JP2007206124A - Drip-proof type cable connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drip-proof type cable connection box that is suitable for housing many small-diameter optical fiber cables, such as drop cables and jumper cables, that has high waterproofness for each drop cable so as to be able to shut off waterdrops propagating from each drop cable, and that facilitates drop cable housing operation. <P>SOLUTION: The connection box body 1 is provided with, in the gravity direction (lower) part on both sides, cable introducing sections 1b through which cables are introduced from the outside into the connection box body 1. When a cover 2 is closed on the connection box body 1, nearly triangular waterproofing spaces 4 isolated from the inner part of the connection box body 1 is formed near respective cable inlet sections 1b, through cooperation of the cover 2 and the connection box body 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drip-proof cable connection box used for a connection portion of an optical fiber cable.

  FIG. 9 is a side view showing an example of a conventional drip-proof cable connection box 101 for an optical fiber cable. The connection portion of the optical fiber cable 110 is accommodated in the drip-proof cable connection box 101. As shown in FIG. 9, the drip-proof cable connection box 101 includes a connection box main body 102 having an opening 102a on the front surface (right side in the figure) and a lid 103 for closing the opening 102a. Yes. The connection box body 102 is attached to the messenger wire 105 via an L-shaped hanging metal fitting 104 fixed to the back surface of the connection box body 102. The hanging metal fitting 104 is formed in an L shape, and the messenger wire 105 is sandwiched in cooperation with the clamp plate 106 at the upper portion, and the clamp plate 106 is fastened to the hanging metal fitting 104 by a bolt 107, whereby the messenger wire. 105 is fixed.

  A gasket 108 made of rubber or elastomer is disposed around the opening 102a of the connection box main body 102. When the lid 103 is fixed to the connection box main body 102 with the bolt 109, the gasket 108 is crushed. A drip-proof (waterproof) action can be obtained by tightening the bolts strongly.

  Further, in Patent Document 1, a lid attached with a gasket is coupled to a junction box body by a hinge to seal the inside of the junction box body and tilt the upper wall of the junction box body. A drip-proof cable connection box with improved drip-proof (waterproof) effect is described.

  Further, Patent Document 2 describes a drip-proof cable connection box (branch cable connection portion closure) having a waterproof area in the connection box body.

JP 2001-57734 A JP 2004-054148 A

  The structure of the above-described conventional drip-proof cable connection box is used for branch connection of the main cable, and is not suitable for storing a large number of small-diameter optical fiber cables such as drop cables and jumper cables. .

  Also, when dropping the drop cable to the subscriber's home, the connection box is opened and closed to connect the drop cable and the splitter branch core wire in the connection box. In order to block the transmitted water droplets, a connection box having high waterproof performance for each drop cable and easy and easy drop cable storage work has been demanded.

  The present invention has been made in order to eliminate the above-described drawbacks of the prior art, and is suitable for accommodating a large number of small-diameter optical fiber cables such as drop cables and jumper cables, and for each drop cable. It is an object of the present invention to provide a drip-proof cable connection box that has a high waterproof performance and can block water drops transmitted from each drop cable, and that makes the drop cable storage work simple and easy.

  The drip-proof cable connection box according to the present invention has any one of the following configurations.

[Configuration 1]
A drip-proof cable connection box comprising a connection box body whose front side is open and a lid body that covers the front side of the connection box body so as to be openable and closable. One cable has a cable introduction part that is introduced into the junction box body from the outside of the junction box body, and when the lid body is closed with respect to the junction box body, in the vicinity of each cable introduction part Is characterized in that the lid and the junction box main body work together to form a waterproof space isolated from the inner part of the junction box main body.

  By having this configuration, the waterproof space has a draining structure, and water droplets transmitted through the cable are blocked in the waterproof space.

