaxial cable, and also serves as a fixed surface when the cover 3 is closed.
[0017]
The cover body 3 of the optical fiber storage case 1 is openable and closable with respect to the case main body 2 via a hinge portion 9 provided on an upper side surface of the case main body 2. As described above, the cover body 3 is provided with approximately half of the inlet 6, and forms one inlet 6 together with approximately half of the inlet 6 of the case body 2. The engagement piece 3 a that engages with the engagement portion 41 of the case body 2 is formed to extend from the end of the cover body 3. The case body 2 and the cover body 3 are made of a resin material, and the engaging pieces 3a are formed in an extended shape. It can be firmly fixed.
[0018]
Here, in order to store the optical fibers 21, the storage tray 4 formed in a tray shape is provided separately from the optical fiber storage case 1, and the storage tray 4 is stored and fixed in the optical fiber storage case 1. The storage tray 4 includes an optical fiber fixing portion 5 for holding and fixing the pulled-in optical cable 20, a housing portion 30 for winding and fixing the optical fiber 21, a fixing portion 31 of a fiber joint for connecting the optical fibers 21, and A connector holding unit 32 for temporarily fixing a connector 24 for connecting the optical fiber 21 to the photoelectric conversion unit 7, and a fiber opening 33 for connecting the optical fiber 21 to the photoelectric conversion unit 7 are provided. It becomes.
[0019]
The case body 2 is provided with two engaging claws 42 formed in a protruding shape from the end to the inner side on the inner surface side of the lower surface 40. A fitting piece 43 that protrudes in the opening direction of the case body 2 and is formed in a claw shape is provided on the inner surface side of the surface facing the lower surface 40 of the case body 2. On the other hand, an engagement groove 34 is formed in the storage tray 4 at a position corresponding to the engagement claw 42 when attached to the case main body 2.
[0020]
According to the engagement claws 42 of the case body 2, the storage tray 4 can be positioned with respect to the case body 2. Further, according to the fitting piece 43 of the case main body 2, the storage tray 4 can be fixed to the case main body 2 so as not to fall. In order to attach the storage tray 4 to the case main body 2, first, the engaging groove 34 is engaged with the engaging claw 42 of the case main body 2, and the side surface is hooked and fixed to the fitting piece 43. Since the side surface of the storage tray 4 where the engagement groove 34 is formed is a surface facing the side surface fitted and fixed to the fitting piece 43 of the case main body 2, the storage tray 4 is easily attached to the case main body 2. be able to.
[0021]
The storage unit 30 is configured by a wall surface rising from the bottom surface of the storage tray 4 so that the shape in which two semicircles are connected to the storage tray 4 by an envelope in plan view is further divided into two. The optical fiber 21 is wound along this wall surface. Further, a plurality of protruding pieces 30a projecting toward the outside of the semicircle are formed at the upper end of the wall surface in the semicircular portion so that the optical fiber 21 wound around once does not come off. ing.
[0022]
The fixing part 31 of the fiber bonding part fixes a bonding part between the pulled-in optical fiber 21 and an optical fiber 29 provided with a connector 24 at one end prepared in advance. The joining of the optical fibers 21 is performed by welding the respective optical fibers 21. Alternatively, the end faces of the optical fibers 21 may be adjusted with high accuracy by using an optical fiber fixing member widely used. Further, the fixing portion 31 of the fiber bonding portion is arranged on a side surface on an envelope connecting the two semicircles of the housing portion 30.
[0023]
The connector holding section 32 is formed in a shape substantially conforming to the connector 24 so as to temporarily hold the connector 24 for connecting the optical fiber 29 to the photoelectric conversion section 7. In order to easily connect the connector 24 to the insertion port 7a of the photoelectric conversion unit 7 when the storage tray 4 is mounted on the case main body 2, the excess length of the optical fiber 29 is wound around the storage unit 30. In the above, the connector 24 needs to be at a position where the optical fiber 29 can be inserted into the insertion port 7a without excess or deficiency, and the connector holding portion 32 is provided on the wall surface of the housing portion 30 on the side of the fiber opening 33. Therefore, the connector holding portion 32 is formed so as to face the inside of the housing portion 30.
