JPH10206653A - Fixture for optical fiber cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent optical fiber from damaging and disconnecting. SOLUTION: A fixed metal tool 1 mainly consists of a TM fixing piece 2 and a guide piece 25, which has a guide fixing part 11 almost parallel to a fixed surface, and a guide part 12 inclined by given angle in relation to the guide part 11. The guide part 12 has a through hole 15, and a thin film 3 is stuck on an upper side 12a so as to cover the through hole 15. TM fixed piece 2 is cylindrical, and consists of a main part 20 and a screw part 22. When an optical fiber cable shown in guide is inserted almost parallel to the guide fixed part 11, optical fiber cannot break through the thin film 3, and is introduced on the upper side along the shape of the guide part 12. Tension member (TM) breaks through the thin film 3, penetrates the through hole 15, and is inserted into a through hole 21 which is formed almost orthogonally to the axis of the main body. TM is fixed by engaging a bolt shown in a figure in a screw hole 23 formed in the axial direction of TM fixed piece 2, and by performing pressure-welding at the below end of the bolt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture for fixing an optical fiber cable to a communication device or the like. Especially,
The present invention relates to a fixing bracket that facilitates separation of an optical fiber and a tension member when an optical fiber cable is connected to a communication device or the like.

[0002]

2. Description of the Related Art Conventionally, as a fixture for an optical fiber cable, for example, one having the configuration shown in FIG. 7 has been used. FIG. 7A shows a front view of a state in which the optical fiber cable 6 is fixed to the fixing bracket 300, and FIG.
Shows a right side view thereof. Optical fiber cable 6
Is a tension member for providing tensile strength
(Abbreviated as TM), which is constituted by a steel wire or the like, and supports the load of the cable by fixing the TM to a communication device. The TM8 is inserted into the insertion hole 301 of the fixing bracket 300 installed on the base 50, and the screw 4 is screwed into a screw groove 302 formed in the fixing bracket 300, so that the TM8 becomes the lower end 41 of the screw 4. And is pressed and fixed to the fixture 300.

[0003]

However, in the above-mentioned fixing operation, the optical fiber 7a is erroneously inserted into the insertion hole 3.
When the screw 4 is screwed in this state, the optical fiber 7a is pressed together with the TM8 at the lower end 41 of the screw 4 to cause damage or disconnection of the optical fiber 7a.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an optical fiber cable that can be easily separated from a TM when the optical fiber cable is connected to fix the TM only, thereby preventing damage or disconnection of the optical fiber. It is to realize metal fittings.

[0005]

According to the present invention, in order to solve the above-mentioned problems, the fixing bracket installed on the base is fixed to a predetermined direction with respect to the introduction direction of the optical fiber cable. It has a tapered guide part whose surface direction is oriented so as to form an angle, a hole is provided in the guide part, and the membrane can be broken at the tip of the core wire so as to cover this hole, A thin film having such a strength that the film is not broken is attached to the tip of the optical fiber. When the optical fiber cable is introduced into the guide portion, the tip of the optical fiber comes into contact with the guide portion before the core wire, but since the optical fiber is flexible and cannot break the thin film, the predetermined length is set along the guide portion. Introduced in the direction. On the other hand, since the core wire has higher rigidity than the optical fiber, it breaks the thin film and penetrates the hole. The core wire passing through the hole is fixed at the core wire fixing portion by screwing. Thus, when the optical fiber cable is introduced into the guide portion, the core wire and the optical fiber can be easily separated by the thin film, so that the optical fiber is not fixed together with the core wire, and problems such as damage and disconnection can be prevented. it can. Further, since the core wire and the optical fiber are automatically separated in this manner, the connection of the optical fiber cable becomes easy, and the efficiency of the connection work can be increased.

According to the second aspect of the present invention, the guide portion is formed with the direction regulating portion for regulating the direction of introduction of the optical fiber, so that the optical fiber can be brought into a desired shape when the optical fiber cable is introduced. It becomes possible to introduce in the direction, and the core wire and the optical fiber can be separated better.

