JPH05142426A - Treating device for surplus length of optical fiber - Google Patents

Abstract

PURPOSE:To prevent the failure of fibers by surely holding the surplus length part 1a of an optical fiber by a simple operation. CONSTITUTION:First and second semicircular plates 5, 6 having grooves 5a, 6a of the radii of curvature larger than the permissible min. radius of curvature of the optical fiber 1 are mounted to a mounting plate 4 and the 2nd semicircular plate 7 is constituted stably along a guide hole 4a. After the surplus length part 1a is wound in the respective grooves 5a, 6a, the second semicircular plate 7 is opened and parted from the 1st semicircular plate 5, by which the slackness of the surplus length part 1a is removed.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The inventions of claims 1 and 2 are
For example, the present invention relates to an optical fiber extra length processing device for holding an extra length of an optical fiber connected to an optical transformer or the like.

[0002]

2. Description of the Related Art FIG. 10 shows, for example, "Special Article" (1989).
Published by Ohmsha in July, 2012) p. 25-p. It is a block diagram which shows the connection state of the conventional optical fiber shown by 31. In the figure, 1 is an optical fiber, 2 is a first connector to which one end of the optical fiber 1 is connected, and 3 is a second connector to which the other end of the optical fiber 1 is connected.

As such a conventional optical fiber 1, a fiber longer than the length actually required for connection is used because of its manufacturability and workability at the time of connection. Therefore, in the middle part of the optical fiber 1 connected to the connectors 2 and 3,
The extra length portion 1a as shown in the figure is generated.

[0004]

In the conventional optical fiber 1 as described above, the core wire is made of a glass-based material which is easily broken, and the extra length portion 1a causes rolling, so that each connector is swayed. There has been a problem that the radius of curvature of a portion such as a connection portion with 2 and 3 which is easily affected by vibration or external force becomes smaller than the allowable minimum bending radius, and the core wire may be damaged.

The inventions of claims 1 and 2 have been made to solve the above problems, and the extra length of the optical fiber can be held more reliably and easily. It is therefore an object of the present invention to provide an optical fiber surplus portion treating apparatus capable of preventing damage to a core wire.

[0006]

According to a first aspect of the present invention, there is provided an optical fiber surplus portion treating apparatus, each of which has a winding portion having a radius of curvature which is equal to or larger than an allowable minimum bending radius of the optical fiber, and the distance between them is adjusted. It is provided with the first and second extra length holding bodies that are enabled.

According to a second aspect of the present invention, there is provided an optical fiber surplus portion treating apparatus which has winding parts each having a radius of curvature which is equal to or larger than a permissible minimum bending radius of the optical fiber, and the distance between them can be adjusted. And a second extra length holder, and a spring for urging at least one of the first and second extra length holders in a direction in which the first and second extra length holders are separated from each other. It is equipped with.

[0008]

According to the invention of claim 1, the extra length portion is wound around each of the winding portions across the first and second extra length portion holding bodies, and the first and second extra length portions are provided in accordance with the length of the extra length portion. The extra length is held without sagging by adjusting the interval between the second extra length holders.

According to the second aspect of the invention, the first and second aspects are provided.
By wrapping the extra length part around each wrapping part between the extra length part holding bodies, and adjusting the interval between the first and second extra length part holding bodies according to the length of the extra length part, The extra length is held without slack, and the first and second extra length holding bodies are separated from each other by the spring force, so that the extra length is prevented from loosening more reliably.

[0010]

【Example】

Example 1. Embodiments of the inventions of claims 1 and 2 will be described below with reference to the drawings. 1 is a front view showing an apparatus for treating an extra length of an optical fiber according to a first embodiment of the invention of claim 1,
2 is a sectional view taken along the line II-II in FIG.

In the figure, 4 is a mounting plate having two oval (oval) guide holes 4a provided in parallel, and 5 is fixed to the mounting plate 4 by a fastener 6 such as a bolt 6a and a nut 6b. A semicircular first meniscus serving as a first surplus portion holder, and a semicircular first semicircular member 7 attached to a mounting plate 4 by a fastener 6. The second meniscus 7 is a second meniscus, and the second meniscus 7 can slide back and forth along the guide hole 4a.
The distance between and is adjustable.

Grooves 5a and 7a as winding parts are formed on the outer peripheral portions of the first and second meniscus plates 5 and 7, respectively, and the remaining portions of the optical fiber 1 are inserted into these grooves 5a and 7a. The long portion 1a is wrapped around. Therefore, the radii of curvature of the grooves 5a and 7a are each equal to or larger than the allowable minimum bending radius of the optical fiber 1.

Next, the operation will be described. First, FIG.
As shown in, the extra length portion 1a is wound around the first and second meniscus 5, 7 with the second meniscus 7 being closest to the first meniscus 5. After this, as shown in FIG.
The meniscus 7 of is separated from the first meniscus 5, and the extra length 1
Eliminate the slack in a. Then, the second meniscus 7 is fixed to the mounting plate 4 by the fastener 6 when the slack in the extra length portion 1a is eliminated.

By using such a surplus portion treating apparatus, the surplus portion 1a of the optical fiber 1 is firmly held so as not to vibrate by a simple method. Therefore, damage to the core wire of the optical fiber 1 is prevented.

Example 2. Next, FIG. 5 is a front view showing a surplus length portion processing apparatus according to a second embodiment of the invention of claim 1, and FIG. 6 is a sectional view taken along the line VI-VI of FIG. In the figure, 8 is an opening 8a extending in the axial direction (left and right direction in FIG. 5).
Is a mounting member provided on the side wall and having a C-shaped cross section.

