JP2007047330A - Mounting mechanism of optical fiber storing case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of an optical fiber storing case, a structure facilitating storing operation of an optical fiber. <P>SOLUTION: The mounting structure of an optical fiber storing case (the case) is installed in a space inside a housing with an optical fiber cable connected, and includes a storing part for storing an excess length of an optical fiber. In this structure, to a pivotally attaching part provided in the housing so that a revolving shaft is situated near one end of the case, the case is pivotally attached at one end in a manner maintaining a prescribed opening/closing quantity. When the case is in a closed state, a part or the whole of the storing part of the case can be blocked, by means of a display plate which is situated opposite to the storing part of the case and which is provided inside the housing for the purpose of a desired display. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an optical fiber storage case mounted inside a casing of a CATV device or the like installed mainly in the middle of a light transmission type CATV transmission line, and more particularly to its mounting structure.

The conventional optical fiber storage case mounting structure includes two sets of guide rails formed in the box so as to sandwich the optical fiber storage case in the direction of the opening, and the guide rail provided on the optical fiber storage case. The optical fiber storage case can be pulled out to a position protruding from the opening of the box and is installed in the box via a pulling mechanism that holds the pulled-out state. According to the present invention, since the optical fiber storage case provided in the box is held in a state of protruding from the opening of the box, excessive stress is applied to the optical fiber. The storage operation can be performed smoothly without adding. In addition, since it is guided and pulled out by the guide rail, it can be easily pulled out, and can be pulled out without changing the system placed in the box, which puts excessive stress on the optical fiber. There is nothing.
(For example, see Patent Document 1)

As another method, an optical receiving unit including an optical / electrical signal conversion unit is accommodated in the box, and an extra length optical fiber accommodating unit as an optical fiber accommodating case is disposed above the optical receiving unit (opening). It has been introduced that it is configured such that it is superposed vertically so as to be partly) and is detachably fixed by known fixing means. According to the present invention, the extra-length optical fiber housing portion is provided with an extra length of the optical fiber so that the extra length of the drawn optical fiber and the optical fiber to be pulled out is long and does not get in the way. Depending on the situation, it can be rolled short and compact and stored in a small volume, it can be wound to a medium length, and it can also be wound with a large loop.
(For example, see Patent Document 2)

JP 2001-324620 A JP 2005-024760 A

By the way, as a suitable example of a device having such an optical fiber storage case, for example, considering an application such as a trunk amplifier installed in the middle of an optical transmission type CATV transmission line, these optical trunk amplifiers are used in a signal transmission line. In the operation to store extra length optical fiber because it is installed in the middle and may be installed at high places outdoors using messenger wires, etc., or it may be installed at high places such as walls and poles. However, it is required to perform the operation easily.
In the conventional optical fiber storage case shown in Patent Document 1, a guide wall for maintaining the minimum bending radius of the optical fiber and the optical fibers are provided in the optical fiber storage portion for storing the extra length of the optical fiber. Only a fixing part for holding and fixing the fusion spliced part when connected is formed, and no special operation is required to accommodate the optical fiber.

Now consider special operations. As a method for stably storing an optical fiber in a storage unit, as shown in Patent Document 2, for example, a jumping wall having a jumping claw at a tip protruding from the bottom of the optical fiber storage unit, An optical fiber is provided by providing a frame, placing the optical pawls in a groove formed between the opposing pawl walls and the frame, and arranging them appropriately so that the respective pawls oppose each other. There is a method of stably storing so as not to float from the storage unit. In such a method, since the optical fiber is correctly stored in the storage portion and does not lift from the storage portion due to the elastic force of the optical fiber, the optical fiber storage portion as in the conventional example shown in Patent Document 1 is used. However, there is no need for a lid of this type, but a special operation for housing the optical fiber is required, and as a result, the ease of operation is impaired.
In other words, in the configuration in which the optical fiber is housed in the housing portion formed by the minimum necessary members of only the guide wall and the fixed portion for improving the operability as in the conventional embodiment, the optical fiber is It is difficult to stably store in the storage unit due to the elastic force, so that the lid for preventing the optical fiber from floating from the storage unit can be opened and closed by a hinge as shown in the conventional example. It is necessary to prepare.

