JP4007926B2 - Optical fiber cord extra length storage tray - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical fiber extra wire length storage tray used for an optical cable connection box or the like.
[0002]
[Prior art]
The optical fiber core wire extra length storage tray stores the connection portion of the optical fiber core wire and its extra length. The connection portion holding portion for holding the optical fiber core wire connection portion and the extra length of the optical fiber core wire And an extra-length storage section for storing the storage space.
[0003]
The connecting portion holding portion includes a plurality of partition walls erected on the bottom plate of the tray so as to form a storage concave portion of the optical fiber core wire connecting portion, and a slanting portion from the partition wall on one side of the storage concave portion into the storage concave portion. It is comprised with the elastic piece formed so that it might extend. The elastic piece functions to press and stabilize the connecting portion housed in the housing recess against the partition wall on the opposite side.
[0004]
Further, the extra length storage part is composed of a space between a peripheral wall projecting around the bottom plate and a core wire guide wall projecting substantially at the center of the area excluding the connection part holding part of the bottom plate. The The upper end edge of the peripheral wall and the core wire guide wall is formed with a jump-out preventing piece that prevents the optical fiber core wire stored in the extra length storage portion from jumping out of the tray.
[0005]
[Problems to be solved by the invention]
The connecting part holding part provided in the conventional optical fiber core wire extra length storage tray simply presses the optical fiber core wire connection part against the partition wall on the opposite side by the elastic piece formed on the partition wall on one side of the storage recess. Since the connection portion is held, there is a possibility that the connection portion may come out upward from the storage recess when vibration or impact is applied to the tray.
[0006]
In view of the above problems, an object of the present invention is to provide an optical fiber core wire extra-length storage tray that can prevent the optical fiber core wire connection portion held by the connection portion holding portion from coming out of the storage recess. It is in.
[0007]
[Means for Solving the Problems]
In order to achieve this object, the present invention includes a connection portion holding portion that holds a connection portion of an optical fiber core wire, and an extra length storage portion that stores an extra length, and the connection portion holding portion is provided on the bottom plate. An optical fiber composed of a partition wall erected so as to form a storage recess of the connection portion, and an elastic piece formed so as to extend obliquely from the partition wall on one side of the storage recess into the storage recess In the extra wire length storage tray, the extension length of the elastic piece from the partition wall gradually increases with a constant gradient from the lower side of the elastic piece toward the upper side. It is what.
If it does in this way, since a part by the free end side of an elastic piece will be covered on the optical fiber core wire connection part located in a storage recessed part, it will become difficult to pull out a connection part from a storage recessed part.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
[Embodiment 1] FIGS. 1 to 3 show an embodiment of an optical fiber core wire extra length storage tray according to the present invention. In the figure, 10A and 10B are optical fiber core wires to be connected, 12 is a splice connection (splice connection or mechanical splice connection) of optical fiber cores 10A and 10B, 14 is a bottom plate of the tray, and 16 is a tray plate. A peripheral wall 18 is a connecting portion holding portion for holding the connecting portions 12 of the optical fiber cores 10A and 10B, and 20 is an extra length accommodating portion for accommodating the extra lengths of the optical fiber core wires 10A and 10B.
[0012]
The surplus length storage portion 20 is the same as the conventional case, the peripheral wall 16 protruding from the periphery of the bottom plate 14, and the core guide protruding from the substantially central portion of the region excluding the connection portion holding portion 10 of the bottom plate 14 It consists of a space between the wall 22. The upper end edges of the peripheral wall 16 and the core wire guide wall 22 are formed with pop-out preventing pieces 24 that prevent the optical fiber core wires 10A and 10B housed in the extra length housing portion 20 from jumping out of the tray.
[0013]
On the other hand, the connection portion holding portion 18 includes a plurality of partition walls 28 erected in parallel with the straight portion of the peripheral wall 16 so as to form the storage recess portion 26 of the connection portion 12 on the bottom plate 14, and each partition wall 28. The elastic piece 30 is formed so as to extend obliquely into the storage recess 26 on one side (peripheral wall side). The partition wall 28 is divided into three end portions 28a and 28b and an intermediate portion 28c in the longitudinal direction, and the elastic piece 30 is formed to extend obliquely from both ends of the partition wall intermediate portion 28c. Further, stoppers 32 are provided at the outer ends of the partition wall both ends 28a and 28b so as to restrict the movement of the connecting portion 12 in the longitudinal direction. A hole 34 (see FIG. 2) formed in the bottom plate 14 is a punched hole of an injection mold for forming the elastic piece 30.
[0014]
The connection part holding part 18 is characterized in that the length of extension from both ends of the partition wall intermediate part 28c of the elastic piece 30 is from the lower side (bottom plate side) of the elastic piece 30 to the upper side (storage recess). It is gradually becoming longer with a certain gradient as it goes from the deep part of 26 to the shallow part. If the open end of the elastic piece 30 is formed in such a shape, when the elastic piece 30 is pressed against the partition wall 28 on the opposite side by the elastic repulsion force, the connecting portion 12 stored in the storage recess 26 is shown in FIG. As shown in B), an elastic repulsive force P is applied obliquely downward to the connecting portion 12, and the component force P ₁ acts to push the connecting portion 12 into the housing recess 26. For this reason, even if vibration or impact is applied to the tray, the connection portion 12 can be prevented from coming out of the storage recess 26.
[0015]
FIG. 3B shows the case where the connecting portion 12 has a substantially circular cross section, but the same applies to the case where the connecting portion 12 has a substantially square cross section. When the connecting portion 12 has a substantially circular cross section, the height of the elastic piece 30 from the bottom plate 14 may be approximately the same as or larger than the diameter of the connecting portion 12, but when the cross section is substantially square, The height needs to be larger than the height of the connecting portion 12 (the length of both sides).
[0017]
【The invention's effect】
As described above, according to the present invention, when the optical fiber core wire connecting portion is pushed into the housing recess of the connecting portion holding portion, the connecting portion is pressed against the partition wall on the side opposite to the elastic piece by the elastic repulsive force of the elastic piece. In addition, the lateral movement of the connecting portion is restricted, and a part of the free end side of the elastic piece is covered on the connecting portion, so that the connecting portion can be prevented from coming out of the storage recess. Therefore, the optical fiber core wire connection part can be held more stably.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of an extra fiber length extra storage tray according to the present invention.
2 is a plan view, FIG. 2 (B) is a sectional view taken along line BB in FIG. 1 (A), and FIG. 2 (C) is a sectional view taken along line CC in FIG. Sectional drawing.
3 shows a state in which the optical fiber core wire connection part is held by the connection part holding part of FIG. 2, (A) is a perspective view, and (B) is a cross-sectional view of the main part.
10A, 10B: Optical fiber core wire
12: Optical fiber core connection
14: Bottom plate
16: Circumference wall
18: Connection holding part
20: Extra length storage
26: Storage recess
28: Partition wall
30: Elastic piece

Claims (1)

A connecting portion holding portion that holds the connecting portion of the optical fiber core wire, and an extra length accommodating portion that accommodates the extra length, so that the connecting portion holding portion forms an accommodation recess of the connecting portion on the bottom plate In the optical fiber core wire extra-length storage tray, which is composed of an upright partition wall and an elastic piece formed so as to extend obliquely from the partition wall on one side of the storage recess into the storage recess. Optical fiber core wire extra-length storage tray characterized in that the length of extension from the partition wall of the piece gradually increases with a constant gradient from the lower side of the elastic piece toward the upper side. .

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