JP2000131533A - Optical fiber induction implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to well hold an optical fiber. SOLUTION: When the optical fiber F is passed between a pressing surface 16 and a guiding curved surface 24 and between elastic plates 32a to 32c and the shaft part 20 of a pressing body 14 after the optical fiber guiding implement 10 is fixed to a wall surface, etc., the detachment of the optical fiber F in the diametral direction of the induction curved surface 24 is blocked by the pressing surface 16 and the detachment in a direction orthogonal with the diametral direction of the induction curved surface 24 is blocked by cooperation of the elastic plates 32a to 32c and the shaft part 20 to the supporting surface 18 of the pressing body 14. When the pressing body 14 is advanced in a manner as to be pushed, the pressing surface 16 presses the optical fiber F to the guiding curved surface 24 so as to position the optical fiber F along the guiding curved surface 24. Even if the external force having been exerted on the pressing body 14 is released, the retreat is blocked by the meshing of the ratchet pawls 26 and 28 and a ratchet tooth 20c, the pressing body is kept at the pushed-in position and the optical fiber F is held in the state bent along the induction curved surface 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention belongs to the technical field of optical fiber guides.

[0002]

2. Description of the Related Art When an optical fiber is wired, an optical fiber guide is used to prevent breakage (breaking) at a bent portion thereof. An ordinary optical fiber guide has a curved curved surface such as an arc, and the optical fiber is bent along the curved curved surface to prevent breakage (bending) at the bent portion.

[0003]

The conventional optical fiber guide has room for improvement in the structure for securely holding the optical fiber along the guide curved surface.

[0004]

According to a first aspect of the present invention, there is provided an optical fiber guide having a main body having a guide surface along which an optical fiber extends, and a main body having a guide surface facing the guide surface. And a guide portion for guiding the pressing body along a normal direction of the guiding curved surface, and a guide portion for guiding the pressing surface closer to the guiding curved surface. Ratchet means are provided, which allow movement of the pressing body but prevent movement in the opposite direction.

The main body of the optical fiber guide is fixed to a wall or the like by a fixing means such as a screw or a double-sided adhesive tape. Keep the pusher away from the guide surface,
The optical fiber is bent by causing the optical fiber to follow the guiding curved surface.

[0006] The induction curved surface is a curved surface along a circle, an ellipse, a parabola, or the like. For example, in the case of a curved surface along an arc, by setting the central angle to 90 degrees (1/4 arc), 180 degrees (1/2 arc), 45 degrees (1/8 arc), etc. The bend angle of the bent part can be set.

Further, a plurality of optical fiber guides can be used in combination. For example, if the central angle is 90 degrees (1/4
By using two optical fiber guides having an arc-shaped guide curved surface and bending them at 180 degrees, or using four optical fiber guides to form a circular shape and winding the optical fiber, the optical fiber guide can be used as an extra length processing tool.

There is a risk that the optical fiber may be detached from the optical fiber guiding tool by merely aligning the optical fiber along the guiding curved surface. By reducing the distance of the curved surface, it is possible to prevent the optical fiber from detaching from the optical fiber guide and to follow the guiding curved surface. And since the ratchet means does not allow the pressing body to move in the direction of moving the pressing surface away from the guiding curved surface, the pressing surface does not separate from the guiding curved surface, and the optical fiber is reliably bent along the guiding curved surface. Will be retained.

In the optical fiber guiding device according to the second aspect, since the optical fiber guiding device according to the first aspect has a plurality of sets of the pressing body, the guiding portion, and the ratchet means, the optical fiber can be held more reliably. . The optical fiber guiding device according to claim 3 is the optical fiber guiding device according to claim 1 or 2, wherein the ratchet means is operated to allow movement of the pressing body in a direction to move the pressing surface away from the guiding curved surface. Since it is possible, the optical fiber can be held and removed at any time, for example, by removing the optical fiber once held.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
Is composed of a main body 12 having a quarter-arc shape and two pressing members 14. The pressing body 14 includes a pressing surface 16 which is a curved surface along an arc, a supporting surface 18 connected to the pressing surface 16, and a shaft portion 20 extending from the center of the supporting surface 18. Reference numeral 20 includes an inclined portion 20a and a latch portion 20b, and ratchet teeth 20c are provided in both edges of the latch portion 20b in a saw-tooth shape.