Further, in the conventional example 1, the optical fiber storage case can be pulled out to a position protruding from the opening of the box, and is configured to be installed in the box via a drawer mechanism that holds the pulled-out state. Thus, the optical fiber storage case is projected in a state of being arranged vertically on the front side of the box.
In the conventional example 2 as well, the optical fiber storage case is configured so as to be arranged vertically on the front side of the box, so that the worker can improve the visibility in the optical fiber storage operation, and it is reliable and easy. If priority is given to being able to work, it is desirable to construct the optical fiber storage case so that the position of the optical fiber storage case is directly opposite to the front of your eyes. However, in such a state, the arm is raised to the position of the line of sight, and maintenance of this posture places a burden on the construction worker.
Therefore, in this application, it was made to solve these problems.
An object of the present invention is to provide an optical fiber storage case mounting structure that can easily perform an optical fiber storage operation.
Another object is to provide an optical trunk amplifier having the optical fiber storage case.

In order to solve the above-mentioned problems, the invention of claim 1 is an optical fiber storage case mounting structure provided with a storage portion that is installed in a space in a housing to which an optical fiber cable is connected and stores an excess length of the optical fiber. In the optical fiber storage case, the optical fiber storage case maintains a predetermined opening / closing amount at a pivot portion disposed in the housing so as to have a rotation shaft near one end side of the optical fiber storage case. When the one end side of the optical fiber storage case is pivoted and the optical fiber storage case is closed, a desired display provided in the housing is provided at a position facing the storage portion of the optical fiber storage case. With this display plate, a part or all of the storage portion of the optical fiber storage case can be closed.

According to a second aspect of the present invention, there is provided the optical fiber storage case mounting mechanism according to the first aspect, wherein the housing is opened so that one surface thereof faces the horizontal direction and has a space therein, and the box. A lid body that opens and closes an opening, and the box body and the lid body are hinged so as to be freely opened and closed while maintaining a predetermined opening / closing amount at a lower edge portion of the box body and an upper edge portion of the lid body. The optical fiber storage case is pivotally mounted so as to be openable and closable so as to maintain a predetermined opening and closing amount at the lower edge of the pivot joint, and when the optical fiber storage case is fully opened. The optical fiber storage case is opened by a predetermined angle within a range where it does not overlap with the lid in a state of being opened smaller than 90 ° to 180 ° with respect to the plane formed by the open end of the space. Configured.

According to the first aspect of the present invention, in the mounting structure of the optical fiber storage case provided in the space in the casing to which the optical fiber cable is connected and having a storage portion for storing the extra length of the optical fiber, the optical fiber storage One end side of the optical fiber storage case is pivotally attached to a pivoting portion disposed in the housing so as to have a rotating shaft near one end side of the case so that the optical fiber storage case maintains a predetermined opening / closing amount. In addition, when the optical fiber storage case is closed, the display plate provided in the housing for performing a desired display at a position facing the storage portion of the optical fiber storage case, Since it is configured so that part or all of the optical fiber storage case can be closed,
If the mounting structure of the optical fiber storage case 4 according to the present invention is used, in order to improve the speed of storing the optical fiber, the optical fiber is placed in the storage portion formed by the minimum necessary members including the guide wall and the fixed portion. Even with a simple configuration for storing the optical fiber storage case, it is possible to use a display plate for performing a desired display provided in the box by a simple operation after storing the optical fiber. The optical fiber can be stably stored without making a special case cover and attaching the case cover so that it can be opened and closed with a hinge or the like.

According to a second aspect of the present invention, the casing is composed of a box body that is open so that one surface thereof faces in a horizontal direction and has a space inside, and a lid body that opens and closes the box body opening. The body and the lid are hinged so as to be openable and closable while maintaining a predetermined opening and closing amount at the lower edge of the box and the upper edge of the lid, and the optical fiber storage case is attached at the lower edge. When the optical fiber storage case is in a fully opened state, the optical fiber storage case is opened to the open end of the space. With respect to the plane formed by the structure, it is configured to open at a predetermined angle within a range of angles that do not overlap with the lid that is in an opened state smaller than 90 ° to 180 °.
The optical fiber storage case of the present invention is configured so that the storage portion of the optical fiber storage case is on the near side in the open state, and the construction worker improves the visibility in the optical fiber storage operation. When priority is given to working reliably and easily, the position of the optical fiber storage case can be always facing the opening of the storage part while looking below its own line of eyes, so the storage operation can be performed reliably. In addition to being able to do this, it is not necessary to raise the arm to a high position and operate it, so that the construction worker is not forced to take an unstable posture in the storage operation, so there is no burden.