Reference numeral 9 designates two sliding plates slidably provided inside the mounting member 8, and these sliding plates 9 include:
Two screw holes into which the bolts 6a are screwed are provided. Further, the first and second meniscus plates 5 and 7 similar to those of the first embodiment are fixed to the respective sliding plates 9 by bolts 6a. The first and second meniscus plates 5 and 7 are slidable along with the sliding plate 9 along the opening 8a.

In such a surplus portion treating apparatus, the bolt 6
By loosening a, the first and second menisci 5, 7 become slidable, and by tightening the bolt 6a,
The mounting member 8 is sandwiched between the first and second meniscus 5, 7 and the sliding plate 9, and the first and second meniscus 5, 7 are fixed. Therefore, as in the first embodiment, the extra length portion 1a of the optical fiber 1 can be firmly held by a simple method.

Example 3. In the first embodiment described above, the second meniscus 7 is attached to the mounting plate 4 by the tightening tool 6 including the bolt 6a and the nut 6b. For example, as shown in FIG. A spring 10 may be interposed between the springs. In this case, the mounting plate 4 and the second
The second meniscus 7 is slidably held by a frictional force (a force that can be moved by hand) between the second meniscus 7 and. By using such a spring 10, the work of loosening or tightening the fastener 6 is omitted, and the extra long portion 1a can be attached and detached only by sliding the second meniscus 7 by hand. The entire processing work of the long portion 1a is simplified.

Example 4. Although the first and second meniscus plates 5 and 7 are shown as the first and second extra length holders in the above Examples 1 to 3, the shapes of the first and second extra length holders are shown. However, the number, arrangement, etc. are not limited to this.
For example, as shown in FIG. 8, two disc-shaped first extra length holding bodies 11 are provided, and a disc-shaped second extra length holding body 12 is provided.
May be provided so as to move up and down along the guide hole 13a of the mounting plate 13. Further, each of the extra length holders 11 and 12 may be rotatable.

Example 5. Next, FIG. 9 is a front view showing a surplus length portion processing apparatus according to an embodiment of the present invention. In the figure, 14 are two springs provided between the first meniscus 5 and the second meniscus 7, and these springs 14 are
The first meniscus 5 and the second meniscus 7 are biased in a direction of separating from each other. Other parts are the same as in the first embodiment.

In such a surplus portion treating apparatus, since the spring 14 is provided between the first meniscus 5 and the second meniscus 7, it is not necessary to tighten the fastener 6, and The extra length portion 1a can be easily attached and detached simply by sliding the second meniscus 7 as it is. Also, the first meniscus 5 and the second meniscus 7
However, since they are always biased in the direction of separating from each other, the slack of the extra length portion 1a is more surely eliminated, and therefore, the core wire of the optical fiber 1 is also more reliably prevented from being damaged.

Although the spring 14 is arranged between the first meniscus 5 and the second meniscus 7 in the fifth embodiment, for example, a tension spring is provided to the left of the second meniscus 7 in FIG. May be provided.

[0023]

As described above, according to the optical fiber surplus portion treating apparatus of the first aspect of the present invention, the surplus portion is provided in each winding portion across the first and the second surplus portion holders. As it is wrapped around, the distance between the first and second extra length holding members is adjusted according to the length of the extra length, so by a simple operation,
The extra length portion can be held more reliably against vibrations such as an earthquake, and thus, the core wire of the optical fiber can be prevented from being damaged.

In addition, in the optical fiber extra length treatment device of the present invention, the first and second extra length holding members are separated from each other by the spring force. In addition to the effect of the invention, the extra length can be easily attached and detached,
In addition, it is possible to more reliably prevent the slack in the extra length portion, thereby more reliably preventing the core wire of the optical fiber from being damaged, and improving the reliability.

[Brief description of drawings]

FIG. 1 is a front view showing an optical fiber surplus portion processing apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a front view showing a state immediately after the extra length portion is wound around the device of FIG.

FIG. 4 is a front view showing a state in which slack in the extra length portion of FIG. 3 is removed.

FIG. 5 is a front view showing an optical fiber surplus portion treating apparatus according to a second embodiment of the present invention.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a cross-sectional view of essential parts of an optical fiber excess length treatment device according to a third embodiment of the present invention.

FIG. 8 is a front view showing an optical fiber surplus portion treating apparatus according to a fourth embodiment of the present invention.

FIG. 9 is a front view showing a device for treating an extra length of an optical fiber according to an embodiment of the present invention.

FIG. 10 is a configuration diagram showing an example of a conventional optical fiber connection state.

[Explanation of Codes] 1 optical fiber 1a extra length 5 first meniscus (first extra length holder) 7 second meniscus (second extra length holder) 11 first extra length Part holder 12 Second extra length part holder 14 Spring

Claims (2)

[Claims] 1. A first and a second extra length holding body each having a winding portion having a radius of curvature equal to or larger than a permissible minimum bending radius of an optical fiber and having an adjustable spacing therebetween,
The extra length portion of the optical fiber is wound around each of the winding portions across the first and second extra length holders, and the first and second extra length portions are provided according to the length of the extra length portion. 2. An apparatus for processing an extra length portion of an optical fiber, wherein the distance between the two extra length holders is adjusted. 2. A first and a second extra-length portion holding bodies each having a winding portion having a curvature radius which is equal to or larger than an allowable minimum bending radius of the optical fiber and the distance between them can be adjusted, and the first and second extra-length portion holding bodies.
And a spring for biasing at least one of the first and second extra length holding members in a direction in which the second extra length holding members are separated from each other. The extra length portion of the optical fiber is wound around each of the winding portions across the long length holders, and the first and second extra length holders of the first and second extra length portions are held in accordance with the length of the extra length portion. A device for processing an extra length of an optical fiber, characterized in that a space is adjusted.