According to the third aspect of the present invention, the optical fiber and the core wire can be easily separated by using paper, plastic, cloth, or metal as the material of the thin film.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on specific embodiments. FIGS. 1 (a), (b) and (c)
It is the top view, front view, and right side view which showed the structure of the fixing fixture 1 which concerns on the specific Example of this invention, respectively. or,
FIGS. 2A, 2B, and 2C are a plan view and a front cross-sectional view, respectively, showing a connection state of an optical fiber cable 6 with respect to a fixture 1 attached to a housing (base) 5. It is a figure and the AA direction view. As shown in FIG. 1, a fixing bracket 1 mainly includes a TM fixing piece 2 for fixing TM8.
And a guide piece 25 for separating the TM 8 from the optical fiber 7. The guide piece 25 includes a guide fixing portion 11 that is mounted substantially parallel to the mounting surface thereof,
A guide portion 12 is formed continuously at a predetermined angle ((90 + θ) deg, here θ = 35 deg) with respect to the guide fixing portion 11. The tip of the guide portion 12 is inclined downward, that is, toward the mounting surface of the housing 5, and has a function of guiding the introduced optical fiber 7 in a direction away from the housing 5. A through hole (hole) 15 is formed in the guide portion 12, and a thin film 3 made of paper is adhered to the upper surface 12 a of the guide portion 12 so as to cover the through hole 15. Further, the guide fixing portion 11 is formed with a hole 13 for inserting and arranging the TM fixing piece 2 and two mounting holes 14 used for assembling with the housing 5.

[0009] The TM fixing piece 2 has a main body 20 through which the TM8 penetrates and press-fitted and fixed to the TM8 by screwing with the screw 4.
And a screw portion 22 used for fixing to the guide piece 25, and both are integrally formed in a cylindrical shape. Main unit 20
The screw portion 22 is provided with a screw hole 23 in which a screw groove is formed on the inner peripheral surface in the axial direction.
Are screwed together. A male screw part 2 is provided on the outer peripheral surface of the screw part 22.
4 are formed, and the nut 9 is screwed into the male screw portion 24. A through hole 21 is provided in the main body 20 of the TM fixing piece 2 in a direction substantially orthogonal to the axial direction and facing the guide 12. The outer diameter of the screw portion 22 is smaller than the diameter of the hole 13, and the outer diameter of the main body portion 20 is larger than the diameter of the hole 13. By inserting the screw portion 22 into the hole 13 of the guide fixing portion 11 from the lower surface 11a side, the main body portion 20 comes into contact with the lower surface 11a of the guide fixing portion 11, so that the through hole 21 and the through hole 15 have substantially the same height. Is positioned. Then, by screwing the nut 9 into the male screw portion 24, the TM
The fixing piece 2 and the guide piece 25 are fixed.

The housing 5 is a housing of, for example, an outdoor optical transmitter or an optical receiver. The housing 5 is provided with a fixing portion 52 projecting from the bottom surface in a convex shape.
2, screw holes corresponding to the respective mounting holes 14 are formed. The fixing fitting 1 is fixed to the housing 5 by aligning the mounting hole 14 with the screw hole and screwing the screw 53 into the screw hole via the mounting hole 14. A hole 51 for inserting the optical fiber cable 6 into the housing 5 is provided on a side surface of the housing 5, and the guide portion 12 is positioned such that an upper surface 12 a thereof faces the hole 51. You. The through-hole 21 and the through-hole 15 are positioned at substantially the same height as the hole 51.

Next, a method of fixing the optical fiber cable 6 to the fixing fitting 1 fixed to the housing 5 as described above will be described with reference to FIG. First, as shown in FIG. 2A, the optical fiber cable 6 is inserted into the housing 5 from the outside of the housing 5 through the hole 51. The optical fiber cable 6 includes a plurality of optical fibers 7 and a single TM8.
The optical fiber 7 is formed longer than the TM8. When the optical fiber cable 6 is inserted through the hole 51, the tip of the optical fiber 7 comes into contact with the thin film 3 adhered to the guide 12. The optical fiber 7 has bending flexibility, and the thin film 3 has such a strength that it cannot be broken through at the tip of the optical fiber 7. Therefore, the optical fiber 7 slides on the guide portion 12 and moves upward (in the housing 5) along the tapered shape.
(In a direction away from the mounting surface).