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1A shows a first embodiment of the present invention, and is a front view of a trunk amplifier provided with an optical fiber storage case (a lid is not shown), and FIG. It is sectional drawing, (c) is a BB schematic sectional drawing. 2 (a) is a front view when the optical fiber storage case is opened, and FIG. 2 (b) is a schematic cross-sectional view taken along the line C-C. Shows the relationship). FIG. 3A is a top view showing a state when the optical fiber storage case according to the present invention is opened, and FIG. 3B is a schematic sectional view taken along the line DD. FIG. 4 is an enlarged view of a main part, with a part broken away, showing an embodiment of the pivoting portion of the optical fiber storage case according to the present invention. FIG. 5 is a perspective view of the second embodiment of the present invention, with the optical fiber storage case closed. FIG. 6 is a perspective view of the second embodiment with the optical fiber storage case opened. Fig.7 (a) is the elements on larger scale of the pivot part which concerns on 2nd Example, (b) is a schematic partial end elevation of the latching means in 2nd Example.
In addition, description of directions, such as up and down, right and left in description of the Example of this application shall show the positional relationship in a state in FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to FIGS. The Example of this invention has shown the front view of the state which removed the cover body of the optical trunk amplifier installed in the middle of the CATV transmission line using an optical cable.
In the figure, reference numeral 1 denotes a box having one opening forming the main body of the optical trunk amplifier, which is formed by, for example, aluminum die casting. The box 1 is provided with an optical fiber storage case 4 according to the present invention on the opening side through a display plate 5.

The optical cable 3 is drawn into the box 1 from the connecting portion 2 and is fixed by a known method. Further, the optical fiber 7 drawn out from the optical cable is fused and connected to an amplifier-side optical fiber 11 connected to a signal amplification circuit (not shown) in the box 1 via an optical connector 10. The extra lengths of the optical fiber before and after the fusion splicing part are stored in the optical fiber storage case 4. The fusion splicing portion 12 is protected by a fusion portion protection sleeve 13 (not shown) and is fixedly attached to a fixing portion 14 provided in the optical fiber storage case 4.

The optical fiber storage case 4 is made of, for example, a synthetic resin material and is opened so as to face the opening of the box 1 to form an optical fiber storage portion 4a for winding and storing the extra length of the optical fiber. ing. On the left and right side surfaces of the optical fiber storage portion 4a, notches 4b for inserting or pulling out optical fibers are appropriately disposed as necessary, and the upper end of the side surface of the optical fiber storage portion 4a or the light On the outer peripheral edge of the fiber storage portion 4a and the like, jumping claws 18 for preventing the stored optical fiber from jumping up are appropriately disposed as necessary.
Further, a guide wall 17 for guiding the storing operation and the fixing portion 14 for holding and fixing the fusion splicing portion 12 are formed in the optical fiber housing portion 4a. It is formed to be easy to store.
Further, the optical connector 10 is mounted by a fixing means not shown in the drawing protruding from the optical fiber storage case 4.

As shown well in FIG. 4, shafts 15 and 15 projecting outward from the respective side surfaces on the left and right side surfaces of the lower end portion 4c of the optical fiber storage case 4, and the optical fiber storage from the shafts. Stop portions 16, 16 projecting apart from each other by a predetermined dimension in the longitudinal direction of the side surface of the case 4 are formed. The shafts 15 and 15 are pivotally attached to pivotal portions 20 and 20 formed by cutting and forming the lower end portion of the display plate 5, and the optical fiber storage case 4 is closed, that is, in the present invention, the optical fiber storage portion. From the state in which the opening of 4a is closed by the display plate 5 to the state in which the optical fiber storage case 4 is opened by a predetermined amount, it is pivotally mounted so that it can be opened and closed.
The display board is for performing desired display such as light, rank amplifier type, electrical characteristics, and handling instructions shown as an embodiment of the present invention. In the present invention, the cover of the optical fiber storage case is used. It is also used.

