JPS5849907A - Fixing method for optical fiber connection part - Google Patents

Abstract

PURPOSE:To simplify the handling for fixing of a connection part, by using a magnetic material as one of a device body and the connection part between optical fibers and using a magnetized material as the other. CONSTITUTION:A reinforcing member 6 for a connection part 4 between optical fibers 2A and 2B is formed with a base plate 7 and a press cover 8 and consists of a magnetized material. Ends of coatings of optical fibers 2A and 2B are fitted from slits 9A and 9B up to grooves 11A and 11B, and end parts 3A and 3B of optical fibers are fitted into a groove 10 and are detained by the press cover 8, thus attaching the reinforcing member 6. A device body 12 consists of a box- shaped main body 13 and a cover body 14, and they are magnetic together. Thus, the connection part is fixed to a desired position of the device body to simplify the handling for fixing of the connection part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for fixing optical fiber connections.
For the mutual connection of B, the optical fiber [2] A, (21B end (31A) pulled out from the end of each cable sheath
, (31B are connected to each other in abutting state, and the connection part (4) formed by this is protected via a protective container (not shown) etc., but at the time of connection in this case, disassembly and reconnection, Extra length +51 to allow for reconnection due to work errors.
A, +51 B are set.

Generally, when making the above connection, the connection part (4
), extra lengths +51A, +51B must be organized and efficiently stored in a protective container, and for this reason, cylindrical, box-shaped, etc. instruments have been used in the past.

Among these, in the case of a cylindrical instrument, the inner space or the outer circumferential surface is used to hold the connection part and the extra length part in the desired state. For example, in an embodiment using the outer circumferential surface, the outer circumferential surface In the case of a box-shaped device, a large number of fitting parts are provided, and after the extra length is wrapped around the outer circumferential surface, the connecting part is fitted into the fitting part and held. The extra length is placed inside the box-shaped device, and the connecting portion is fitted into the fitting portion within the device.

By the way, when storing the connection part and the extra length as described above, it is best to make the winding diameter and loop diameter of the extra length as large as possible in order to suppress the loss due to bending. In order to eliminate tension, it is best to distribute the connection parts as much as possible, but since the length of the extra length does not vary depending on the connection type, when trying to obtain the desired winding diameter or loop diameter, Shortage or surplus will occur in the extra length, and
The connecting portions also cannot be arranged at predetermined distributed positions, and therefore the aforementioned conditions cannot be fully satisfied.

On the other hand, in connector connections, etc., if the connection between the connector plug at the end of the optical fiber and the connector housing that accommodates it is insufficient, connection loss will increase.
Therefore, there is a need for a simple connector connection means that does not cause such a situation. In view of the above-mentioned problems, the present invention improves the method of fixing the optical fiber connection part, and the specific method thereof will be described below. In the present invention, as explained in FIG.
2) The ends of B (3) A and (31B are connected by a connecting means such as discharge fusion) to create a connection part (4) and an extra length +5) A and +51 B, but the connection at this time Then, since the coated layer is removed from the outer periphery of the ends (31A, +31B), these ends (31A, +31
After the connection, the outer periphery of H is not only coated with an appropriate coating, but also a reinforcing member (6) as shown in FIGS.
4) The reinforcing member (6) illustrated in Figures 2 and 3 is a longitudinal plywood (force and pressure N (8)), and the upper surface of the plywood (7) is (9) A.

+91 B, a shallow V-shaped groove αq is formed in the center in the longitudinal direction, and deep V-shaped grooves Ql)A, QυB, etc. are formed on both sides of the shallow V-shaped groove αq, respectively.On the other hand, the pusher cover (8) has the above-mentioned six grooves a1. 0
υA, (The upper surface of 10B can be closed off.0 Furthermore, the above-mentioned reinforcing member (6) is made of a magnetic material, and its composition is, for example, 20 parts of PBTS, 10 parts of m-inch glass fiber, and 70 parts of ferrite. etc., and the reinforcing member (
After forming 6), it is magnetized in a magnetic field.

When attaching the reinforcing member (6) constructed in this way to the outer periphery of the optical fibers (2) A and (2) B, the coated ends of the optical fibers (2) A and (2) B are slit +9) A at both connected ends.

(9) Insert the grooves υA, (lυB and both ends t3) from B into the groove 01, and press both ends (31A, +31B in the same state) with the cover (8). , stays attached.

Note that the reinforcing member (6) may be a split cylinder having a square outer circumference and a circular inner circumference.

