JPS60138505A - Optical cable connection box - Google Patents

Abstract

PURPOSE:To install an excessive-length storage case taken out of an box body stably at small space with a small movement extent by constituting the excessive-length storage case so that it can be stood on a stand provided to the box body. CONSTITUTION:If an optical fiber needs at the inner side to be reconnected or switched in the middle of or after the connection operation of a multicore optical cable, the excessive-length storage case at the front side is drawn out of a guide rod 25 and its insertion piece 23 is inserted into the groove of the stand 33 to stand the excessive-length storage case 13 on the stand 33. This operation is repeated to put the desired excessive-length storage case on the front, and necessary operation is carried out. Thus, the excessive-length storage case taken out of the box body is installed temporarily and stably at small space with a small movement extent.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an optical cable connection surface, and particularly relates to an improvement in a type of connection surface in which a plurality of optical fiber connection length storage cases are stacked in a case. be.

[Prior art]

Generally, when connecting multi-core optical cables with multiple built-in optical fibers, the optical cables are introduced into a box, separated into individual fibers, and then the optical fibers are connected, and the remaining connection length is I try to store it in a storage case. A number of extra length storage cases are prepared according to the number of optical fibers, and the extra length storage cases are arranged one on top of the other in the case. If the extra length storage cases are arranged in a single position in this way, when reconnecting or switching the optical fiber connection section stored in the extra length storage case at the back, for example, the front side should be It is necessary to take out the extra length storage case from the box. The extra length storage case taken out from the box is usually stacked close to the box, but the amount of movement of the extra length storage case is too large, causing unnecessary tension to be applied to the optical fiber, or the extra length storage case If the installation condition of the optical fiber is unstable, the overlapping fiber may collapse and damage the optical fiber. Depending on where the connection surface is installed, it may be difficult to find a place to temporarily install the extra length storage case.

[Purpose of the invention]

In view of the above-mentioned problems, an object of the present invention is to provide an optical cable connection that allows stable temporary installation of the extra length storage case taken out from the box with a small amount of movement and without taking up a large installation space. The aim is to provide a face.

[Structure of the invention]

In order to achieve the above object, the present invention forms an insertion piece in each of the extra length storage cases on the optical cable connection surface where a plurality of extra length storage cases for optical fibers are stacked in a box, and A stand having a groove formed in the body into which the insert piece is inserted is provided so that the extra length storage case stands up against the box when the insert piece is inserted into the groove. It is something to do.

The optical fibers mentioned here include bare optical fibers with a primary coating, primary coatings with a buffer nuclide,
There are so-called coated optical fibers, such as those with a secondary coating and two-layer coating (reinforcing coating), those with a buffer layer between the primary coating and secondary coating, and those with a single reinforcing coating. means. Further, the term "optical cable" refers to a cable that includes a plurality of optical fibers within a sheath, a cable that includes a plurality of optical fibers within a reinforcing coating, and the like.

〔Example〕

8141 to 3 show an embodiment of the connecting portion of the present invention.

In the figure, 1 is a metal or resin case, and the box body 3
and a single-opening lid 5. An introduction section 9 for the optical cable I is provided on both side walls of the box body 30. Further, a mounting board 11 is fixed to the bottom of the box body 3. A large number of extra length storage cases 13 are arranged one on top of the other on this mounting board 11.

Each extra length storage case 13 has an optical fiber connection part holder 17 on the bottom plate 15. A drum 19 that regulates the minimum winding diameter of the optical fiber and an optical fiber (periphery folded piece 2 for preventing protrusion)
1 etc. is the same as the conventional one, but in this example, an insertion piece 23 is further provided protruding from the center of the upper side. The insertion piece 23 has two holes formed therein, and the mounting board 11 has two guide rods 25 erected in correspondence with the holes. 11 is bent at right angle so as to face. Each extra length storage case 13
is housed in the box body 3 with the guide rod 25 passed through the hole of the insertion piece 23, as shown in FIG.

Locking pieces 27 are provided protruding from both sides of the extra length storage case 13 located at the frontmost side (top). A bracket 29 is erected on the mounting board 11 in correspondence with the locking piece 2T. When the locking piece 2T is screwed to this bracket 29, all of the extra length storage cases 13 will not move within the box body 3.

A pair of supports 31 are erected at the center of the upper side of the mounting board 11, and a pair of stands 33 are fixed to the upper ends of the supports 31. A large number of grooves 35 are formed in the stand 33 in a direction perpendicular to the surface of the mounting board 110 and in a direction parallel to the upper side of the mounting board 11. This #1
35 is for inserting the insert piece 23 written in MIJ. The pitch of the grooves 35 is the same as or slightly larger than the pitch of the insertion pieces 23 when the extra length storage cases 13 are stacked.

The configuration of the connection surface is as described above, or its usage is as follows. The optical cable T introduced into the box body 3 is separated into each optical fiber 7 eyeper 37 by stripping off the outer jacket or reinforcing coating. Take out all the extra length storage cases 13 from the main body 3, select the optical fiber to be connected first, connect it, and store its joint and extra length in the first extra length storage case 13. Then, store it in the box body 3.

The same operation is performed for the next optical fiber to be connected. In this way, the Hikari 7 Eyepers are connected one after another, and when the last extra length storage case is stored in the box body 3, the locking piece 2T is fixed to the bracket 29, and the lid 5 is closed. .

If it is necessary to reconnect or switch the optical fiber at the back during such connection work or after the connection is completed, move the remaining length storage case closest to you to the guide rod 25. Pull out the insert piece 23 from
into the groove 35 of the stand 33, and attach the extra length pivot case 1.
3 on stand 33. Repeat these operations to expose the desired excess length storage case and perform the necessary operations. Figure 3 shows extra length storage case 1 from the top to the second sheet.
3 on stand 33, and necessary work is performed on the optical fiber stored in the third extra length storage case.

The direction can be changed as appropriate.

〔Effect of the invention〕

As explained above, according to the present invention, the extra-length storage case taken out from the box can be placed on the stand, so the extra-length storage case can be temporarily installed extremely easily and stably. The installation space is also small. Furthermore, since the movement of the extra length storage case taken out from the box is constant, there is no risk of unnecessary tension being applied to the optical fiber.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the optical cable connection surface according to an embodiment of the present invention with the lid open, and Fig. 2 is a sectional view taken along the line ■--... Fig. 1 shows the connection box with the lid closed. , FIG. 3 is a side view showing a state in which a part of the extra length storage case of the connection box is erected on a stand. 1...Box body, 3...Box body, 5...
... Lid, 1 ... Optical cable, 13 ...
・Extra length storage case, 23...Insert piece, 25・
...Guide rod, 33 ...Stand, 35
...Groove, 37...Optical fiber.

Claims (1)

[Claims] (1) At the optical cable connection surface where a plurality of extra length storage cases for optical fibers are placed one on top of the other in a box, an insertion piece is formed in each of the extra length storage cases, and the insertion piece is attached to the box. An optical cable connection surface characterized in that a stand having a groove for insertion is provided so that the extra length storage case stands up against the box when the insertion piece is inserted into the groove.