[0024]
The optical fiber fixing section 5 fixes the optical cable 20 inserted from the inlet 6 of the case body 2. The optical fiber fixing section 5 in the present embodiment is provided with a planar fixing base 10 on the bottom surface of the storage tray 4 near the lower surface 40 of the case body 2, and a cable holding section for fixing the optical cable 20 to the fixing base 10. 11, a folded fixing portion 12 and a covered wire holding portion 13, and two optical fiber fixing portions 5 are arranged. Therefore, the optical fiber storage case 1 in this embodiment can fix and store the two optical fibers 21.
[0025]
The optical cable 20 inserted from the inlet 6 is fixed in a straight line to the cable holding portion 11, and the coated wire 23 is branched into two portions at the point to expose the optical fiber 21. Here, the two covered wires 23 are branched so as to have the reinforcing wires 22 therein. The branched covered wire 23 is folded back by the folded fixing portion 12, and the covered wire 23 is further pressed and fixed from the side by the covered wire holding portion 13. In this manner, the optical fiber fixing section 5 fixes the optical cable 20 by branching and turning the coated wire 23 into two parts and fixing them.
[0026]
FIG. 5 is an enlarged plan view of the optical fiber fixing section 5. As shown in this figure, a cable holding portion 11 is arranged near the inlet 6 of the case main body 2, and is folded and fixed from the cable holding portion 11 to a position where the cable holding portion 11 is in series with the insertion direction of the optical cable 20. The part 12 is arranged. In addition, covered wire holding portions 13 are disposed on the left and right of the cable holding portion 11 as a center.
[0027]
Each of the folded covered wires 23 has a reinforcing wire 22 inside thereof, and thus generates a restoring force to return to the original position. Therefore, the covered wire holding unit 13 presses the covered wire 23 by a reaction force against the restoring force of the reinforcing wire 22. As a result, the covered wire 23 folded back by the folded fixing portion 12 is firmly fixed by the covered wire holding portion 13, so that even if a force is applied to the optical cable 20, the optical fiber fixing portion 5 firmly fixes the optical cable 20. You can keep.
[0028]
FIG. 6 shows a state where the optical cable 20 is fixed in the enlarged view of the optical fiber fixing section 5 of FIG. As shown in this figure, the optical cable 20 protruding from the cable holding portion 11 is branched into two, and the exposed optical fiber 21 extends into the optical fiber storage case 1 as it is. The covered wire 23 that has been branched into two is folded back by the folded fixing portion 12, further protrudes in the folding direction, and is pressed and held by the covered wire holding portion 13.
[0029]
The distal end of the covered wire 23 contacts the lower surface 40 of the case body 2. That is, the branched covered wire 23 is cut to a length in contact with the lower surface 40 of the case body 2. By setting the length of the insulated wire 23 in this way, the insulated wire 23 can be prevented from moving any further, and even if a force is applied to the optical cable 20, the optical fiber fixing section 5 further firmly fixes the optical cable 20. You can keep.
[0030]
FIG. 7 is a plan view showing a state where the optical fibers 21 are stored in the storage tray 4. When the outdoor optical cable 20 is drawn into the building, the optical fiber storage case 1 is attached to the outer wall of the building in advance. The optical cable 20 to be drawn in is prepared with a certain extra length, is fixed to the storage tray 4, and the optical fiber 21 from which the coating is removed is wound around the storage section 30 and stored. Further, the joint between the optical fiber 21 and the optical fiber 29 having the connector 24 at one end prepared in advance is fixed to the fixing portion 31 of the fiber joint. The optical fiber 29 provided with the connector 24 is also wound and housed in the housing part 30, and the connector 24 is temporarily fixed to the connector holding part 32.
[0031]
The work on these storage trays 4 does not need to be performed at a high place because the storage tray 4 is provided separately from the optical fiber storage case 1. Then, as shown in FIG. 7, the holding tray 4 holding and holding the optical fiber 21 is attached and fixed to the optical fiber housing case 1, and the connector 24 is connected to the insertion port 7 a of the photoelectric conversion unit 7. The storage tray 4 is lighter in weight than the optical fiber storage case 1 having the photoelectric conversion unit 7, and can be easily transported to a high place without damaging the optical fiber 21 and can be easily attached.
