JPS6235082B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing device for optical fiber bar codes, optical fiber cables, etc. (hereinafter collectively referred to as optical fiber wires), and in particular, optical fiber wires are compared with conventional electrical cords and cables. Considering the fact that the cables are extremely thin, when wiring a large number of optical fiber lines, by fixing them all at once, it is possible to reduce the fixing space and improve the efficiency of the fixing work. This invention relates to an improved optical fiber fixing device.

In communication devices etc. that use optical fiber wires, it is necessary to appropriately fix the optical fiber wires on the device wall or on the board inside the device. By arranging a large number of optical fibers in a row horizontally between the bottom plate and the holding plate, and then connecting the bottom plate and the holding plate with screws, the optical fibers can be connected between the bottom plate and the holding plate. A fixing method was used that clamped and fixed the parts.
According to such conventional fixing methods, as the number of optical fiber wires is increased in order to arrange and fix the optical fiber wires in a horizontal row, the width dimension of the bottom plate and the presser plate must necessarily be increased. This results in an unnecessary expansion of the fixing space. In addition, when adjusting the position by moving the optical fiber wire in the direction of the line, use a tool to loosen the screws that fix the bottom plate and the presser plate, and then release the fixed state between the bottom plate and the presser plate. Since a method is adopted in which only the target optical fiber line is moved in the linear direction, there is a drawback that such position adjustment work itself is relatively complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an optical fiber that can be put to practical use by eliminating the inconveniences and disadvantages associated with conventional optical fiber fixing as described above, and that provides various advantages such as saving fixing space and increasing the efficiency of fixing work. The purpose of the present invention is to provide a wire fixing device.

According to the present invention, there is provided a bush for loading optical fiber wires into a plurality of alignment grooves provided on the outer periphery of the cylinder, a cylindrical fixing pawl that tightens and holds the optical fiber wire from the outer periphery of the bush, and A fixed casing is provided with a bush loaded with a wire and a space for accommodating the cylindrical fixing claw, and has openings for pulling out the optical fiber wire at the front and rear, and the fixed casing is inserted with a screw from one opening side of the fixed casing. Accordingly, there is provided an optical fiber wire fixing device that includes a lid body that applies a tightening force to the cylindrical fixing claw, and that fixes a plurality of optical fiber wires together in a ring shape, thereby reducing the waste of fixing space. In addition to preventing excessive expansion, the position of the optical fiber can be easily adjusted by loosening the lid relative to the housing. Hereinafter, the present invention will be explained in detail based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view of an optical fiber wire fixing device according to the present invention. In FIG. 1, the optical fiber wire fixing device according to the present invention includes a rigid housing 11 made of a hard resin material or a metal material, and the housing 1 as described above.
A bush 13 and a tightening claw 15 are housed inside 1.
and a lid 19 that is threadedly engaged with one open end of the housing 11. The housing 11 is formed as a cylindrical hollow body as shown in FIG. 1, and openings 21 and 23 are formed at both ends in the axial direction, and a step wall 25
is formed. Furthermore, a female thread 27 is formed on the inner wall surface on the opening 23 side. As described above, this casing 11 can be easily manufactured by mechanically turning a commercially available hard resin such as polycarbonate or aluminum material. The diameter of the internal space of the housing 11 is determined by the size of the bushing 1 described later.
3. Appropriately designed and processed according to the outer diameter dimension of the tightening claw 15. Furthermore, the stepped wall 25 is formed as a receiving wall for the bush 13, as is clear from the illustration in FIG. It may be formed on a wall surface perpendicular to the axial direction. The opening 21 also has a plurality of optical fiber lines 30 fixed thereto.
It has an inner diameter such that the plurality of fiber wires 30 loaded in the bush 13 can be pulled out without difficulty. On the other hand, the opening 23 forms an outlet on the other side of the optical fiber wire 30, and is also formed as an opening into which the lid 19 is screwed as described above. In addition, the lid body 19 includes a canopy portion 19a and a body portion 19.
The body portion 19b has a hollow cylindrical shape, and has a male thread 31 on the outer periphery of its tip that threadably engages with the thread 27 of the housing 11. This lid body 19 also has an axial outlet 33 for the optical fiber line 30.
Furthermore, the tip 35 of the body portion 19b has a tightening claw 15.
It is formed as a part that applies a tightening force to.
Like the housing 11, the lid 19 is also made of a rigid material such as a hard resin material or a metal material. Now, the bush 13 is the most characteristic component of the present invention, and is formed as a cylindrical element as a whole, as shown in the side view and longitudinal section of FIGS. 2 and 3. The bushing 13 may also be made from a hard resin material or a metal material by a mechanical cutting method, or may be made from a hard rubber material by a molding method. The bush 13 has a plurality of vertical grooves 37 formed on the outer periphery of its cylindrical main body 39, and in the illustrated example, six vertical grooves 37 are formed.
Two vertical grooves 37 are provided. These vertical grooves 3
Since the groove 7 is used as a loading groove for the optical fiber wire 30 (FIG. 1), it is preferable to form a round groove having a diameter that almost matches the diameter of the optical fiber wire 30. Further, the number of vertical grooves 37 is not limited to six as shown in the illustrated example, but may be increased or decreased as necessary. It is also desirable to prepare in advance various types of bushes 13 with different numbers of grooves. The shoulder portion 41 provided on the bush 13 is provided to fix the bush 13 in the axial direction by the stepped wall 25 of the casing 11 described above, and its shape is similar to that of the casing 1.
It goes without saying that the shape is not limited to the shape having an inclined surface as shown in the figure, as long as it can be pressed against the first stepped wall 25. Or button 15
The shoulder portion 41 may be completely omitted, and a receiving wall for receiving the side surface of the main body portion 39 may be appropriately provided on the housing 11 side.

