JPH11258444A - Optical fiber storing case and its layered product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the thickness of a layered product when plural sheets of optical fiber storing cases are laminated. SOLUTION: An optical fiber storing case 1 has a connecting part storing part 5 for storing a connecting part of an optical fiber provided in the middle part of one of two sides in the cross direction of the case. The thickness t1 of the connecting part storing part 5 is such a thickness that the connecting part is not projected in the direction of thickness, and the thickness t2 of a portion outside the connecting part storing part 5 is made thinner than the thickness of the connecting part storing part 5. A recessed part 11 in which the connecting part storing part 5 is accommodated is provided in the middle part of the other sides of two sides in the cross direction of the case. In two sides in the cross direction of the case, both sides of the connecting part storing part 5 and both sides of the recessed part 11 are provided with rotating shafts 13. An optical fiber introduction port 15 is provided in both ends of two sides in the direction of depth of the case. Plural storing cases 1 are laminated in such a manner that with the vertically adjacent storing cases, the side on the connecting part storing part 5 alternates with the side on the recessed part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case for accommodating a connecting portion of an optical fiber cable and a surplus portion thereof, and a laminate thereof.

[0002]

2. Description of the Related Art In general, an optical fiber core storage case has a substantially rectangular dish shape having a width dimension larger than a depth dimension. The thickness is determined so that the larger of the thicknesses when the portion is wound in a loop shape can be stored without any trouble.
In recent years, the connection portion has also been reduced in size, but the optical fiber core has also been reduced in diameter, so the thickness of the connection portion is thicker, so the thickness of the optical fiber core storage case is At present, it is determined by the thickness of the connection part.

[0003] When the optical fiber core wire storage case is housed in a closure or the like of an optical cable connection portion, a required number of storage cases are stacked and housed. Then, as a method of selecting an arbitrary storage case from among a large number of stacked storage cases and performing an operation, a method of pulling out the storage case to be operated to the near side (a drawer method) and a method of drawing out the stacked storage cases There is a method (rotation method) in which a work space is secured on the upper surface of a storage case in which the work is performed by rotating the work, and the work is performed.

Comparing the draw-out method and the rotation method, in the draw-out method, when the storage case is pulled out, the optical fiber core is pulled and when the storage case is returned, the optical fiber core is loosened. On the other hand, in the rotation method, the rotation method is more often used because there is a merit that if the introduction port of the optical fiber is located near the rotation center axis, the optical fiber is less likely to be pulled.

[0005] However, even in the rotation method, if the rotation angle becomes large, the curvature of the optical fiber core cannot be maintained. For example, it is necessary to devise a way to secure a working space without increasing the rotation angle. It is. For this reason, conventionally, the storage case is rotated around one side in the case width direction (the side on the back side as viewed from the work position) as an axis, and the work is performed in any storage case among a large number of stacked storage cases. When performing the above, while rotating the storage case above the storage case to work upward, and rotating the storage case below the storage case to work downward,
The small rotation angle ensures a sufficient working space. This method also has the advantage that work can be performed on one side.

[0006]

However, in order to enable each of the stacked storage cases to rotate, it is necessary to provide a gap between the storage cases. This will be described with reference to FIG. In FIG. 9, reference numeral 1 denotes an optical fiber core storage case, t denotes the thickness of the storage case 1, θ denotes an angle by which the storage case 1 is rotated, and a denotes the stacked storage cases 1, 1,. The space between the storage cases 1 and 1 required for rotation. The gap a can be determined by the following equation.

[0007]

## EQU00001 ## a = t {(1 / cos .theta.)-1}

As is clear from this equation, the gap between the storage cases 1 and 1 is given by the same rotation angle θ.
It is necessary to increase the thickness in proportion to the thickness of the storage case 1.
In other words, the larger the thickness of the storage cases, the larger the gap between the storage cases needs to be.

