JPH0497105A - Optical cable excessive-length processing structure - Google Patents

Abstract

PURPOSE:To improve the operability of an excessive-length process by mounting a case between electronic units and inserting a reel into the case, seating the reel on a leaf spring while a hollow hole is fitted loosely onto a discoid projection, and winding the excessive-length part of an optical cable which is led in from the rear part of the case. CONSTITUTION:The case 40 is mounted between the electronic units which are stacked on a rack. Further, the reel 30 is supported on a shelf type guide 41 at lower parts of both right and left sides, inserted into the case 40, and seated on the leaf spring 42 while the hollow hole 32 is fitted loosely onto the discoid projection 43. Then the excessive length part 10 of the optical cable 9 which is led in the case 40 from the rear part of the case 40 is wound. In this case, the reel 30 is used to wind the excessive length part 10 of the optical cable 9 in its spiral groove 31 while the cable is led out of the case 40, so there is not the influence of the size of a space where the excessive length is stored.

Description

[Detailed Description of the Invention] [Summary] The purpose of this invention is to provide a structure for processing excess length of an optical cable that occurs near the connection portion of an optical cable, and which has good workability in processing the excess length. A reel having a spiral groove formed on the outer circumferential surface of the main body to wind the extra length, and an L-shaped wire shaping plate disposed on the outer circumference of the main body so that the vertical plate portion is close to the outer circumferential surface, and left and right side plates, respectively. multiple shelf-shaped guides arranged horizontally opposite each other, and a cantilever-shaped guide arranged in the center of each horizontally opposed shelf-shaped guide, the rear end of which is fixed to the bottom member of the case. a box-shaped case with an open front having a spring plate and a disk-shaped protrusion formed on the upper surface of the central part of the spring plate;
The case is installed between electronic units stacked on a rack, and the reel is mounted inside the case with the lower portions of the left and right sides supported by the shelf-shaped guides. The optical cable is inserted and sits on the spring plate with the hollow hole loosely fitting into the disc-shaped protrusion, and the remaining length of the optical cable that is drawn into the case from the rear of the case is wound. do.

[Industrial application field]

TECHNICAL FIELD The present invention relates to a structure for handling excess length of an optical cable that occurs near a connecting portion of the optical cable.

FIG. 3 is a sectional view of an electronic device using an optical cable as an external signal line.

In Fig. 3, 1 is a rack for electronic equipment that uses optical cables 9 for external signal lines, and 5 is a box-shaped shelf with a bang board at the bottom and an open front, and a large number of This is an electronic unit in which printed boards 6 are arranged.

The electronic unit lift 5 is inserted onto the shelf support plate 2 of the rack 1, and is attached to the rack L by fixing fixing plates (not shown) provided on the left and right sides of the front side with screws to the front rack pillars (not shown). It is installed in multiple stages.

In the electronic unit 5 mounted on the rack 1 in this manner, the printed board 6 is inserted into the shelf from the front side of the rack 1, and the printed board connector is plugged into the backboard connector.

Furthermore, a support plate 3 is attached to the rack 1 above each electronic unit 5.

Electric wire cables, which are electrical signal lines, are drawn into the rack 1 from the ceiling side, descend behind the stacked electronic units 5, and connect cable connectors to connectors mounted on the back of the backboards of each electronic unit 5. By plugging in, it is connected to the printed board 6.

On the other hand, the terminal has an optical connector (e.g. plug-side optical connector)
The optical cable 9 with the optical cable 8 attached to it is drawn into the rack 1 from the ceiling side, descends behind the stacked electronic unit 5, passes over each support plate 3, and is pulled out to the front of the electronic unit 5. A light emitting element is mounted on a printed board 6 by plugging an optical connector 8 into a jack-side optical connector 7 mounted on the front edge of the printed board 6.

Alternatively, it is connected to a light receiving element.

At this time, if an optical connector is easily attached to a terminal of an optical cable, connection loss will greatly increase.

Therefore, when using an optical cable as a signal line, an optical cable that is sufficiently long than the length required for wiring is prepared in advance, and an optical connector is attached to its terminal at the factory.

For this reason, when the optical cable is wired, an extra length of the optical cable is generated at the connecting portion of the device to be connected.

On the other hand, when an optical cable is bent at an acute angle and wired, bending loss occurs. Therefore, it is necessary to maintain the extra length as an arc larger than a predetermined radius.

[Conventional technology]

FIG. 4 is a diagram showing a conventional optical cable surplus length processing structure, in which (a) is a perspective view and (b) is a sectional view of key points.

In FIG. 4, conventional optical cable surplus length processing is performed on a support plate 3 provided between electronic units.

That is, several (for example, four) saddles 20 made of synthetic resin are disposed on the upper surface of the support plate 3 so as to be positioned on the circumference or on the ellipse.

