JP4002168B2 - Track termination tray unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a line termination tray unit used for an optical cable main distribution board.
[0002]
[Prior art]
The optical cable main wiring board connects the optical fiber core of the optical cable drawn into the station from the outside and the optical cord on the in-station device side in a switchable manner. A specific example is shown in FIG. Reference numeral 10 denotes a track termination tray unit, 12 denotes a station unit side tray unit, 14 denotes a center code tray, and 16 denotes a cabinet for housing these.
[0003]
The line termination tray unit 10 accommodates a portion where an optical fiber core wire of an optical cable drawn from outside is terminated by a connector. The in-office device side tray unit 12 accommodates a portion of the in-office device side optical cord terminated with a connector. The center cord tray 14 supports an intermediate portion of a jumper cord with connectors at both ends for connecting the connector in the track termination tray unit 10 and the connector in the in-office apparatus side tray unit 12.
[0004]
As shown in FIG. 8, the conventional track termination tray unit 10 includes trays 18 stacked in multiple stages, a frame body 20 that supports the individual trays 18 so as to be able to be pulled out and pushed, and the upper surface and both sides of the frame body 20. A stopper 22 is formed so as to straddle the surface and is attached to the frame 20 so as to be movable up and down. The tray 18 has a structure as shown in FIGS. 9A to 9D, and the frame 20 has a box shape as shown in FIG. As shown in FIG. 11, the stopper 22 has a gate shape including a top plate portion 23 and both side walls 24, and has a structure in which comb teeth 26 protrude inward from the both side walls 24. Further, as shown in FIGS. 8 and 12A, elongated holes 28 are formed on both side walls 24 of the stopper 22 in the vertical direction. The stopper 22 is formed by a pin 30 penetrating the elongated hole 28 to form a frame 20. Is attached to be movable up and down. The stopper 22 is in its lowered position under its own weight unless a lifting force is applied.
[0005]
On the other hand, in the vicinity of the rear end of the tray 18, as shown in FIG. 12B, a forward stepped portion 34 is formed on the upper edge of the side frames 32. When the tray 18 is pulled out to the working position, the forward stepped portion 34 hits the comb teeth 26 of the stopper 22 and the tray 18 can no longer be pulled out. While the tray 18 is pulled out, operations such as connector switching are performed on the tray 18, but locking members 36 are attached to both sides of the tray 18 to prevent the tray 18 from being pushed in during the operation. It has been. When working on the tray 18, the work is started after the locking member 36 is raised with fingers. In this way, the tray 18 cannot be pulled out or pushed in, so that the work can be performed in a stable state. When the work is completed, the locking member 36 is tilted with fingers and the tray 18 is pushed into the storage position.
[0006]
FIG. 13 shows a conventional line termination tray unit different from the above. The track termination tray unit 10 prevents the tray 18 from being pushed in by passing the push-in preventing bar 38 as shown in FIG. 14 through the tray 18 drawn to the working position. Since other configurations are the same as those of the line termination tray unit shown in FIGS. 8 to 12, the same portions are denoted by the same reference numerals.
[0007]
[Problems to be solved by the invention]
The conventional track termination tray unit is troublesome because it requires an operation of raising a locking member or inserting a bar in order to prevent the tray pulled out to the working position from being pushed in. In the case of the locking member, it is necessary to assemble the locking member to the tray at the time of assembly, which increases the number of parts and the assembly is troublesome. In the case of a bar, when the work on the tray is finished and the tray is pushed into the storage position, it is necessary to pull out the bar and store it in another place, which is troublesome.
[0008]
In view of the above problems, an object of the present invention is to provide a line termination tray unit that does not require a locking member or a bar to prevent the tray pulled out to the working position.
[0009]
[Means for Solving the Problems]
In order to achieve this object, the present invention comprises a plurality of trays, a frame body that supports these trays so that they can be pulled out and pushed individually, and is formed so as to straddle the upper surface and both side surfaces of the frame body. A stopper mounted so as to be movable up and down, and the stopper is in a lowered position under its own weight unless a lifting force is applied, and when the tray is pulled from the storage position to the working position, An optical fiber core of the optical cable is formed by a connector so that the forward stepped portion formed at the edge abuts against the comb teeth formed inward on both side walls of the stopper so that the tray cannot be pulled out any further. In the line termination tray unit for accommodating the end portion ,
On the upper edge of the both side frames of the tray, a rearward stepped portion is formed so as to face the forward stepped portion, and a slope whose height gradually decreases from the top of the rearward stepped portion toward the front end side of the tray. When the tray is pulled out from the stowed position to the working position, the stopper is pushed up by the slope as the tray is pulled out, and when the tray is pulled out to the working position, the comb teeth of the stopper are between the forward stepped portion and the backward stepped portion. It is characterized by being depressed .
