JPS60194408A - Protecting device of optical cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical cable, and particularly to a device for preventing breakage of the end portion of the optical cable.

Generally, when optical cables are used to optically connect two devices, each device and the optical cable are often used in a fixed state.

For this reason, optical fibers in optical cables, especially glass fibers, may break if they are not handled properly. In other words, if a device, for example a programmable controller, is installed with little movement, it is possible to prevent breakage to a large extent by paying a sufficient amount of injection during installation, but if one or the other side of the device is frequently moved. In some cases, optical cables also need to be connected and disconnected frequently.

When the optical cable is connected to the device, as shown in FIG.
, 5 are respectively separable, and the optical fibers 2, 2
A plug 8.8 is attached to the tip of the.

Therefore, the part of the optical fibers 2, 2 covered with the outer jacket 6 is strong against impact, but the part where the outer jacket is peeled off, that is, the exposed part, has a soft coating covering the optical fibers 2, 2, so if this fiber is It may break if handled or if its bending radius specifications are not followed.

In order to prevent this breakage, it is conceivable to pull the optical cable close to the device and then peel off its jacket, but this has the disadvantage that it is extremely troublesome to handle when work space is limited.

Figure 2 shows the cubicle 2 installed on the duct 18.
The optical cable 1 is connected to the device 20 housed in the duct 18 and the inlet 19 is connected to the optical cable 1.
into the cubicle 23 through its plug 8,
8 into the receptacle 9.9, the connection work is done by inserting the optical cable 1 into the inlet 1.
If the bending radius of the optical fiber 2.2 with respect to the exposed portion 7 from the jacket 6 is ignored when passing through or pulling out from the optical fiber 9, or if strong straining is applied by the edge of the inlet 19, breakage will occur.

SUMMARY OF THE INVENTION An object of the present invention is to overcome these conventional drawbacks, and to provide a device that allows the exposed portion of an optical cable to be easily exposed with a simple structure and that is easy to handle.

In order to achieve the object, the present invention inserts an optical cable into a protection tube which has a longer dimension than the exposed portion of the optical fiber from the outer sheath, and also inserts an optical cable into the protection tube into which the peripheral wall thereof can be inserted. An operating rope is provided, one end of this lobe passes through the inside of the protection tube and is connected to one end of the tension wire, and the other end is led out of the protection tube, and the operation rope is pulled out from the protection tube. This covers the exposed portion of the optical cable and protects this portion.

An embodiment of the present invention will be described below with reference to the drawings.

That is, the optical cable 1 includes optical fibers 2, 2 and tension wires 5, 5 as described with reference to FIG.
is constructed by covering the optical fibers 2 with an outer sheath 6, and the exposed portion at the end of the optical cable 1 allows the optical fibers 2, 2 and the tension wire 5°5 to be separated by peeling off the outer sheath by a predetermined dimension. 7 is formed and plugs 8, 8 are attached to the ends of each fiber 2, while the protective tube 11 is made of hard or soft transparent or opaque material as shown in FIG. has a longer dimension than the exposed portion 70 of the optical fiber 2 from the outside wZ6, and has a sufficient inner diameter to allow the optical cable 1 to be freely inserted therethrough. A pair of holes 12.1 are provided at one end of this protection tube, penetrating the circumferential wall.
2 are provided, and a pair of holes 13, 13 are further provided so as to face these holes. The protection tube 11 has a first
An operating rope 15 is provided which passes through the peripheral wall of the hole 12.12, and this operating rope is formed into a loop by connecting both ends thereof, but it does not necessarily have to be a loop. good. Furthermore, as shown in FIG. 4, one end of this operating rope, that is, the portion extending toward the other end inside the protective tube 11, is connected to one end of the tension wire 5, and the other end is guided to the outside of the protective tube 11. The protective tube 11 also has a second hole 13.
A regulating rope 16 is provided which passes through the peripheral wall of the operating rope 13 by being inserted into the operating rope 15.
is also looped. And the regulation rope 1
6 is pulled together with the other end of the operating rope 15,
The drawing size of the operating rope 15 from the protective tube 11 is regulated. That is, as shown in FIG. 5, the protective tube 11 is positioned so that the exposed portion 7 of the optical fiber 2 lies across the optical cable 1 when the regulating rope 16 is pulled out to its maximum extent.

When laying the optical cable 1 in the above configuration, as shown in FIG.
Pull it to the side and insert the exposed portion 7 into the protective tube 11 as shown in FIG.
Cover and protect. In this state, as shown in FIG. 8, the optical cable 1 is pulled through the duct 18 or the inlet 19 to the vicinity of the device 20 to be connected. In this state, the protective tube 11 is pulled along the optical cable 1 as shown in FIG. When moved in the direction opposite to the exposed portion 7, the plugs 8,8
are exposed from the protective tube 11 together with the optical fibers 2,2. In this state, remove the fastener 17 and insert the plugs 8, 8 into the device 2.
0 receptacle. Furthermore, in this state, as shown in FIG. 7, the tension wire 5 can be hooked onto the wall of the cubicle 23 with a hook 21 or the like, and the optical cape/I/1 can be attached to the wall of the cubicle 23 with a saddle 22 or the like.

Conversely, the optical cable 1 is connected to the cubicle 23 or the device 2.
When removing from zero, the operating rope 15 is tied short near one end of the operating rope 15, that is, near the protective tube 11, so that the optical fibers 2, 2 can be removed without damaging them.