The optical fiber cable 6 is inserted into the hole 5 as it is.
When inserted in 1, the TM8 contacts the thin film 3. TM8
Has sufficient rigidity to penetrate the thin film 3, penetrates the thin film 3 as shown in FIG. 2B, penetrates the through hole 15 of the guide portion 12, and penetrates the TM fixing piece 2. It is inserted into the hole 21 and penetrates the through hole 21. And T
As shown in FIG. 2 (c), M8 is pressed into contact with the lower end 41 of the screw 4 which has been screwed into the screw hole 23 and lowered, and the through hole 2
1 and the lower end 41 are clamped and fixed. Where TM
The fixing piece 2 and the screw 4 correspond to a core fixing part in claims. After fixing the TM 8 to the fixture 1 in this manner, the respective optical fibers 7 are connected in a predetermined manner.

When the optical fiber cable 6 is inserted through the hole 51 of the housing 5, the optical fiber 7 and the TM8 are separated from each other by the thin film 3, and the optical fiber 7 is guided. It can be introduced in a direction along part 12. Thereby, it is possible to prevent the optical fiber 7 from being erroneously inserted into the through hole 21 together with the TM 8 and to fix the same, so that the optical fiber 7 is not damaged or disconnected, and the product quality can be improved. Also, since only TM8 can be introduced in the direction in which the thin film 3 has been pierced, TM8 can be easily fixed, and efficient construction can be performed.

In the fixture 1 of the above embodiment, the guide 1
2 is continuously formed on the guide fixing portion 11, and the TM8 is fixed to the fixing fitting 1 by directly pressing the lower end 41 of the screw 4 to the TM8. However, the fixing method of the TM8 is not limited to this. . FIGS. 3A and 3B show a front view and a right side view, respectively, of a fixing bracket 100a for fixing the TM8 by using another fixing method. The fixing bracket 100a mainly includes a TM fixing piece 200a and a TM fastening piece 250a. The TM fastening piece 250a has a guide fixing portion 11 provided substantially parallel to the mounting surface, and the guide fixing portion 11 has a pair of holes 19 through which the screws 4 pass. The guide portion 12 is formed continuously on the side of the guide fixing portion 11 where the TM8 is introduced. Further, the TM fastening piece 250a is provided with a reinforcing portion 16a continuously facing the guide portion 12. When the TM fastening piece 250a is tightened with the screw 4, the reinforcing portion 16a
This is provided to prevent a from being deformed. The TM fastening piece 250a is screwed into the TM fixing piece 200a fixed to the housing 5 using two screws 4. This TM
The fixing piece 200a has a substantially rectangular parallelepiped shape, and screw holes 201a are formed at positions corresponding to the holes 19, respectively. The reinforcing portion 16a is formed with a through hole 17a which is opened in a substantially U-shape at a substantially center so that the TM8 can pass between the screws 4. When the optical fiber cable 6 is inserted into the fixture 10a from the guide portion 12 side, the optical fiber 7 is guided upward by the guide portion 12 without breaking the thin film 3. TM8 breaks the thin film 3 and penetrates the through hole 15,
It passes through the space between the TM fixing piece 200a and the guide fixing part 11, and penetrates the through hole 17a. Then, by tightening each screw 4, the TM8 is attached to the TM fastening piece 250a and the T
It is pinched and fixed with the M fixing piece 200a. Fixture 10
By setting Oa to the above-described configuration, TM8 can be easily and satisfactorily fixed, and the same effect as that of the fixture 1 shown in FIG. 1 can be obtained.

In the configuration shown in FIGS. 3A and 3B, TM8 is passed between the two screws 4 and screwed into the TM fixing piece 200a to pinch and contact the TM8. Although the configuration is adopted, the TM8 may be fixed using one screw 4. FIG. 3C shows a right side view of the fixture 100b having this configuration. In this fixture 100b, the through hole 17b is formed off the substantial center of the reinforcing portion 16b in order to prevent the TM8 from coming into contact with the screw 4. TM8
After passing through the through hole 15 and the through hole 17b,
By screwing into the screw hole 201b of the M fixing piece 200b, the TM8 is connected to the TM fixing piece 200b and the TM fastening piece 250b.
, And the same effect as the configuration of FIGS. 3A and 3B can be obtained. In the configuration shown in FIG. 3C, compared to the configurations shown in FIGS. 3A and 3B,
Since the number of screws 4 to be used can be reduced, a simpler configuration can be achieved.