Next, the optical fiber made as above +1)A
, +11B connection part (4) and extra length part (51A, +
In the embodiment shown in Figs. 4 and 5, the case where the 51 B is set in various containers is shown. Both the U and the lid (141) are made of magnetic material (for example, metal such as steel). In this example, both optical fibers (21A, +2)
Extra length of B +5) A, +51B is stored in the main body in a loop state, and after adsorbing the connecting portions (4) to the inner surface of the main body in a dispersed arrangement, the main body (2) is A lid body 041 is placed on the top surface, and these two parts 03C141 are fixed to each other with a set screw (not shown) or the like.

Furthermore, a through hole for the optical cable end is provided on both sides of the container 07J in the above, but in this case, in order to obtain airtightness and waterproofness between the through hole and the outer periphery of the optical cable end, a rubber Grommets αSA and α9B are interposed therebetween, and although not shown, the upper and bottom parts of the container body Q3 are filled with a cushioning material such as a foam material.

In the embodiments shown in FIGS. 4 and 5 above, the allowable bending diameter of the optical fiber (for example, the optical fiber diameter 0
．． 9wx, allowable bending diameter 70-80mφ) 15
The diameter of the loop should be approximately twice as large as that of the vessel α4.
$-! and the connecting part (4) of the container (when housed in 1'a, these extra lengths +5) A, +51 B are restored by the rigidity of the optical fiber, and are in contact with the inner wall of the container body 0. It comes to exhibit a predetermined loop diameter, and on the other hand, the magnetized connecting portion (4) comes to maintain a predetermined position in an adsorbed state with the container body 02, which is a magnetic body.

Therefore, in the case of this embodiment, the extra length is +51 A.

(5) The loop diameter of B is the extra length f51 A, +5
1 B can be set in a proper state simply by housing it in the container α, and the connecting portion (4) is connected to the container α in order to stabilize it when the appropriate loop diameter is obtained. Even when a plurality of connecting parts (4) are fixed inside the container body Q3, these connecting parts (4) may
By dispersing and adsorbing them to arbitrary locations, concentration of connection parts and hypertension within the vessel tta can be avoided.

Furthermore, by moving and adjusting the connecting part (4) in the attracted state, the loop diameter of the extra length parts +51A, +51B can be adjusted. If pieces (not shown) are scattered and set aside, these extra length parts 151A, (51B) can also be suctioned and fixed into the container body α2, and can be attached via the suction pieces. The loop diameter adjustment similar to the above can also be performed.

Next, in the embodiment shown in Fig. 6, a cylindrical body O2 made of a nickel-plated cast iron pipe or the like is used to connect an optical fiber +2) A.
, (21B connection part (4) is fixed, and in the case of this embodiment, extra length part (5) A, L51
B f After wrapping around the outer periphery of the container body ++7J, the connecting portion (4) is adsorbed onto the outer peripheral surface of the container α2.

Furthermore, in this embodiment, the extra length +51 A, (51
Magnetized attraction pieces σf9A and Qf9B are also attached to the outer periphery of B, and a part of the extra length +5+ A, 151 B is attracted to the outer peripheral surface of the vessel body Q2 via these attraction pieces αfdA and 0f9B.

In this embodiment, the extra lengths are +51 A and +51 B.
The connection part (4) can be suctioned and fixed to the outer circumference of the vessel α2 with the winding diameter set to a predetermined diameter, and even if there are a large number of connection parts (4), they can be distributed over the outer circumference of the vessel body 0'IJ. In the embodiment shown in FIG. 7, the vessel body α is cylindrical as in the above embodiment, and there are many slits α7 on the outer periphery of the cylindrical vessel body (17J). a, Q
7) a..., α7) b, αib, aηb...
A flange (g) A% (g) B having ... is provided protrudingly,
On the other hand, nine adsorption pieces αfjA, QGB are attached to the desired positions of each of the extra lengths t51A, +51B as described above, and in this embodiment, the extra lengths t5JA, after the loop is formed. +51 B to the outer peripheral surface of the vessel body a7J, and each extra length +51 A, (a part of 51B is attached to the flange (g) A, and the slit aηa1 of Ql19B)
It is fitted into αib, and the connecting portion (4) and adsorption pieces (A) A and Qf9B are adsorbed to the outer peripheral surface of the vessel α.

According to the embodiment shown in FIG. 7, even if the container body 0 is cylindrical (or rectangular cylindrical), the extra length is +51 A.