[0010]
In the track termination tray unit of the present invention, a lever is installed between the upper surface of the frame body and the top plate portion of the stopper, and the lever sinks into a part of the upper surface below the top plate portion. It has an inclined surface to lift, and the lever is moved up and down by reciprocating between the position where the inclined surface does not sink under the top plate part and the position where it sinks. Preferably there is.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 shows an embodiment of the present invention. FIGS. 1A and 1B are enlarged views of main parts corresponding to FIGS. 12A and 12B described above. When this line termination tray unit 10 also pulls out the tray 18 from the storage position to the working position, the forward stepped portion 34 formed on the upper edge of the both side frames 32 of the tray 18 hits the comb teeth 26 of the stopper 22, This is the same as the conventional one in that the tray 18 can no longer be pulled out.
[0013]
The feature of the line termination tray unit 10 is that a rearward stepped portion 40 is formed on the upper edges of the side frames 32 of the tray 18 so as to face the forward stepped portion 34, and from the top of the rearward stepped portion 40. That is, a slope 42 whose height gradually decreases toward the front end side of the tray 18 is formed.
[0014]
With such a configuration, when the tray 18 is pulled out from the storage position to the working position, the stopper 22 is pushed up by the slope 42 as the tray 18 is pulled out, and when the tray 18 is pulled out to the working position, the comb of the stopper 22 is pulled out. The teeth 26 fall between the forward stepped portion 34 and the rearward stepped portion 40 (the stopper 22 is lowered). Therefore, the tray 18 cannot be pulled out any more. After that, when a pushing force is applied to the tray 18, the backward-facing stepped portion 40 abuts against the comb teeth 26 of the stopper 22, so that the tray 18 is not pushed in.
[0015]
Thus, since the tray 18 pulled out to the work position cannot be pulled out or pushed in, the work can be performed stably. When the tray 18 is pushed in after the work is finished, if the stopper 22 is lifted, the comb teeth 26 come out from between the forward stepped portion 34 and the rearward stepped portion 40, so that pushing can be performed. The stopper 22 pushes down the tray 18 a little and then lowers by its own weight when released, so that the tray 18 can be pushed into the storage position as it is.
[0016]
In the drawing, the case where the slope 42 is linearly formed so as to gradually decrease in height is shown, but the slope 42 is formed in a curved line since it is sufficient that the height gradually decreases. Also good.
[0017]
2 to 6 show another embodiment of the present invention. In this embodiment, the stopper 22 can be easily lifted (released). 2 to 6, the same parts as those in FIGS. 1 and 7 to 14 described above are denoted by the same reference numerals, and redundant description will be omitted. Although the illustration of the tray is omitted in FIGS. 2 and 3, the tray has the same structure as FIG.
[0018]
In this track termination tray unit, a lever 46 that is rotatable about a fulcrum 44 on the frame 20 is provided between the upper surface of the frame 20 and the top plate portion 23 of the stopper 22. As shown in FIG. 5, the lever 46 has a substantially cross shape, and is provided with an inclined surface 48 on the upper surface of the tip of the wings 46a and 46b. As shown in FIG. 2, the lever 46 has both wings 46 a and 46 b positioned below the top plate 23 of the stopper 22, a base 46 c supported by the fulcrum 44, and a tip 46 d protruding from the front surface of the frame body 20. As shown, it is installed on the upper surface of the frame body 20. The top plate portion 23 of the stopper 22 is formed with an opening 50 into which the inclined surface 48 of the lever 46 enters when the lever 46 is in the position of FIG. When the lever 46 is rotated counterclockwise from the state of FIG. 2A, the inclined surface 48 enters under the top plate portion 23 as shown in FIG. 3, so that the stopper 22 is lifted.
[0019]
The lever 46 is always attracted by the tension spring 52 and hits the first positioning member 54 and is in the position shown in FIG. 2 unless an external force is applied. The state shown in FIG. 2 is a state where the stopper 22 is lowered by its own weight, that is, a state where the stopper is operated as shown in FIG. When the work on the drawn tray 18 is finished and the tray 18 is pushed in, the lever 46 is rotated counterclockwise from the position shown in FIG. 2 until it hits the second positioning member 56. Then, since the inclined surface 48 enters under the top plate portion 23 of the stopper, the stopper 22 is lifted. As a result, the comb teeth 26 shown in FIG. 1 come out from between the forward stepped portion 34 and the backward stepped portion 40 (the stopper is released), and the tray 18 can be pushed in. When the lever 46 is released after the tray 18 is pushed in a little, the lever 46 is attracted by the tension spring 52 and returns to the position shown in FIG. Therefore, if the tray 18 is pushed in as it is, the stopper 22 descends by its own weight and returns to the stopper operating position.