[0009] The thickness of the conventional storage case is determined by the thickness of the connection portion of the optical fiber, and in the case of the rotation type, the thickness when a large number of storage cases are stacked is the sum of the thicknesses of the storage cases. And the sum of the thicknesses of the gaps between the storage cases. For this reason, the thickness of the storage case laminate increases, and when the storage case laminate is stored in a closure or the like, the number of storage cases is limited, or if the number of storage cases is increased, the size of the closure or the like increases. There was a compelling problem.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the thickness of a laminated body when a plurality of optical fiber core storage cases are stacked by a rotating method, and to greatly reduce the thickness of the laminated body. An object of the present invention is to provide an optical fiber core wire storage case capable of storing a long portion at high density and a laminate thereof.

[0011]

SUMMARY OF THE INVENTION An optical fiber core storage case according to the present invention is a case for storing a connection portion and an extra connection portion of an optical fiber core wire, the width dimension being larger than the depth dimension, A connection part storage part for storing the connection part of the optical fiber core wire is provided inside the middle part of one of the two sides in the case width direction, and the thickness of the connection part storage part is the thickness of the connection part. The thickness of the case other than the connecting portion housing portion is smaller than the thickness of the connecting portion housing portion, and the middle portion of one of the two sides in the case width direction is set to a thickness that can be stored without protruding in the direction. A dent portion large enough to receive the connection portion storage portion; a rotation shaft provided on the side provided with the connection portion storage portion and / or a side provided with the depression portion; and both ends of the side provided with the rotation shaft Or that an optical fiber cable inlet is provided in the vicinity. It is an.

Further, in the laminated body of the optical fiber core storage case according to the present invention, a plurality of the storage cases described above, and the storage part side adjacent to the upper and lower sides of the connection part storage part side and the side of the dent part side are alternately arranged. So that the rotation axis of each storage case is located on the back side when viewed from the working position side,
The rotating shaft on the back side of each storage case is rotatably supported by a support at a pitch smaller than the thickness of the connection portion storage portion and larger than the thickness of portions other than the connection portion storage portion. .

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. The optical fiber core storage case 1 guides, on a bottom plate 3, a connection part storage part 5 for storing a connection part of the optical fiber core by a connector or the like and a connection extra length part of the optical fiber core in a loop shape. It is a substantially rectangular dish with the guide wall 7 and the like formed integrally. Numeral 9 is a piece for preventing the optical fiber from jumping out from the upper end of the guide wall 7 in parallel with the bottom plate 3. In the use state of the storage case 1, the direction of the longer side of the rectangle is the case width direction, and the direction of the shorter side is the case depth direction.

The connecting portion housing 5 is formed inside the middle of one of the two sides in the case width direction. The case thickness t ₁ of the connection part storage part 5 is a thickness capable of storing the connection part of the optical fiber without protruding in the thickness direction, and the case thickness t ₂ of the part other than the connection part storage part 5 is the connection. The thickness is smaller than the thickness t ₁ of the storage section (FIG. 1B,
(C)).

In the middle of the other of the two sides in the width direction of the case, there is formed a recess 11 having a size enough to receive the connection portion housing 5. The rotation shaft 1 is symmetrically provided on both sides of the connecting portion housing portion 5 on the side where the connection portion housing portion 5 is provided and on both sides of the concave portion 11 on the side where the recess portion 11 is provided.
3 are formed. Further, optical fiber introduction ports 15 are formed at both ends of the side where the rotation shaft 13 is provided.

Since the storage case 1 of this embodiment has the above-described configuration, for example, as shown in FIG.
When the sides on the side of the connection part storage section 5 and the sides on the side of the recessed part 11 are stacked alternately, as shown in FIG. The other storage case 1 falls into the recess 11. As a result, the thickness when the two storage cases 1 and 1 are stacked is substantially the same as the thickness when the thin portions other than the connection portion storage portion 5 are stacked. This means that the thickness after lamination can be greatly reduced as compared with a conventional case where the storage cases are determined by the thickness of the connection portion storage portion.

Further, even if the sides of the two storage cases 1 on the side of the connection part storage part 5 and the sides of the dent part 11 are alternately stacked, the rotating shaft 13 is the same on both sides. Since it is formed, the front side of the storage case 1 can be opened and closed by rotatably supporting the rotating shaft on the back side as viewed from the working position on the support.