[Configuration 2]
In the drip-proof cable connection box having the configuration 1, the waterproof space is formed in the gravity direction portions on both sides to be the cable introduction portion of the connection box body, and on the lower edge portion from the side portion of the connection box body in the connection box body. A cable holding plate formed across the two sides of the lower edge of the junction box body, gravity-direction portions on both sides of the lid corresponding thereto, and a lower edge of the lid from the side of the lid A cable gripping portion is formed by a plurality of cable gripping pieces for gripping at least one cable. In addition, the cable holding plate is formed with at least one recess for inserting the cable.

  By having this structure, the cable holding part which consists of a several cable holding piece stops the momentum of the immersion by the water droplet which propagates a cable. Even when there is a water droplet that has passed through the cable gripping portion, the water droplet is blocked in the waterproof space.

[Configuration 3]
In the drip-proof cable connection box having Configuration 2, when a plurality of cable gripping portions are formed, the length of the upper cable gripping portion gripping the cable is shorter than the lower cable gripping portion. In at least the uppermost cable gripping portion, a shutter plate made of a flexible material that closes the inner end of the cable gripping portion is provided inside the cable gripping portion. .

  By having this structure, the shutter plate made of a flexible material stops the momentum of water immersion caused by water droplets traveling through the cable. Even when there is a water droplet that has passed through the cable gripping portion, the water droplet is blocked in the waterproof space.

[Configuration 4]
In the drip-proof cable connection box having the configuration 2 or the configuration 3, the connection box body is provided with a plurality of cable pressing fins at a position on the outer side of the cable introduction portion. Is characterized in that the tip side is formed in a hook shape, the cable being held by the cable holding portion is sandwiched, and the cable is held by the hook-like tip side portion.

  With this configuration, the cable pressing fin holds the cable and holds the cable with the hook-shaped tip side portion, so that the cable does not fall off.

[Configuration 5]
In the drip-proof cable connection box having any one of Configurations 2 to 4, the waterproof space is configured in a substantially triangular shape.

  By having this configuration, the waterproof space can be configured in a space-efficient manner in the drip-proof cable connection box.

  In the drip-proof cable junction box according to the present invention having [Configuration 1], when the lid is closed with respect to the junction box body, the lid and the junction box body work together to Since a substantially triangular waterproof space isolated from the side portion is formed, the waterproof space has a draining structure, and water droplets transmitted through the cable are blocked in the waterproof space.

  Therefore, in the drip-proof cable connection box according to the present invention, it is not necessary to use a separate waterproof packing unlike the conventional drip-proof cable connection box. (Waterproof) effect can be obtained.

  In the drip-proof cable connection box according to the present invention having [Configuration 2], the cable gripping portion made up of a plurality of cable gripping pieces stopped the momentum of water immersion due to water droplets traveling through the cable and passed through the cable gripping portion. Even when there is a water droplet, the water droplet is blocked in the waterproof space.

  In the drip-proof cable connection box according to the present invention having [Configuration 3], the shutter plate made of a flexible material stops the momentum of water immersion caused by water droplets traveling through the cable, and the water droplets that have passed through the cable gripping portion If there is, this water droplet is blocked in the waterproof space.

  In the drip-proof cable connection box according to the present invention having [Configuration 4], the cable pressing fins hold the cable and hold the cable by the hook-shaped tip side portion, so that the cable does not fall off.

  In the drip-proof cable connection box according to the present invention having [Configuration 5], the waterproof space is configured in a substantially triangular shape, so that the waterproof space is configured in a space-efficient manner in the drip-proof cable connection box. Can do.

  In other words, the present invention is suitable for storing a large number of small-diameter optical fiber cables such as drop cables and jumper cables, and has a high waterproof performance for each drop cable, so that water drops transmitted from each drop cable can be prevented. In addition, it is possible to provide a drip-proof cable connection box that can be shut off and that facilitates the drop cable storage operation.

  The drip-proof cable connection box according to the present invention can be applied to optical fiber cables currently on the market and all optical wiring components.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing a partially broken structure of a drip-proof cable connection box according to an embodiment of the present invention. Hereinafter, in the present invention, in FIG. 1, the paper surface direction may be referred to as the work surface side or front surface side, the back side of the drawing in FIG. .