In the configuration shown in each of the above-mentioned figures, members such as a TM fastening piece and a screw lower end located above the TM8 are moved to the TM8 side by screwing of the screw 4, and these members and the TM8 are moved. By holding TM8 between the fixing piece and
Although the M8 was fixed, the fastening piece 111 was moved from the lower side to the TM8 side by screwing of the screw 4 as shown in FIG. 4, and the TM8 was held between the fastening piece 111 and the guide fixing portion 11. It may be configured to be fixed. Here, FIG. 4A shows a front view of the fixing bracket 110, and FIG. 4B shows a right side view thereof. The screw 4 passes through a hole 19 provided in the guide fixing portion 11 of the TM fixing piece 112 and
Are screwed into the screw holes 114 provided in the holes. Tightening piece 1
Reference numeral 11 indicates that rotation of the screw 4 by screwing is restricted. For example, the fastening piece 111 has a rectangular shape, and its diagonal length is TM.
By being formed larger than the inner diameter of the fixing piece 112,
When the screw 4 is screwed, the tightening piece 111 comes into contact with the TM fixing piece 112, the rotation thereof is regulated, and the moving piece slides vertically.
With this mechanism, the TM8 is inserted into the through hole 15, passed through the space between the fastening piece 111 and the guide fixing part 11, and the fastening piece 111 is moved upward by tightening the screw 4, and the TM8 is guided by the guide. It is pressed against the fixing part 11 and fixed. Thus, TM8 can be fixed favorably, and the same effect as each of the fixing methods described above can be obtained.

In all of the above embodiments, the optical fiber 7 is
When the optical fiber 7 comes into contact with the guide portion 12, the optical fiber 7 is guided upward (in a direction away from the mounting surface of the housing 5) along the shape of the guide portion 12, but the guide portion 12 has a flat shape. Therefore, there is a possibility that a part of the optical fiber 7 is introduced in the left-right direction (the direction intersecting the up-down direction). Therefore, as shown in FIG. 5, the direction regulating portions 18a, 18b are formed on both sides of the upper surface 12a of the guide portion 12 by bending or the like.
May be provided so as to protrude substantially vertically, and the guide piece 251 may be configured. With such a configuration, introduction of the optical fiber 7 in contact with the thin film 3 and the guide portion 12 in the left-right direction is restricted, and the optical fiber 7 is moved in a desired direction (upward).
Satisfactorily can be introduced. Direction regulating part 18
The a and 18b may be formed by another method such as stamping or caulking in addition to bending, or may be formed separately from the guide portion 12. 5 (a), 5 (b) and 5 (c)
Shows a plan view, a front view, and a right side view of the fixing bracket 120, respectively.

In the above embodiment, the tip of the guide portion 12 is inclined downward (toward the housing 5) to introduce the optical fiber 7 upward, but the optical fiber 7 is introduced horizontally. It may be. FIG. 6 shows the configuration of the fixing bracket 130 at this time.
Is formed in a substantially trapezoidal shape, and a through hole 15
The guide portion 12 to which the thin film 3 is adhered is formed so as to cover at right angles. With such a configuration, when an optical fiber cable is introduced, the optical fiber comes into contact with the thin film 3 and slides on the guide portion 12 and is guided in the left-right direction along the tapered shape. On the other hand, TM breaks through the thin film 3 and
Since the optical fiber is guided into the through hole 21, the optical fiber and the TM can be easily separated. In this case, since the desired introduction direction of the optical fiber 7 is the left-right direction, the optical fiber and the TM can be separated more effectively by providing a direction regulating portion for regulating the optical fiber 7 in the vertical direction. In addition, FIG.
(B) and (c) have shown the top view, front view, and right side view of the fixture 130, respectively.