The saddle 20 is composed of a saddle body 21 that is approximately U-shaped when viewed from the front, and an umbrella-shaped protrusion 22 protruding from the bottom of the saddle body 21. The saddle 20 is supported by pushing the umbrella-shaped protrusion 22 into a hole in the holder support plate 3 It is planted on board 3.

The optical cable 9 drawn in from the rear of the support plate 3 is inserted into the holding part 24 of the saddle body 21 through the upper opening 23 of each saddle 20 by inserting its extra length 10 into a circular or oval shape between the plurality of saddles 20. The rack is passed to the support plate 3, and after being wound several times in the shape of a ring to remove the excess length.
The optical connector 8 is inserted into the jack-side optical connector of the electronic unit.

(Problem to be Solved by the Invention) However, with the above-mentioned conventional surplus length processing structure, it is necessary to insert one's hand into a narrow space above the holder support plate and pass the surplus length to each saddle. There was a problem in that the workability of processing extra length was poor.

In addition, since multiple optical cables are mixed and inserted into the same saddle and the excess length is processed, there is a problem that all the optical cables must be removed from the saddle in order to remove the selected one optical cable. there were.

The present invention was created in view of these points, and an object of the present invention is to provide an optical cable surplus length processing structure with good workability in processing surplus length.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a loop 3 for winding the extra length 10 of the optical cable 9, as illustrated in FIG.
0, and a case 40 in which reels 30 are mounted in multiple stages.

The reel 30 has a spiral groove 31 formed on the outer circumferential surface of the main body for winding the extra length 10 of the optical cable 9, and an L-shaped wire shaping plate 35 arranged on the outer circumferential surface of the main body so that the vertical plate portion is close to the outer circumferential surface. It is set up.

The case 40 installed between the electronic units stacked on the rack is box-shaped with an open front, and has a plurality of shelf-shaped guides 41 disposed horizontally opposite to each other on the left and right side plates of the case 40. In addition, by fixing the rear end to the bottom member of the case,
A cantilever-shaped spring plate 42 is provided at the center of each horizontally opposing shelf-shaped guide 41.

Also, on the upper surface of the center part of each spring plate 42,
It has a disc-shaped projection 43.

The reel 30 is inserted into the case 40 with the remaining length 10 of the optical cable 9 drawn into the case 40 from the rear of the case 40 being wound, and the lower portions of the left and right sides supported by the shelf-shaped guides 41. The hollow hole is seated on the spring plate 42 with the disk-shaped protrusion 43 loosely fitted therein.

1 Effect] Since the reel 30 according to the present invention is for winding the extra length 10 of the optical cable 9 around the spiral groove 31 while being pulled out from the case 40, the space in which the extra length is finally accommodated is It is equally unaffected by size.

In addition, since one optical cable 9 is wound around each of the optical cables 30, the selected optical cable 9 can be wound and other optical cables 9 can be connected by simply pulling out the optical cable 9 from the case 40. There is no need to perform the same operations.

That is, the optical cable surplus length processing structure of the present invention has good workability in surplus length processing.

[Example] The present invention will be specifically described below with reference to the drawings. Note that the same reference numerals indicate the same objects throughout the figures.

FIG. 1 is a perspective view of an embodiment of the invention, and FIG. 2 is a sectional view of the embodiment of the invention.

In FIG. 1, 30 has a hollow hole 32 in the axis, and a semicircular spiral groove 31 with a radius larger than the wire radius of the optical cable 9 (for example, 1.5++++++) is provided on the outer peripheral surface.
This reel is made of synthetic resin.

The outer diameter of the reel 30 is approximately 70Φ, and its height is approximately 2
It is 0 m.

Reference numeral 35 denotes an elastic L-shaped wire straightening plate disposed on the outer circumferential portion of the reel 30 so that the inner surface of the vertical plate portion is close to the outer circumferential surface of the main body.

The L-shaped wire shaping plate 35 consists of a vertical plate part whose upper part is flexible to the outside and a horizontal plate part fixed to the bottom surface of the reel 30. The gap between the outer peripheral surface and the outer peripheral surface is approximately 0.5 m.

Since the L-shaped wire straightening plate 35 is provided in this manner and the vertical plate portion is brought into contact with the outer surface of the extra length 10 wound around the spiral groove 31, the optical cable 9 is prevented from falling off from the spiral groove 31. Ru.

40 is a case made of a box-shaped metal plate with a cable inlet 44 in the bottom plate of the case and an opening at the front, and has a depth of about 100 m, a height of about 80 m, and a width of about 7 m.
There are 5 cabinets.

horizontally facing each of the left and right side plates of the case 40,
A plurality of stages (three stages in the embodiment) of shelf-shaped guides 4L are provided.

Reference numeral 42 denotes a spring plate 42 made of an elastic metal plate (for example, stainless steel) and having a width of about 25 cm, and a disk-shaped projection 43 is provided on the upper surface of the center portion of the spring plate 42.