4 and 5 are a side view and a longitudinal sectional view showing a specific example of the structure of the fixing claw 15. FIG. The fixing claw 15 is made of a relatively elastic synthetic rubber material or the like, and is generally formed as a cylindrical element. This fixing pawl 15 is an element that applies a tightening force from the outer periphery of the bush 13 when it is inserted into the bush 13 and pressed by the lid 19 after the optical fiber wire is loaded into the bush 13 described above. Therefore, a pawl 43 is provided on the inside of the fixed pawl 15 to match the pitch of the vertical groove 37 of the bush 13.
This applies a radially inward tightening force to the optical fiber wire loaded into the vertical groove 37 of the bush 13. The outer diameter of the fixing claw 15 is such that it lightly contacts the inner wall surface of the casing 11 when it is housed inside the casing 11, and when the lid 19 is screwed into the casing 11. Tip 35 of body 19b of lid 19
When pressed by the housing 11, the housing 11 is restrained by the inner wall surface of the housing 11, so that the housing 11 contracts inward.

According to the optical fiber wire fixing device of the present invention, which is comprised of the above-described elements, the optical fiber wires are aligned around the outer periphery of the cylindrical bushing and fixed together, making it possible to use the conventional bottom plate and presser plate. Compared to the fixing method, which has the disadvantage that the fixing space expands horizontally as the number of optical fibers increases, it is possible to gather them together on one circumferential surface, and each optical fiber This has the advantageous effect that by shortening and narrowing the gap between the cables, a relatively large number of optical fibers can be pulled together to form a single optical fiber cable. In addition, for example, when it is necessary to adjust the position of only one or several optical fiber wires among the plurality of optical fiber wires 30 loaded in the bush 13, the screw engagement between the lid body 19 and the housing 11 is necessary. If the parts are loosened, the clamping force applied by the fixing claws 15 from the outer periphery of the bush 13 will be loosened, so that the position of the target optical fiber can be easily adjusted. Although not shown in the figure, the plurality of optical fibers loaded in the bush 13 are surrounded by a well-known heat shrink tube,
By applying a tightening force from the outer periphery of the heat-shrinkable tube using the fixing claws 15, the risk of mechanical damage to each optical fiber wire can be completely eliminated when the optical fiber wires are fixed using a fixing device. It is also possible to prevent this. Further, although the bush 13 shown in FIGS. 2 and 3 is an embodiment in which the vertical groove 37 is formed only on the outer circumferential surface, for example, a through hole is provided in the center of the cylindrical main body 39 and the main body 39 is If a vertical slit is provided in advance in the through hole so that the diameter of the through hole can be slightly reduced by applying force from the outer periphery, the bush 1
The center hole of No. 3 can also be used as a loading hole for the optical fiber wire.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing one embodiment of the optical fiber wire fixing device according to the present invention, FIG.
The figure is a side view and a cross-sectional view showing the structure of a characteristic bush used in the same device, and FIGS. 4 and 5 are a side view and a cross-sectional view showing a specific example of a fixing claw that is also incorporated in the same device. 11... Housing, 13... Button, 15... Fixed claw, 19... Lid, 21, 23... Opening, 27
... Female thread, 30 ... Optical fiber wire, 31 ...
Male thread, 37... vertical groove.

Claims (1)

[Claims] 1. A bush for loading optical fiber wires into a plurality of alignment grooves provided on the outer periphery of the cylinder, a cylindrical fixing pawl that tightens and holds the optical fiber wire from the outer periphery of the bush, and the optical fiber wire is loaded. A fixed housing is provided with a housing space for the bush and the cylindrical fixing claw therein, and has openings for pulling out the optical fiber wire at the front and rear. An optical fiber wire fixing device that includes a lid body that applies a tightening force to a cylindrical fixing claw, and that fixes a plurality of optical fiber wires together in an annular shape.