[0020]
As described above, according to this embodiment, by rotating the lever 46, the stopper 22 at the operating position (lowering position) can be easily lifted to the releasing position (upward position). It can be done easily and efficiently.
[0021]
In the drawings, the inclined surface 48 is a plane that gradually increases in height from the upper surface of the lever 46, but the inclined surface 48 may be a curved surface that gradually increases in height from the upper surface of the lever 46. Good.
[0022]
【The invention's effect】
As described above, according to the present invention, the tray pulled out to the working position can be prevented from being pushed in without using a locking member or bar for preventing pushing-in and without performing an operation for preventing pushing-in. be able to. Further, by providing a lever having an inclined surface for lifting the stopper, the stopper can be released easily and efficiently.
[Brief description of the drawings]
1A and 1B show an embodiment of a track termination tray unit according to the present invention, in which FIG. 1A is a side view of the main part, and FIG. 1B is an enlarged side view of the main part.
FIGS. 2A and 2B show a state where the stopper is in the operating position in another embodiment of the line termination tray unit according to the present invention, FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. Side view.
3 shows a state of the track termination tray unit of FIG. 2 when the stopper is released, (A) is a plan view, (B) is a front view, and (C) is a side view. FIG.
4A and 4B show a frame used in the track termination tray unit of FIG. 2, in which FIG. 4A is a plan view, FIG. 4B is a front view, and FIG.
5A and 5B show levers used in the line termination tray unit of FIG. 2, wherein FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. 5C is a side view.
6A and 6B show stoppers used in the line termination tray unit of FIG. 2, in which FIG. 6A is a plan view, FIG. 6B is a front view, and FIG.
7A is a front view showing an optical cable main wiring board equipped with a track termination tray unit, FIG. 7A is a front view showing the door opened, and FIG. 7B is a front view showing the door closed.
FIG. 8 is a side view showing an example of a conventional track termination tray unit.
9A and 9B show a tray of the line termination tray unit of FIG. 8, in which FIG. 9A is a plan view, FIG. 9B is a front view, FIG. 9C is a right side view, and FIG.
10 is a front view showing a frame body of the line termination tray unit of FIG. 8. FIG.
FIG. 11 is a front view showing a stopper of the line termination tray unit of FIG. 8;
FIGS. 12A and 12B show a main part of the line termination tray unit of FIG. 8, in which FIG. 12A is a side view and FIG.
FIG. 13 is a side view showing another example of a conventional track termination tray unit.
14A and 14B show a push-in prevention bar used in the track termination tray unit of FIG. 13, in which FIG. 14A is a front view, and FIG.
[Explanation of symbols]
10: Track termination tray unit
18: Tray
20: Frame
22: Stopper
26: comb teeth
28: Slotted hole
34: Forward step
40: Back facing step
42: Slope
46: Lever
48: Inclined surface
50: Opening
52: Tension spring

Claims (2)

A plurality of trays, a frame that supports these trays so that they can be pulled out and pushed individually, and a stopper that is formed so as to straddle the upper surface and both side surfaces of the frame and is attached to the frame so as to be movable up and down. Provided, the stopper is in a lowered position under its own weight unless a lifting force is applied, and when the tray is pulled out from the storage position to the working position, a forward-facing stepped portion formed on the upper edges of both side frames of the tray is A line structure for accommodating a portion where the optical fiber core of the optical cable is terminated with a connector, so that the tray cannot be pulled out any more by striking against the comb teeth formed inward on both side walls of the stopper. In the end tray unit,
On the upper edge of the both side frames of the tray, a rearward stepped portion is formed so as to face the forward stepped portion, and a slope whose height gradually decreases from the top of the rearward stepped portion toward the front end side of the tray. When the tray is pulled out from the stowed position to the working position, the stopper is pushed up by the slope as the tray is pulled out, and when the tray is pulled out to the working position, the comb teeth of the stopper are between the forward stepped portion and the backward stepped portion. A track termination tray unit, characterized in that it is depressed .   The track termination tray unit according to claim 1, wherein a lever is installed between the upper surface of the frame and the top plate portion of the stopper, and the lever sinks into a part of the upper surface below the top plate portion. The lever has an inclined surface for lifting the stopper, and the lever is moved up and down by reciprocating between the position where the inclined surface does not sink under the top plate part and the position where the lever sinks. A track termination tray unit, characterized in that

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