  As shown in FIG. 1, this drip-proof cable connection box is provided with a drip-proof type including a connection box main body 1 whose front side is open and a lid 2 that covers the front side of the connection box main body 1 so as to be openable and closable. It is a cable connection box. The connection box main body 1 is attached to, for example, a messenger wire stretched over the space by an L-shaped hanging bracket (not shown) fixed to the back surface of the connection box main body 1.

  The lid 2 is attached via a hinge 3 at the bottom of the junction box body 1 so as to be opened and closed in the vertical direction as indicated by an arrow A in FIG. The lid 2 is formed along the outer periphery of the lid surface 2a facing the front side of the junction box body 1 and covers both sides, the upper edge, and the lower edge of the junction box body 1. And a peripheral wall 2b.

  FIG. 2 is a perspective view showing a configuration of a junction box body of the drip-proof cable junction box.

  As shown in FIG. 2, a rib 1a protruding from the outer peripheral surface is formed on the outer periphery in the vicinity of the opened front side edge of the junction box body 1. In the connection box main body 1, at least one optical fiber cable (hereinafter sometimes referred to as “cable”) 201 is connected to the portion in the direction of gravity (downward) in a state where the connection box body 1 is suspended from the overhead wires on both sides. Cable introduction portions 1b and 1b are introduced into the connection box body 1 from the outside of the box body. The optical fiber cable 201 introduced into the connection box body 1 is connected to the other cable 201 in the connection box body 1 or branched.

  A plurality of plastic optical fiber storage cases 3a (hereinafter referred to as storage cases) are stacked on the bottom of the main body.

  Each storage case is hollow and has a thin plate shape, and the upper lid can be opened and closed, so that wiring operations such as taking out optical fibers from the storage case and placing optical fibers in the storage case can be performed. Yes.

  Each storage case end is hinged and can be rotated up and down independently for each storage case, and each storage case is layered so as to gradually shift in the vertical direction so that it can be easily operated. (FIG. 1).

  The lowermost storage case is a splitter storage case in which the splitter is stored, and a single optical fiber branched from the splitter is stored in each upper storage case.

  With the above configuration, in order to connect the optical fiber introduced from the outside to the optical fiber of the storage case to be worked, first, after rotating all the storage cases on the upper side of the target storage case, Open the lid and take out the target optical fiber. And it connects with the optical fiber accommodated by fusion | fusion, connector connection, etc., and the other optical fiber introduce | transduced from the outside. Thereafter, the branch connection work is completed by placing the cover in the storage case again together with the connection extra length and closing the cover.

  In this drip-proof cable connection box, when the cover 2 is closed with respect to the connection box main body 1, as shown in FIG. 1, the cover 2 and the connection are located in the vicinity of the cable introduction portions 1 b and 1 b. The box body 1 cooperates to form waterproof spaces 4 and 4 that are isolated from the inner portion of the connection box body 1. The waterproof spaces 4 and 4 have a draining structure, and water droplets transmitted through the cables introduced into the junction box body 1 from the cable introduction portions 1b and 1b are blocked in the waterproof spaces 4 and 4, respectively. The shape of the waterproof spaces 4 and 4 is preferably substantially triangular from the viewpoint of space efficiency. Here, the term “cooperating” means that when the lid 2 is closed, a partitioned space is formed by matching the positions of the tip of the partition wall 6 formed on the lid 2 and the tip of the cable holding plate 5. It means that.

  FIG. 3 is a perspective view showing a configuration of the drip-proof cable connection box (a front side in a state where the lid is opened).

  FIG. 4 is a perspective view showing the configuration of the drip-proof cable connection box (the back side when the lid is opened).

  As shown in FIGS. 1, 3, and 4, the waterproof spaces 4, 4 are formed in the gravity direction (downward) portions on both sides to be the cable introduction portions 1 b, 1 b of the connection box body 1 and in the connection box body 1. The cable holding plates 5 and 5 formed from the side portion of the junction box body 1 to the lower edge portion, both side portions 1c and 1c of the lower edge portion of the junction box body 1, and the lid body 2 corresponding thereto. Gravitational direction (downward) parts on both sides, partition walls 6 and 6 formed on the lid 2 from the side of the lid 2 to the lower edge, and both sides of the lower edge of the lid 2 It is configured. The cable holding plates 5 and 5 are formed with at least one recess 7 into which the cable 201 is inserted.