[0032]
【The invention's effect】
As described above, according to the optical fiber storage case according to the present invention, the storage section of the optical fiber is provided in the storage tray formed in a tray shape, and the storage tray is detachable from the case body. Accordingly, the operation of housing the optical fiber can be performed separately from the case main body, and there is no need to perform the operation of fixing and winding the optical fiber at a high place, so that these operations can be easily performed.
[0033]
Further, according to the optical fiber storage case according to the present invention, the case main body has the protruding engagement claws and the claw-shaped fitting pieces on the inner side surface, and the storage tray is formed with the engagement groove on the side surface. The receiving tray, which is separate from the case body, can be easily positioned and fixed to the case body by engaging and positioning the engaging claws of the case body and fitting the side surfaces with the fitting pieces. Can be.
[0034]
Further, according to the optical fiber storage case according to the present invention, the engagement groove of the storage tray is formed on the surface facing the side surface fitted with the fitting piece, so that it is positioned on one side and the other side. Therefore, the work of attaching the storage tray to the case main body can be easily performed.
[0035]
Furthermore, according to the optical fiber storage case according to the present invention, the housing section has the connector holding section for temporarily holding the connector provided at the end of the wound optical fiber, so that the The end of the optical fiber can be temporarily fixed between the time when the fixing and storing operation of the fiber is performed and the mounting tray is mounted on the case main body, and the optical fiber once wound does not come off the storing portion. You can do so.
[0036]
According to the optical fiber storage case according to the present invention, the connector holding portion is formed from the surface on the insertion port side of the storage portion toward the inside, so that when the storage tray is attached to the case main body, the connector is connected. It can be easily changed to the outlet.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state where a cover body of an optical fiber storage case according to an embodiment is opened.
FIG. 2 is an assembled perspective view of the optical fiber storage case according to the embodiment.
FIG. 3 is a perspective view of an optical fiber storage case according to the embodiment.
FIG. 4 is a perspective view of an optical fiber according to the embodiment.
FIG. 5 is an enlarged plan view of an optical fiber fixing portion of the optical fiber storage case according to the embodiment.
FIG. 6 is a diagram showing a state where the optical cable is fixed in FIG. 5;
FIG. 7 is a plan view showing a state where optical fibers are stored in a storage tray of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Optical fiber storage case 2 Case main body 3 Cover body 4 Storage tray 5 Optical fiber fixing part 6 Inlet 7 Photoelectric conversion part 10 Fixing base 11 Cable holding part 12 Folding fixing part 13 Covered wire holding part 20 Optical cable 21 Optical fiber 22 Reinforcing wire 23 Coated wire 24 Connector 30 Housing 34 Engagement groove 40 Lower surface 42 Engagement claw 43 Fitting piece

Claims (5)

In an optical fiber storage case containing a housing portion for winding and fixing an optical fiber around a case body having a box shape and a photoelectric conversion portion connected to the optical fiber and converting an optical signal into an electric signal,
The case main body is provided with a storage tray having a tray shape and forming the storage unit, and the storage tray containing the optical fiber in the storage unit is detachable from the case main body on which the photoelectric conversion unit is installed and fixed. An optical fiber storage case, characterized in that: The case body has a projection-shaped engaging claw and a claw-shaped fitting piece on the inner surface, and the storage tray has an engaging groove formed on the side surface and is engaged with the engaging claw of the case body for positioning. The optical fiber storage case according to claim 1, wherein the side surface is fitted and fixed to a fitting piece of the case main body. The optical fiber storage case according to claim 2, wherein the engagement groove of the storage tray is formed on a side surface facing a side surface fitted with the fitting piece. The optical fiber housing according to any one of claims 1 to 3, wherein the housing portion has a connector holding portion for temporarily holding a connector provided at a tip of the wound optical fiber. Case. 5. The light according to claim 4, wherein the photoelectric conversion portion has an insertion port for connecting a connector, and the connector holding portion is formed at a location of the housing portion that is located more inward than the insertion port. Fiber storage case.

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