Here, the pivot part 20 will be described. The pivoting portion 20 in the present invention pivots the shaft body 15 formed in the optical fiber storage case 4 in the shaft hole 22 formed in the bearing piece 21 formed by bending the lower end portion of the display plate 5 by press molding or the like. It is configured so that it can be opened and closed freely.
Further, a receiving piece 23 is formed integrally with the bearing piece 21 below the bearing piece 21. The periphery of the bearing piece 21 is formed to be smaller than the radius at which the stopper 16 rotates about the center of the shaft body 15 (in other words, the shaft hole 22) in the range of opening and closing operations of the optical fiber storage case. However, the lower end portion of the receiving piece 23 is formed so as to protrude downward so as to be larger than the rotation radius formed by the stopping portion 16, thereby opening the optical fiber storage case 4. Accordingly, since the stopper 16 is configured to contact the receiving piece 23, the opening / closing amount can be set to a predetermined amount and the optical fiber storage case 4 can be fixed. It is configured so that work can be performed stably.
Note that the opening / closing amount of the optical fiber storage case 4 of the present application is at least 90 ° (θ1 in the drawing) from the state in which the optical fiber storage case 4 is closed to a position (θ2 in the drawing) where it does not overlap with the housing lid. It is configured to open so as to be a predetermined position within the range.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the following description, the same components as those of the optical fiber storage case mounting structure in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In the second embodiment of the present invention, the structure and arrangement of the pivoting portion 20 are different from those of the previous embodiment. In the embodiment of the present invention, the connecting portion 2 for drawing the optical fiber formed in the box 1 is formed on the lower surface of the box 1 and the optical fiber is drawn from this connecting portion. In FIG. 5, reference numeral 1 b denotes a ramp provided inside the box 1 for guiding the optical fiber to the optical fiber storage case 4.

A display cover 19 is attached to the lower end of the display board 5. The display cover is, for example, a cover for protecting a state display lamp (not shown) for monitoring the operation state of the optical transceiver from the outside of the lower surface of the box 1 and is formed of, for example, a synthetic resin material and is well known. It is fixed to the display board 5 by the fixing means.

The pivoting portion 20 in the second embodiment is integrally formed upward with projecting pieces 34, 34 integrally formed downward from the lower end portion of the optical fiber storage case 4 and the upper end portion of the display cover 19. The projecting pieces 39, 39 are formed, for example, the projecting pieces 39, 39 formed on the display cover 19 side are formed with cylindrical shafts 39a, 39a facing inward, respectively, and an optical fiber storage case The projecting pieces 34, 34 formed in 4 are formed with through holes 34 a, 34 a at positions facing the cylindrical axis, and the cylindrical axis and the through holes are fitted and pivoted to form an optical fiber. The storage case 4 is pivotally mounted so that it can be opened and closed.

A locking means 41 is formed at the upper end of the optical fiber storage case 4. The locking means 41 is an optical fiber so as to have a substantially U-shaped cross section with a locking portion 41 b in the direction of the display plate 5. It is formed integrally with the storage case 4.
A square hole 40 is formed in the display board 5. When the optical fiber storage case is closed, the locking means 41 is formed of a synthetic resin material integrally with the optical fiber storage case 4. The stop portion 41b is inserted into the square hole 40 while narrowing the interval. When the locking is completed, the locking means 41 is applied with a force to return the claw portion 41a to the original shape by the elastic force, and the locking portion 41b is securely locked in the long hole. Is locked in a closed state on the display board.

As described above, when the mounting structure of the optical fiber storage case 4 according to the present invention is used, in order to improve the speed of storing the optical fiber, the storage portion formed by the minimum necessary members including the guide wall and the fixed portion is used. Even with a simple configuration for storing the optical fiber, the display plate 5 provided in the box 1 can be used as a case cover for the storage case 4 by a simple operation after storing the optical fiber. Even if the case cover is made separately and the case cover is not attached so as to be freely opened and closed by a hinge or the like, the optical fiber can be stably stored.