Further, since the optical fiber cable introduction ports 15 are formed at four corners, as shown in FIGS. 4A and 4B, the rotation shaft 13 on the side of the recess 11 is supported by the support. In this case, the optical fiber core 17 is introduced from the introduction port 15 on the side of the recess 11 to support the rotation shaft 13 on the side on the side of the connection storage section 5 as shown in FIGS. In the case where the optical fiber core 17 is introduced into the body, the optical fiber core 17 is introduced from the introduction port 15 on the connection part housing part 5 side.
7 is close to the rotation center axis of the storage case 1, so that when the storage case 1 is rotated, the optical fiber
7 is less likely to be pulled. In FIG. 4, reference numeral 19 denotes a connection part of the optical fiber core housed in the connection part housing part 5.

Next, the laminated structure of the storage case 1 configured as described above will be described with reference to FIGS.
When a plurality of storage cases 1 are stacked, as shown in FIG. 5, the storage case 1 is vertically stacked so that the side on the connection part storage part 5 side and the side on the dent part 11 side are alternated. I do. On the other hand, the rotating shaft mounting portion 23 of the support 21 that supports the rotating shaft 13 of each storage case 1 is smaller than the thickness t ₁ of the connecting portion storing portion 5 and the thickness t of the portion other than the connecting portion storing portion 5.
It is formed with a pitch greater than ₂ .

Accordingly, when the storage case 1 in which the side on the connection part storage part 5 side and the side on the dent part 11 side are alternately stacked is mounted on the rotary shaft mounting part 23 of the support 21 in order, as shown in FIG. That is, the protrusion in the thickness direction of the connection part storage part 5 falls into the dent part 11 of the adjacent storage case 1,
Parts other than the connection part storage part 5 are laminated with a gap a required for rotation of the storage case 1. As a result, each of the storage cases 1 is rotatable in a direction in which the front side moves up and down, and as shown in FIG. 7, the storage case 1 above the storage case 1s to be worked is rotated upward and the storage case 1s and below. By rotating the storage case downward, a sufficient work space can be secured with a small rotation angle. The thickness of the laminate of the storage case 1 is
Since the thickness of the storage case 1 is smaller and the thickness of the gap a is smaller than in the conventional case, the thickness can be significantly reduced as compared with the conventional case if the number of stacked layers is the same.

FIG. 8 shows another embodiment of the present invention. The optical fiber core storage case 1 has two holes 25 formed in the bottom plate 3 of the connection part storage part 5. In many cases, the optical fiber cores are connected by an MT connector 27 as shown in FIG. 8 (c). In the MT connector 27, a part of a leaf spring 27B for maintaining a connected state of the connector main body 27A protrudes downward. It is a form to do. The hole 25 is for dropping a protruding portion of the leaf spring 27B toward the lower surface side. By doing so, there is an advantage that the thickness t ₁ of the connection portion storage portion 5 can be reduced. Since the configuration other than the above is the same as that of the storage case of FIG. 1, the same portions are denoted by the same reference numerals and description thereof will be omitted.

In the above embodiment, the case where the rotating shaft 13 is provided on both the side on the connecting portion housing portion 5 side and the side on the concave portion 11 side has been described. , Or on the side of the dent. In this case, two types of storage cases, in which the rotation shaft is provided on the side of the connection portion storage portion side and a storage case in which the rotation shaft is provided on the recessed portion side, are manufactured, and these may be alternately laminated. Further, in the case of a storage case in which the rotation axis is provided on the side on the connection part storage part side, the optical fiber core wire introduction ports only need to be provided at both ends (or near) of the side on the connection part storage part side,
Similarly, in the case of a storage case in which the rotating shaft is provided on the side of the dent side, the optical fiber core wire introduction ports need only be provided at both ends (or in the vicinity) of the side of the dent side.

