JPS61249005A - Method for holding surplus length part of optical cord - Google Patents

Abstract

PURPOSE:To house orderly an optical cord consisting of a large number of cores with simple and inexpensive constitution by the constitution consisting in fitting and holding the surplus length part of the optical code into the plural adjacent grooves of a surplus length holding plate in a box body. CONSTITUTION:Broad parts 12a are provided on the open end side of the plural grooves 12 formed by notching a surplus length holding plate 11 horizontally to the plate plane and narrow parts 12b are provided on the close end side thereof. Such plate is installed in an upright state to the inside surface of the box body 13. Stoppers 15 attached to the surplus length part 16a of the optical cord 16 are press-fitted into the broad parts 12a of the grooves 12 to hold the part 12a. The surplus length part is thus housed orderly into the small space by the simple operation of fitting merely the surplus length part into the grooves; in addition the construction is simple and the cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a holding method for storing an extra length of an optical cord in a junction box for optical cables.

(Prior Art) Conventionally, as a means for accommodating the extra length of an optical cord in a junction box of an optical cable, a method as shown in FIG. 5 is known.

In this case, a cylinder 3 for ensuring the minimum curvature of the optical cord 2 is fixed in a box-shaped extra length storage case 1, and the optical cord 2 is wound around the outer circumference of the cylinder 3, and both ends of the cord winding part, that is, the extra length Both ends of the section are fixed with fasteners 4 and held in place.

However, in the case of the extra length storage case 1, since it is box-shaped, if it is stored in multiple layers in the junction box 5 as illustrated in FIG. 6, a considerable amount of space must be secured, which is costly. It also becomes more expensive.

In addition, in the case of the extra length storage case l in a stacked state, since the vertically adjacent cases become obstacles to each other, it becomes difficult to take the optical cord 2 in and out of the connection box 5.
Even if a case loading/unloading function is added, such workability is not sufficiently improved.

(Problems to be Solved by the Invention) In view of the above-mentioned problems, the present invention provides a novel method for holding the extra length of an optical cord, in which an optical cord with a large number of fibers can be stored in an orderly manner and with good workability. The purpose is to provide a simple structure and low cost.

(Means for Solving the Problems) The present invention provides a holding method for storing an extra length of an optical cord in a box, in which the extra length has a plurality of grooves arranged adjacent to each other in the box. The above problem was solved by attaching a length holding plate and holding the extra length of the optical cord wound in a loop by fitting it into the groove of the extra length holding plate. It is.

(Function) In the case of the method of the present invention, each optical cord whose extra length is to be taken is drawn into the box, and after winding these optical cords into a loop to form a loop-shaped extra length, each extra length is removed. These are held by fitting into each section of the long holding plate.

(Example) Hereinafter, examples of the present invention will be described with reference to the drawings.

In the embodiment shown in FIG. 1, the extra length holding plate 11 has a rectangular shape as an example, and the extra length holding plate 11 has a plate surface of the holding plate ll from one long side to the opposite side. A plurality of grooves 12 are formed.

These plurality of grooves 12 are parallel to the horizontal sides of the extra length holding plate 11, and the intervals between them are equal or unequal in the vertical direction.

Each groove 12 in FIG.
The closed end side thereof is a narrow portion 12b, and the wide portion 12a and the narrow portion 12b are adjacent to each other in the longitudinal direction of the groove 12.

Note that the length of the groove 12 of the extra length holding plate 11 is selected to be a dimension that can guarantee the minimum curvature necessary for forming a loop of the optical cord.

The extra length retaining plate 11 is placed in the box (junction box) 13 in an upright position with its groove 12 horizontal, and is attached to the inner surface 13a of the box 13 via a support 14 such as a bolt. It is being

Inside the wide portion 12a of each groove 12, a stopper 15 can be attached and detached as described later.

This stopper 15 is formed of rubber, soft plastic, etc. into a ring shape as shown in FIG. , and its outer diameter is slightly larger than the groove width of the wide portion 12a, and the stopper 15 has a slit 15b formed therein to facilitate fitting of the optical cord into the hole 15a. ing.

In FIG. 1 mentioned above, the extra length of the optical cord 1B is taken,
When the extra length portion 18a is housed and held within the box body 13, the following is an example.

A connector (not shown) is attached to the tip of the optical cord 1B to be cut to an extra length, and after the optical cord IB is loop-wound to form an extra length lea, the extra length le
A stopper 15 is attached to each predetermined location of a,
The extra length part 16a is fitted into the groove 12 of the extra length holding plate 11, and the stopper 15 attached to the extra length part lea is press-fitted into the wide part 12a of the groove 12 to maintain its fitted state. is retained.