Further, the optical fiber storage case 4 of the present invention has an optical fiber storage case storage portion that is 90 ° to the opening of the box 1 or a position where it does not overlap with the lid (for example, 120 °). When the construction worker gives priority to improving the visibility in the storage operation of the optical fiber and making it possible to work reliably and easily, the optical fiber storage case 4 storage portion 4a Since the position is below the line of sight and the storage operation can always be performed in a position directly facing the opening of the storage unit, not only can the optical fiber be stored reliably. In this operation, it is not necessary to raise the arm to a high position, so that the construction worker is not burdened in the storage operation.

Note that the present invention is not limited to the above-described embodiment, and the configuration of each part can be appropriately changed and implemented without departing from the spirit of the present invention.

(A) shows an embodiment of the present invention, and is a front view (a lid is not shown) of a trunk amplifier provided with an optical fiber storage case, and (b) is a schematic cross-sectional view along line AA. , (C) is a schematic cross-sectional view along the line BB. (A) is a front view when the optical fiber storage case is opened, and (b) is a schematic cross-sectional view taken along the line C-C (the state in which the lid is opened is indicated by a one-dot chain line, Show relationship). (A) is a top view which shows a state when the optical fiber storage case based on this invention is opened, (b) is a DD sectional schematic sectional drawing. The principal part enlarged view which fractured | ruptured one part which shows the Example of the pivot part of the optical fiber storage case which concerns on this invention is shown. It is a 2nd Example of this invention, and is a perspective view of the state in which the optical fiber storage case was closed. It is a perspective view in the state where the optical fiber storage case in the 2nd example opened. (A) is the elements on larger scale of the pivoting part which concerns on 2nd Example, (b) is a general | schematic fragmentary end elevation of the latching means in 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Box body, 1a ... Heat sink, 1b ... Ramp, 2 ... Connection part, 3 ... Optical cable, 4 ... Optical fiber storage case, 4a ... Optical fiber storage part, 4b ... Notch part, 4c ... Lower end part, 5 ... Display plate, 7 ... optical fiber, 10 ... optical connector, 11 ... amplifier-side optical fiber, 12 ... fusion splicing part, 13 ... fusing part protective sleeve, 14 ... fixing part, 15 ... shaft body, 16 ... stop part, 17 ... Guide wall, 18 ... Joke claw, 19 ... Display cover, 19a ... Pilot lamp, 20 ... Pivoting part, 21 ... Bearing piece, 22 ... Shaft hole, 23 ... Reception piece, 34 ... Projection piece, 34a ... Through hole, 39 ... Projection piece, 39a ... Cylindrical shaft, 40 ... Square hole, 41 ... Locking means, 41a ... Claw part, 41b ... Locking part

Claims (2)

In the mounting structure of the optical fiber storage case, which is installed in the space in the housing to which the optical fiber cable is connected and has a storage portion for storing the extra length of the optical fiber,
One end of the optical fiber storage case is maintained at a pivot portion disposed in the housing so as to have a rotation axis near one end side of the optical fiber storage case so that the optical fiber storage case maintains a predetermined opening / closing amount. When the optical fiber storage case is in a closed state while being pivotally attached to the side, a display for performing a desired display provided in the housing at a position facing the storage portion of the optical fiber storage case A mounting mechanism for an optical fiber storage case, wherein a part or all of the storage portion of the optical fiber storage case can be closed by a plate.
The housing is composed of a box body that is open so that one surface thereof faces in the horizontal direction and has a space inside, and a lid body that opens and closes the box body opening. The box body and the lid body are a box The lower edge of the body and the upper edge of the lid are hinged so as to freely open and close while maintaining a predetermined opening and closing amount.
The optical fiber storage case is pivotally attached to the pivoting portion at the lower edge so as to be openable and closable so as to maintain a predetermined opening and closing amount.
When the optical fiber storage case is in a fully opened state, the optical fiber storage case is opened to be smaller than 90 ° to 180 ° with respect to a plane formed by the open end of the space. The optical fiber storage case mounting mechanism according to claim 1, wherein the optical fiber storage case mounting mechanism is configured to open by a predetermined angle within a range of angles that do not overlap with each other.

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