As described above, the present invention forms an exposed portion at the end of an optical cable consisting of an optical fiber and a tension wire by peeling off the outer sheath by a predetermined dimension so that the optical fiber and the tension wire can be separated. The optical fiber is inserted so as to be freely inserted into a protective tube having a longer dimension than the exposed portion of the optical fiber, and an operating rope that can be freely inserted through the peripheral wall of the protective tube is provided, and one end of this rope is connected to the protective tube. The tension wire is connected to one end of the tension wire through the inside of the cable, and the other end is led out of the protection tube, and with the operation rope pulled out from the protection tube, the exposed part of the optical cable is covered with this protection tube, and this part is This has the advantage of not damaging the optical fiber when attaching and detaching the optical cable.

[Brief explanation of drawings]

Figure 1 is a side sectional view showing the conventional optical cable connection method.
Fig. 2 is a perspective view of the connecting end of the optical cable, Fig. 3 is a perspective view of the protection tube in this invention, Fig. 4 is a perspective view showing the relationship between the optical cable and the protection tube, and Fig. 5 is the exposed portion of the optical fiber. Fig. 6 is a side sectional view showing the state in which the optical cable is connected, Fig. 7 is a side view showing the state in which the main optical cable is connected and installed to the device, and Fig. 8 is a side sectional view showing the state in which the main optical cable is connected and installed. FIG. 3 is a side sectional view showing an optical cable pulling-in operation. 1... Optical cable, 2... Optical fiber, 5...
Tension wire, 6... Outer cover, 7... Exposed part, 8... Plug, 11... Protection tube, 12... Hole,
13... Hole, 15... Operating rope, 16... Regulation rope, 17... Fastener, 18... Duct, 19...
...Inlet, 20...Device, 21...Key, 22.
...Saddle, 23...For cubicle patent Applicant Yamatakeno Newel Co., Ltd. Agent Patent attorney 1) Hiroshi Sawa, Akito, same Noboru Ishibashi, Yudo same, Ko Kato, Nobu-1111〒-1 Procedural amendment Calligraphy (spontaneous) 18o□59・dry, 15. B. Commissioner of the Japan Patent Office 1, Indication of the case, Japanese Patent Application No. 59-48065, 2, Title of the invention: Optical cable maintenance device 3, Person making the amendment 5, Subject of amendment (1) Scope of claims in the description (2) Column for detailed explanation of the invention in the specification (3) Column 6 for brief explanation of drawings in the specification, contents of amendment 6.1 Lines written on pages 1 to 2 of the specification and Lines 19-20, page 6, line 3, line 7
"Tension wire" on the 2nd line of the page, the 9th line and 18th to 19th lines of the 8th page, the 1st line and 7th line of the 9th page, and the 5th to 6th lines of the 10th page. ”
is corrected as "tension member". Claims (1) At the end of an optical cable consisting of an optical fiber and a tension member, by peeling off the jacket by a predetermined dimension, an exposed portion is formed that allows the optical fiber 7 and the tension member to be separated. ,
Further, the optical fiber is inserted so as to be freely inserted into a protective tube having a dimension longer than the dimension of the exposed portion, and an operating rope is provided in this protective tube so that it can be freely inserted through the peripheral wall of the protective tube, and one end of this rope is attached to the protective tube. The optical cable is connected to one end of the tension member through the inside of the protection tube, and the other end is led out of the protection tube, and the optical cable is exposed through the protection tube with the operating rope pulled out from the protection tube. Optical cable protection device that covers and protects this part. (2) The optical cable protection device i according to claim 1, wherein the operating rope is formed into a generally loop shape as a whole. (3) At the end of an optical cable consisting of an optical fiber and a tension member, by peeling off the outer sheath by a predetermined dimension, an exposed portion is formed that allows the optical fiber and the tension member to be separated, respectively;
Further, the optical cable is inserted so as to be freely inserted into a protective tube having a dimension longer than the dimension of the exposed portion, and an operating rope that can be freely inserted through the peripheral wall of the protective tube is provided, and one end of the rope is attached to the protective tube. The tension member is connected to one end of the tension member through the inside of the protection tube, and the other end is led out of the protection tube, and the operation rope is connected to the protection tube so that the pulling length of the operating rope is within a predetermined range. A protection device for an optical cable, wherein one end of a regulating rope is attached, and when the other end of the regulating rope and the other end of the operating rope are pulled, the length of the regulating rope is used to regulate the pull-out dimension of the operating rope.

Claims (3)

[Claims] (1) At the end of an optical cable consisting of an optical fiber and a tension wire, by peeling off the outer sheath by a predetermined dimension, an exposed portion is formed that allows the optical fiber and the tension wire to be separated, respectively;
Further, the optical fiber is inserted so as to be freely inserted into a protective tube having a dimension longer than the dimension of the exposed portion, and an operating rope is provided in this protective tube so that it can be freely inserted through the peripheral wall of the protective tube, and one end of this rope is attached to the protective tube. The tension wire is connected to one end of the tension wire through the inside of the protection tube, and the other end is led out of the protection tube, and the optical cable is removed by the protection tube with the operating rope pulled out from the protection tube. Optical cable protection device that covers and protects this part. (2) The optical cable protection device according to claim 1, wherein the operating rope is formed into a substantially loop shape as a whole. (3) At the end of an optical cable consisting of an optical fiber and a tension wire, peel off the outer sheath by a predetermined dimension to form an exposed portion that allows the optical fiber and tension wire to be separated, respectively;
Further, the optical cable is inserted so as to be freely inserted into a protective tube having a dimension longer than the dimension of the exposed portion, and an operating rope that can be freely inserted through the peripheral wall of the protective tube is provided, and one end of the rope is attached to the protective tube. The tension wire is connected to one end of the tension wire through the inside of the protection tube, and the other end is led out of the protection tube, and the length of the operating rope to be pulled out is regulated within a predetermined range from the protection tube. A protection device for an optical cable, wherein one end of a regulating rope is attached, and when the other end of the regulating rope and the other end of the operating rope are pulled, the length of the regulating rope is used to regulate the pull-out dimension of the operating rope.