The diameter of this disc-shaped lug 8 is smaller than the inner diameter of the hollow hole 32 of the reel 30.

The spring plate 42 has a cantilever shape with its rear end fixed to the bottom member of the case, and is disposed at the center of each of the horizontally opposing shelf-shaped guides 41.

On the other hand, as shown in FIG. 2, electronic units 5 housing a large number of printed circuit boards 6 are mounted in multiple stages on an electronic equipment rack 1 that uses an optical cable 9 as an external signal line.

Each printed board 6 is inserted into the shelf of the electronic unit 5 from the front side of the rack 1, and the printed board connector is plugged into the backboard connector.

Then, the electric wire cable, which is an electric signal line, is drawn into the rack 1 from the ceiling side, descends behind the stacked electronic units 5, and is attached to a lid mounted on the back of the backboard of each electronic unit 5. By plugging in the connector, it is connected to the printed board 6.

On the other hand, a support plate 3 is attached above each electronic unit 5, and a case 40 is placed on this support plate 3.

The optical cable 9 with the optical connector (plug-side optical connector) 8 attached to the terminal is drawn into the rack 1 from the ceiling side along with the electric wire cable, descends behind the stacked electronic unit 5, and passes through the cable inlet 44 to the case 40. As shown in FIG.

Note that although the illustration shows that the reel 30 is wound from above the spiral groove 31, in reality, it is easier to wind the reel 30 if the reel 30 is wound from below the spiral groove 31 sequentially upward.

After winding the reel 30 with the extra length 10, push down the front end of the spring plate 42 by hand, place both sides of the bottom of the reel 30 on the shelf-shaped guide 41, insert it into the case 40, and insert it into the case 40. Release the hand pressing the spring plate 42 while pushing it all the way in.

As a result, the spring plate 42 returns to its original position, and the disc-shaped projection 43 loosely fits into the hollow hole 32 of the reel 30.

That is, since the reel 30 is supported by the shelf-shaped guide 41 and is seated on the spring plate 42 at the same time, there is no risk of it being pulled out from the case 40 even if there is vibration or the like.

The optical cable 9 whose extra length has been processed by the reel 30 is pulled out on the optical connector 8 side to the front of the case 40, and is inserted into the jack-side optical connector of the electronic unit.

Note that, after the reel 30 is seated on the spring plate 42, when the optical connector 8 side is pulled while rotating the reel 30, the slack in the optical cable 9 that has occurred at the rear of the case 40 is removed.

〔Effect of the invention〕

As explained above, the present invention allows the surplus length of the optical cable to be wound on a reel, so that the surplus length can be processed without being equally affected by the size of the space in which the surplus length is finally accommodated. It can be carried out, and the workability of surplus length processing is good.

Furthermore, since one optical cable is wound around each reel, it is easy to take out the selected optical cable.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a sectional view of an embodiment of the invention, Fig. 3 is a sectional view of an electronic device, and Fig. 4 is a diagram showing a conventional optical cable surplus length processing structure. (a) is a perspective view, and (b) is a sectional view of key points. In the figure, 1 is a rack, 3 is a support plate, 5 is an electronic unit, 6 is a printed board, 8 is an optical connector,
9 is an optical cable, 10 is an extra length, 20 is a saddle, 30 is a reel, 31 is a spiral groove, 32 is a hollow hole, 35 is an L-shaped wire plate, 40 is a case,
41 is a shelf-shaped guide, 42 is a spring plate,
Reference numeral 43 indicates a disc-shaped projection, and reference numeral 44 indicates a cable introduction port. Figure 1: Exterior view of the 7th and 9th examples Figure 1: Open view of the unexploded August execution platform Figure 2

Claims (1)

[Claims] A spiral groove (31) formed on the outer circumferential surface of the main body for winding the extra length (10) of the optical cable (9), and a vertical plate portion arranged on the outer circumference of the main body so as to be close to the outer circumferential surface. L-shaped wire board (3
5), and a plurality of shelf-shaped guides (41) disposed horizontally opposite each other on the left and right side plates.
), a cantilever-shaped spring plate (42) disposed in the center of each of the horizontally opposing shelf-shaped guides (41), and whose rear end is fixed to the bottom member of the case, and the spring plate (42). ), the box-shaped case (40) is open at the front and has a disk-shaped projection (43) formed on the upper surface of the central part of the case (40), and the case (40) is mounted on a rack. Superimposed electronic unit (5
), and the reel (30) is inserted into the case (40) with the lower portions of both left and right sides supported by the shelf-shaped guide (41), and the hollow hole (32) is inserted into the case (40). The case (40) is seated on the spring plate (42) while loosely fitting into the disc-shaped projection (43).
1. An optical cable surplus length processing structure, characterized in that the surplus length (10) of an optical cable (9) drawn into the case (40) from the rear part of the optical cable is wound.