With +51 B formed into a loop, the connection part (4) can be fixed to the outer circumferential surface of the vessel body (l side) by suction, and as above, the loop diameter of the extra length i51 A and (5) B can be set to the desired state. However, a plurality of connection parts (4) can be arranged in a distributed manner.

Next, an embodiment in which the aforementioned connecting portion (4) is of a connector type will be described with reference to FIG.

The connection part (4) in this embodiment includes a plurality of pairs (or one pair) of optical fiber ends (31A, +31B) and a pair of optical fibers attached to these ends f31A, +31B.
A pair of connector plugs QIAS (1'tB) and both these plugs (11A).

It consists of a connector housing (E) for removably fitting CIQB, and a connector plug CIIJA%QI.
Engagement protrusions @])A%QηB are formed on both sides of B, and the engagement protrusions QηA, @])H corresponding to the groove-shaped connector housing are formed on both sides of B. Matching recesses fiA and @B are formed.

In the embodiment shown in FIG. 8, each engagement protrusion υA1QυB
Insert a pair of connector plugs (IQA, (1'tB) into the connector housing (E) in a facing state so that the engagement recesses (A) A and @B are in a relative locking state. )
, each optical fiber end t31A, (3)B are optically connected in a simple and accurate state.

Of course, in this embodiment as well, the connector housing frame of the connection part (4) is made of a magnetic material like the reinforcing member fi+, and the connection part (4) constructed in this way is also shown in FIG.
As shown in FIG. 5, it is placed inside the box-shaped vessel α2 and fixed by suction, or as shown in FIGS. 6 and 7, it is suctioned and fixed on the outer peripheral surface of the cylindrical vessel 02.

In addition, in each of the embodiments described above, the connection part (4)
is made into a magnetic material and the container α is made into a magnetic material, but conversely, the connecting portion (4) may be made into a magnetic material and the container body az may be made into a magnetized material.

As mentioned above, in the present invention, in the method of connecting an optical fiber connection part to a container, one of the container body or the connection part is made of a magnetic material, and the other is made of a magnetized material,
Since the container body and the connecting portion are attracted to each other, the connecting portion with the extra length can be fixed to a desired position on the container body, and the L/fc can be fixed to the desired position of the extra length. Even if the length changes depending on the connection method, by fixing the above-mentioned connections according to the extra length, a fixed state with less increase in loss can be obtained, and a large number of connections can be made bulky. Since the fixing operation does not require the use of special jigs, handling when fixing the connection part is extremely simple.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a general optical fiber connection part, Fig. 2,
FIG. 3 is an exploded perspective view and a cross-sectional view showing one example of the optical fiber connection part in the present invention, FIGS. 4 and 5 are a plan view and a cross-sectional view showing an example of the method of the present invention in the order of steps, FIGS. 6 and 7 are perspective views showing other embodiments of the same method, and FIG. 8 is an exploded perspective view showing the other side of the optical fiber connection part in the same method. +21 A, (2) B...Optical fiber (3
) A, t3) B... End (4)...
・Connection part [51A, +51B...Extra length part (6)...
... Reinforcement member α2 ... Container body 03 ... Main body 041 ... Lid body QIA, (1'lB ... Connector plug (A)
・・・Connector Housing Patent Attorney Makoto Ito

Claims (8)

[Claims] (1) In a method of fixing an optical fiber connection to a container, either the container or the connection is made of a magnetic material, and the other is made of a magnetized material, and the container and the connection are attracted to each other. A method for fixing an optical fiber connection part, characterized in that: (2) A method for fixing an optical fiber connection part according to claim 1, wherein the container is made of a magnetic material and the connection part is made of a magnetized material. (3) A method for fixing an optical fiber connection portion according to claim 1 or 2, wherein the connection portion consists of a pair of optical fiber ends and a reinforcing member provided on the outer periphery of these ends. (4) Claims in which the connecting portion comprises a desired pair of optical fiber ends, a pair of connector plugs attached to each of these ends, and a connector housing for fitting and receiving these connector plugs. A method for fixing an optical fiber connection portion according to item 1 or 2. (5) A method for fixing an optical fiber connection part according to claim 1 or 2, in which the container body is box-shaped. (6) The method for fixing an optical fiber connection part according to claim 1, wherein the container body is cylindrical. (7) A method for fixing an optical fiber connection portion according to claim 3, wherein the reinforcing member is a magnetized two-piece structure. (8) A method for fixing an optical fiber connection portion according to claim 4, wherein the connector housing is a magnetized material.