In this way, the extra length tea of the optical cord 1B is neatly stored by the extra length holding plate 11 inside the box body 13.

Next, another embodiment of the present invention will be described with reference to FIGS. 2 and 3.

In the embodiments shown in FIGS. 2 and 3, the groove 12 is formed in the extra length holding plate 11, and the extra length holding plate 11 is attached to the inner surface 13a of the box body 13, as described above. In the example, the extra length holding plate 11 is formed thickly by plywood structure,
The groove width of each groove 12 is substantially constant in its longitudinal direction.

Roughly speaking, rail portions 12c and 12d, which are, for example, concave grooves, are formed on both the upper and lower inner surfaces of each groove 12, and using these rail portions 12c and 12d as guides, approximately U is formed inside the groove 12.
A letter-shaped holder 17 can be taken in and out.

In the embodiments shown in FIGS. 2 and 3, the extra length lea of the looped optical cord 1B is fitted into the holder 17, and the stopper 15 attached to a predetermined position of the extra length tea is inserted into the holder 17. It is press-fitted into the holder 17 and the fitted state is maintained.

The extra length part 1f3a held by the holder 17 in this way is fixed to the extra length holder plate 11 by fitting the holder 17 into the groove 12 of the extra length holder plate 11 using the rail parts 12c and 12d as guides. It is held at 11.

In this embodiment as well, the extra length portion 113a of the optical cord 18 is neatly stored by the extra length holding plate 11 inside the box body 13.
In the case of this embodiment, since the extra length part lea is held through the holder 17, when the extra length part lea fitted into one groove 12 is refitted into the other groove 12, etc. The loop form of the long part lea does not collapse, so the extra length l
Handling of ea becomes easy.

The grooves 12 formed in the extra length retaining plate 11 may be horizontal as shown, but may also be vertical or inclined (not shown), and both ends of the grooves 12 may be closed.

If both ends of the groove 12 are closed, the extra length holding plate 11
The extra length portion 18a is inserted into or removed from the groove 12 from the direction of the plate surface.

(Effects of the Invention) As explained above, the method for retaining the extra length of the optical cord according to the present invention is a simple method that involves simply fitting the extra length of the optical cord into the groove of the extra length retaining plate installed inside the box. By the operation, a desired number of the remaining lengths of the optical cords can be neatly stored and held in a small space.

Moreover, since it is a simple means mainly consisting of an extra-length holding plate having grooves, it is possible to reduce equipment costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part showing one embodiment of the method for holding an optical cord with excess length according to the present invention, FIGS. 2 and 3 are perspective views showing other embodiments of the same as above, and FIG. FIG. 5 is a perspective view of the stopper used in each of the above embodiments, FIG. 5 is a perspective view of a conventional example of an extra length storage case, and FIG. 6 is a cutaway front view of the cases stacked and stored in a junction box. be. 11...Extra length holding plate 12...Groove 12a...Groove wide part 12b...Groove narrow part 13...Box body 15 ... Stopper 1B ... Optical cord 1ea - ... Optical cord extra length 17 ... Holder Agent Patent attorney Yoshio Saito No. 1g4 No. 21 !1 Figure 3 Figure 4

Claims (5)

[Claims] (1) In a holding method for storing the extra length of an optical cord in a box, an extra length holding plate having a plurality of grooves arranged adjacent to each other is installed inside the box, and the extra length is held in a loop shape. A method for holding an extra length of an optical cord, comprising the step of holding the extra length of a wound optical cord by fitting the extra length into a groove of the extra length holding plate. (2) In the groove of the extra length retaining plate, the wide part and the narrow part are adjacent to each other in the longitudinal direction, and the end of the wide part is open, so that light can pass through the wide part and the narrow part. A method for holding an optical cord extra length according to claim 1, wherein the extra length of the cord is fitted. (3) The groove of the extra length retaining plate has a constant groove width along its longitudinal direction and is open at one end, and the extra length of the optical cord has a substantially U-shaped groove that closes the open end of the groove. A method for holding an extra length of an optical cord according to claim 1, wherein the extra length of an optical cord is held by a holder and fitted into a groove thereof. (4) The light according to claim 1 or 2, wherein an elastic stopper is attached to the outer periphery of the extra length portion of the optical cord, and the stopper is in pressure contact with the groove of the extra length holding plate. How to hold extra cord length. (5) The extra length of the optical cord according to claim 3, wherein an elastic stopper is attached to the outer periphery of the extra length of the optical cord, and the stopper is pressed against the inner surface of the substantially U-shaped holder. How to hold parts.