  Here, the target optical fiber cable is, for example, a drop cable having a small cross section that is pulled down by a subscriber. The drop cable has a substantially square cross-sectional shape and employs a structure in which optical fibers are arranged between two tension members.

  The cross section of the recess 7 formed in the holding plate 5 for accommodating the optical fiber cable having such a cross-sectional shape is also a square shape along the cable outer diameter.

  FIG. 5 is a perspective view showing a configuration of a main part (waterproof space) of a junction box body of the drip-proof cable junction box.

  In this drip-proof cable connection box, as shown in FIG. 5, the cable 201 is connected to each waterproof space 4, 4 and the concave portion 7 of the cable holding plate 5, 5 from each cable introduction part 1b, 1b. It is introduced into the main body 1.

  FIG. 6 is a perspective view showing the configuration of the main part (cable gripping piece) of the junction box body of the drip-proof cable junction box.

  As shown in FIGS. 5 and 6, the cable introducing portions 1 b and 1 b are formed with a cable gripping portion 9 including a plurality of cable gripping pieces 8 for gripping at least one cable 201. Between the two cable gripping pieces 8, 8 is a cable gripping portion 9. That is, the cable gripping piece 8 is a partition plate, and the cable 201 is gripped by the cable gripping portion 9 by being sandwiched between the two cable gripping pieces 8 and 8. The cable gripping portion 9 is formed to have a width substantially equal to the thickness of the cable 201. Each cable gripping piece 8, 8 is formed in a slightly curved shape from the side of the junction box body 1 toward the recess 7 of the cable holding plate 5.

  In this drip-proof cable connection box, the cable gripping portion 9 including a plurality of cable gripping pieces 8 is transmitted by the cable 201 and is submerged by water droplets entering the connection box body 1 from the outside of the connection box body 1. The momentum is stopped. Further, even when there is a water droplet that has passed through the cable gripping portion 9, the water droplet is blocked in the waterproof spaces 4 and 4 and does not enter the junction box body 1.

  Further, in this drip-proof cable connection box, each cable gripping piece 8, 8 is formed in a slightly curved shape, and the cable holding plates 5, 5 are formed in an inclined manner. 201 is curved from the lower side to the upper side (the central part side of the junction box body 1), and the water droplets passing through each cable 201 are dropped downward to be discharged to the outer side of the drip-proof cable junction box. The

  FIG. 7 is a perspective view showing the configuration of the main part (shutter plate) of the junction box main body of the drip-proof cable junction box.

  And in this drip-proof type cable connection box, as shown in FIG.6 and FIG.7, when the cable holding part 9 is formed in multiple numbers, the upper cable holding part rather than the lower cable holding part 9 The length of gripping the cable 201 is shortened by about 9. That is, the length of the cable gripping piece 8 is made shorter toward the upper side. The reason why the cable gripping portion 9 on the upper side grips the cable 201 is shorter because the cable holding plates 5 and 5 are inclined. That is, the distance between the cable gripping portion 9 and the cable holding plates 5 and 5 is prevented from becoming narrow, and the cable 201 is prevented from being sharply bent between the cable gripping portion 9 and the cable holding plates 5 and 5. Because.

  At least in the uppermost cable gripping portion 9, a shutter plate 10 that closes the inner end of the cable gripping portion 9 is provided inside the cable gripping portion 9. In this embodiment, the shutter plate 10 is provided at two locations, the uppermost cable gripping portion 9 and the second cable gripping portion 9 from the top. The shutter plate 10 is made of a flexible material such as rubber. When the cable 201 is gripped by the corresponding cable gripping portion 9, the shutter plate 10 is pushed and deformed by the cable 201 and surrounds the periphery of the cable 201. It has become. Alternatively, when a relatively hard resin is used, the shutter plate 10 may fall down without being deformed and only press the cable 20 at the tip of the plate.