In the above embodiment, the material of the thin film 3 is paper, but plastic, cloth, metal, or a composite material thereof may be used. Examples of the plastic include a polyethylene film sheet, a polypropylene film sheet, and a vinyl chloride film sheet. As cloth, nylon,
Examples include synthetic fibers such as polyester, artificial fibers such as rayon, natural fibers such as cotton and silk, and glass fibers. And the form can be used for both woven and non-woven fabrics. As the metal, aluminum, copper, brass, stainless steel, and the like can be used, and the form thereof can be a foil, a net, or the like. In the above embodiment, the angle between the guide portion 12 and the guide fixing portion 11 is (90 + θ) deg, and the angle θ is 35 deg.
However, the value is not limited if it is larger than 0 deg and smaller than 90 deg. In the above embodiment, the thin film 3 is adhered to the upper surface 12a of the guide portion 12 so as to cover the through hole 15, but the thin film 3 is adhered to the lower surface of the guide portion 12 to cover the through hole 15.
May be covered. In this case, there is a possibility that the tip of the optical fiber 7 may enter the through hole 15, but since the optical fiber 7 has bending flexibility, the optical fiber 7 is introduced while rotating the optical fiber cable 6. Can be prevented from entering the through hole 15. Further, in the above-described embodiment, the configuration is such that the fixture is provided on the housing 5 used for the case of the outdoor type optical transmitter or optical receiver.
The fixture according to the present invention can be used for any device that connects and fixes the optical fiber cable 6.

As indicated above, according to the present invention,
A tapered guide portion is provided on the fixture of the optical fiber cable, and the film can be broken at the tip of the TM so as to cover the hole formed in the guide portion. By adhering the thin film having the optical fiber, the optical fiber and the TM can be easily separated at the time of introduction of the optical fiber cable, so that the work efficiency of the connection is improved, and the optical fiber is not fixed together with the TM, and the optical fiber is not fixed. Damage and disconnection can be prevented, and product quality can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic structural view showing a configuration of a fixing bracket according to a specific embodiment of the present invention.

FIG. 2 is a schematic structural view showing a state where a fixing bracket according to a specific embodiment of the present invention is assembled to a housing, and a TM is inserted and fixed to the fixing bracket.

FIG. 3 is a schematic structural view showing a configuration in which a TM is sandwiched and fixed between an upper surface of a TM fixing piece and a fixing bracket in a fixing bracket according to another specific embodiment of the present invention.

FIG. 4 is a schematic structural view showing a configuration in which a TM is sandwiched and fixed between a fixing portion and a support base in a fixing bracket according to another specific embodiment of the present invention.

FIG. 5 is a schematic structural view showing a configuration in which a guide portion is provided with a direction restricting portion in a fixing bracket according to another specific embodiment of the present invention.

FIG. 6 shows a configuration of a fixture according to another specific embodiment of the present invention, in which a guide portion is oriented so that an optical fiber is introduced in a direction substantially parallel to a mounting surface of the fixture. FIG.

FIG. 7 is a schematic structural view showing a configuration of a conventional fixing bracket.

[Explanation of symbols]

1, 100a, 100b, 110, 120, 130 Fixing bracket 2, 112, 200a, 200b T
M fixing piece 3 Thin film 4, 53 screw 5 Housing 6 Optical fiber cable 7 Optical fiber 8 T
M 11 Guide fixing part 12 Guide part 15, 21 Through hole 16a, 16b Reinforcement part 17a, 17b Through hole 25, 251, 252 Guide piece 250a, 250b T
M fastening piece

Claims (3)

[Claims] 1. A fixing bracket installed on a base for fixing an optical fiber cable composed of an optical fiber and a core wire, wherein a fixing surface of the fixing bracket is formed at a predetermined angle with respect to an introduction direction of the optical fiber cable. The direction is oriented, and a hole that allows the introduction of the core wire is formed, and the film can be broken at the tip of the core wire so as to cover the hole, but the film is not broken by the tip of the optical fiber. A fixing member for an optical fiber cable, comprising: a tapered guide portion to which a thin film having strength of 3 is adhered; and a core fixing portion for fixing the core passing through the hole by screwing. 2. The optical device according to claim 1, wherein at the time of introduction of the optical fiber cable, a direction regulating portion for regulating an introduction direction of the optical fiber to a desired direction is formed on the guide portion. Bracket for fiber cable. 3. The optical fiber cable fixing bracket according to claim 1, wherein the thin film is made of paper, plastic, cloth, or metal.