The pusher 14 has a shaft portion 20 penetrating a guide portion 22 provided on the main body 12 so as to be able to advance and retreat. The guide section 22 is provided on the substrate section 23 of the main body 12.
The substrate portion 23 is provided with two screw holes 25, and the main body 12 (that is, the optical fiber guide 10) is fixed to a wall surface or the like by screws (not shown) penetrating the screw holes 25. Can be. The back surface 2 of the substrate unit 23
Reference numeral 3a denotes a flat surface. For example, even if the back surface 23a is attached to a wall surface or the like with a double-sided adhesive tape (not shown),
2 (optical fiber guide 10) can be fixed to a wall surface or the like.

As shown in FIGS. 1 and 2, a guide surface 24 having a curved surface (curved surface corresponding to the side surface of a cylinder) is provided on the outer edge of the substrate portion 23. The aforementioned pressing surface 16
Faces the guide curved surface 24. Also, the substrate section 23
Have ratchet pawls 26 and 28 corresponding to ratchet means.
Are arranged in pairs adjacent to the guide portion 22. As shown in FIG. 2, the ratchet claws 26 and 28 are disposed inside the concave portion 29 of the substrate 23, and the base 26
A and 28a can be elastically displaced by swinging about the fulcrum.

The tips of the ratchet pawls 26 and 28 are
The ratchet teeth 20c are engaged with the ratchet teeth 20c, and the push body 14 is allowed to move forward (the push body 14 moves toward the guide portion 22), but is prevented from moving backward in the opposite direction. However, an external force is exerted in a direction in which the ratchet claws 26 and 28 are separated from each other,
If the tips of the ratchet claws 26 and 28 are separated from the ratchet teeth 20c (if the engagement is released), the pressing body 14 can be retracted.

The main body 12 is provided with a tip holder 30 located at a position where the latch portion 20b of the shaft portion 20 advances, and when the pusher 14 advances, the latch portion 20b
Is housed in the tip holder 30. further,
The body 12 has a 3 extending radially from the peripheral edge.
Elastic plates 32a, 32b, 32c are provided.

This optical fiber guide 10 is, for example, shown in FIG.
Used as shown. In the example of FIG. 3, two optical fiber guides 10 are fixed to a wall surface or the like. First, in a state where the distance between the pressing surface 16 and the guide curved surface 24 is appropriately secured, the optical fiber guide 10 is fixed to a wall surface or the like, and between the pressing surface 16 and the guide curved surface 24 and the elastic plates 32a to 32c.
The optical fiber F is passed between the shaft member 20 of the pressing body 14. The passed optical fiber F is prevented by the pressing surface 16 from separating from the guiding curved surface 24 in the radial direction, and the elastic curved plates 24a to 32c and the shaft portion 20 to the supporting surface 18 of the pressing body 14 cooperate to guide the guiding curved surface 24 In the direction perpendicular to the radial direction.

After the optical fiber F is passed between the pressing surface 16 and the guide curved surface 24, the pressing body 14 is pushed forward and advanced. Then, the pressing surface 16 moves the optical fiber F to the guiding curved surface 24.
Optical fiber F to guide curved surface 24.
Along. However, in the case of the present embodiment, the distance between the pressing surface 16 and the guide curved surface 24 when the pressing body 14 is at the maximum pressing position is larger than the diameter of the optical fiber F. It is not necessarily sandwiched between the curved surfaces 24. Also, when the pressing body 14 is at the maximum pressing position,
Since the inclined portion 20a of the shaft portion 20 enters the receiving portion 27 (see FIG. 2) formed between the guide curved surfaces 24, 24,
The inclined portion 20a does not hinder the push body 14 from moving forward.