In the case of a structure in which the rotating shaft is provided on both the side on the connection part storage part side and the side on the dent part side, only one kind of storage case has to be manufactured, so that the die cost is low and the manufacturing efficiency is high. There is an advantage that. On the other hand, the rotating shaft
In the case of a structure provided on one of the sides on the side of the dent,
Since it is necessary to manufacture two types of storage cases, the cost of the mold is high, but since there is no need to provide an optical fiber core wire inlet on the side without the rotation axis, the corner can be rounded. There is an advantage that the optical fiber core wire does not need to be caught.

[0024]

As described above, according to the present invention, when a plurality of optical fiber core storage cases are stacked so as to be rotatable, the thickness of the stacked body can be significantly reduced compared with the conventional case.
The connection portion and the extra connection portion of the optical fiber can be stored at a high density. Therefore, when the stacked body of the storage case is stored in the closure or the like, the number of storage cases can be increased if the storage space is the same, and the size of the closure or the like can be reduced if the storage number is the same.

[Brief description of the drawings]

1A and 1B show an embodiment of an optical fiber core storage case of the present invention, wherein FIG. 1A is a plan view, FIG. 1B is a front view, and FIG.
3A is a cross-sectional view taken along the line cc in FIG.

FIG. 2 is a perspective view showing how to stack two storage cases of FIG. 1 when they are stacked.

3A and 3B show a state in which two storage cases of FIG. 1 are stacked, FIG. 3A is a plan view, and FIG. 3B is a cross-sectional view taken along line bb of FIG.

FIG. 4 shows a case where a plurality of storage cases of FIG. 1 are stacked;
(A) is a plan view showing the storage state of the optical fiber core wires of the odd-numbered storage case from the bottom (or from the top), (b) is a cross-sectional view taken along the line bb of (a), and (c) is Plan view showing the storage state of the optical fiber core wire of the even number storage case,
(D) is sectional drawing in the dd line of (c).

FIG. 5 is a sectional view showing a state before a plurality of storage cases of FIG. 1 are stacked and attached to a support.

FIG. 6 is a sectional view showing a state in which a plurality of storage cases of FIG. 1 are stacked and attached to a support.

7 is a cross-sectional view showing a state in which a work space for an arbitrary storage case has been secured from the state of FIG. 6;

8A and 8B show another embodiment of the optical fiber core storage case of the present invention, wherein FIG. 8A is a plan view and FIG.
Sectional drawing in a b line, (c) is sectional drawing which shows the state which accommodated the MT connector in the connection part storage part of the storage case of (a).

FIG. 9 is an explanatory view showing the relationship between the thickness of the storage case and the gap between the storage cases when the optical fiber core storage cases are stacked.

[Explanation of symbols]

 1: Optical fiber core wire storage case 3: Bottom plate 5: Connection part storage portion 7: Guide wall 11: Depressed portion 13: Rotating shaft 15: Optical fiber core wire inlet 17: Optical fiber core wire 19: Optical fiber core wire Connection part 21: Support body 23: Rotating shaft mounting part

Claims (2)

[Claims] 1. A case for accommodating a connection portion and a connection extra length portion of an optical fiber core wire, wherein a width dimension is larger than a depth dimension, and an intermediate portion of one of two sides in a case width direction. A connection part storage part for storing the connection part of the optical fiber is provided inside the case, and the thickness of the case of the connection part storage part is a thickness that allows the connection part to be stored without protruding in the thickness direction, and the connection part storage part. The case thickness of the other part is made smaller than the thickness of the connection part storage part, and a recessed part having a size that the connection part storage part fits is provided in the middle part of one of the two sides in the case width direction, A rotation shaft is provided on the side provided with the connection part storage part and / or the side provided with the dent part, and an optical fiber cable introduction port is provided at or near both ends of the side provided with the rotation axis. An optical fiber core storage case. 2. The storage case according to claim 1, wherein a plurality of storage cases vertically adjacent to each other have a connection part storage part side and a dent part side which are alternately arranged and viewed from a working position side. The storage case is stacked so that the rotation axis of each storage case is located on the back side, and the rotation shaft on the back side of each storage case is set at a pitch smaller than the thickness of the connection part storage part and larger than the thickness of the parts other than the connection part storage part. And a support body rotatably supported by the support body.