When the external force exerted on the pressing body 14 is released, the pressing body 14 is prevented from retreating due to the engagement between the ratchet pawls 26 and 28 and the ratchet teeth 20c, stays at the pushed-in position, and stays at the pushed-in position. Is held in a state of being bent along the guide curved surface 24.

As described above, according to the optical fiber guide 10, the optical fiber F can be bent along the curvature of the guide curved surface 24 by aligning the optical fiber F with the guide curved surface 24. The pressing body 14 does not retreat from the state where the optical fiber F is held between the pressing surface 16 and the guide curved surface 24. For this reason, the pressing surface 16 and the guiding curved surface 24 regulate the radial position of the guiding curved surface 24 of the optical fiber F, and the elastic plate 32
a to 32c and the support surface 18 (or the shaft portion 20) of the pressing body 14
Thus, the position along the direction orthogonal to the radial direction of the guide curved surface 24 of the optical fiber F is regulated, so that the optical fiber F can be reliably prevented from falling off. Further, since the curvature of the optical fiber F does not become larger than the curvature of the guiding curved surface 24,
The breakage (break) of the optical fiber F can be reliably prevented.

If the optical fiber F is sandwiched between the pressing surface 16 and the guiding curved surface 24 when the pressing body 14 is at the maximum pushing position, the optical fiber F can be bent in close contact with the guiding curved surface 24. Can be. When a plurality of optical fiber guides 10 are used in combination, for example, the set of two optical fiber guides 10 shown in FIG. Processing can also be performed.

There are various methods of using the optical fiber guide 10 for the excess length processing of the optical fiber F, in addition to the above example. For example, as shown in FIG. Can also be used. In the example of FIG. 4, the optical fiber F is merely wound around two turns and １ ／, but if the pushing amount of the pushing body 14 is reduced (if the distance between the pushing surface 16 and the guide curved surface 24 is increased). The number of turns of the optical fiber F can be further increased.

The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to such embodiments, and it can be implemented in various ways without departing from the gist of the present invention. Needless to say.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the structure of an optical fiber guide according to an embodiment. FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, and FIG.
(C) is a side view.

FIG. 2 is a partially cutaway perspective view of the optical fiber guide of the embodiment.

FIG. 3 is an explanatory diagram of a usage example of the optical fiber guide of the embodiment.

FIG. 4 is an explanatory diagram of an example in which the optical fiber guide of the embodiment is arranged in a circle and used for extra length processing.

[Explanation of symbols]

10 optical fiber guide, 12 body, 14 push body, 1
6 ... pressing surface, 18 ... support surface, 20 ... shaft portion, 20a ... inclined portion, 20b ... latch portion, 20c ... ratchet teeth, 22 ...
Guide part, 23 ... substrate part, 24 ... guide curved surface, 26, 28 ...
Ratchet claw (ratchet means), 30 ... tip holder,
32a, 32b, 32c: elastic plate, F: optical fiber.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takayuki Kotani 2-24-15 Chiyoda, Naka-ku, Nagoya-shi, Aichi F-term in Kitagawa Industry Co., Ltd. 2H038 CA34

Claims (3)

[Claims] 1. A body having an induction curved surface along which an optical fiber extends, and a pressing body having a pressing surface arranged to face the guiding curved surface, wherein the main body is provided with the pressing body of the guiding curved surface. A guide portion for guiding along the normal direction, and ratchet means for permitting movement of the pressing body in a direction to bring the pressing surface closer to the guiding curved surface, but for preventing movement in the opposite direction. Characteristic optical fiber guide. 2. The optical fiber guide according to claim 1, wherein a plurality of sets of said pusher, guide, and ratchet means are provided. 3. The optical fiber guiding device according to claim 1, wherein the ratchet means is operable to allow the pressing body to move in a direction to move the pressing surface away from the guiding curved surface. Optical fiber guide.