  In this drip-proof cable connection box, the shutter plate 10 stops the momentum of water immersion due to water droplets entering the connection box body 1 from the outside of the connection box body 1 through the cable 201. In particular, even if there are many water droplets entering the junction box body 1 through the upper cable 201, the upper cable gripping portion 9 has a shorter gripping length for the cable 201. It is designed to ensure waterproofness. Further, even when there is a water droplet that has entered beyond the shutter plate 10, the water droplet is blocked in the waterproof spaces 4 and 4 and does not enter the junction box body 1.

  FIG. 8 is a perspective view showing the configuration of the main part (cable holding fin) of the junction box body of the drip-proof cable junction box.

  Further, in this drip-proof cable connection box, as shown in FIGS. 7 and 8, the connection box body 1 includes a plurality of cable pressing fins 11 at positions on the outer side of the cable introduction portions 1b and 1b. Is provided. These cable presser fins 11 are formed in a hook-like shape on the tip side. The cable pressing fins 11 are formed so that the cable pressing fins 11 communicate with each other in correspondence with the cable gripping portions 9. That is, the cable holding fins 11 hold the cable 201 held by the cable holding portion 9 and hold the cable 201 by the hook-shaped tip side portion so as not to come off.

  In this drip-proof cable connection box, the cable holding fins 11 are provided, so that the cable 201 is held between the cable holding fins 11 and held by the hook-shaped tip side portion. It is prevented from falling out to the front side of the junction box body 1 indicated by an arrow B inside.

  In this drip-proof cable connection box, the cover body 2 is opened when the optical fiber cable is connected or the like, but the cover 3 is opened because the hinge 3 is located below the connection box body 1. There is no need for a stopper to hold it. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced.

  When the lid 2 is closed after the operation is finished, the lid 2 is turned upward about the hinge 3 and then pushed into the inner part of the junction box body 1 to connect the claws formed on the top of the lid 2. Locked to the box body 1 and locked so that the lid 2 does not open. As described above, when the lid 2 is closed, the lid 2 is simply pushed in.

It is a perspective view which fractures | ruptures and shows the structure of the drip-proof type | mold cable connection box of one Embodiment of this invention. It is a perspective view which shows the structure of the connection box main body of the said drip-proof type cable connection box. It is a perspective view which shows the structure (front side of the state which opened the cover body) of the said drip-proof type cable connection box. It is a perspective view which shows the structure (the back side of the state which opened the cover body) of the said drip-proof type cable connection box. It is a perspective view which shows the structure of the principal part (waterproof space) of the connection box main body of the said drip-proof type cable connection box. It is a perspective view which shows the structure of the principal part (cable grip piece) of the connection box main body of the said drip-proof type cable connection box. It is a perspective view which shows the structure of the principal part (shutter board) of the connection box main body of the said drip-proof type cable connection box. It is a perspective view which shows the structure of the principal part (cable presser fin) of the junction box main body of the said drip-proof type cable junction box. It is a partially cutaway side view of a conventional drip-proof cable connection box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connection box main body 1b Cable introduction part 2 Cover body 3 Hinge part 4 Waterproof space 5 Cable holding plate 6 Bulkhead 7 Recessed part 8 Cable holding piece 9 Cable holding part 10 Shutter board 11 Cable holding fin

Claims (5)

A drip-proof cable connection box comprising a junction box body whose front side is opened, and a lid that covers the front side of the junction box body so as to be openable and closable,
The junction box body has a cable introduction part in which at least one cable is introduced into the junction box body from the outer side of the junction box body in the gravity direction portion on both sides,
When the lid is closed with respect to the connection box main body, the lid and the connection box main body work together in the vicinity of each cable introduction portion, and the inner side of the connection box main body. A drip-proof cable connection box characterized in that a waterproof space isolated from each other is formed. The waterproof space includes a gravity direction portion on both sides to be a cable introduction portion of the connection box body, and a cable holding plate formed from the side portion of the connection box body to a lower edge portion in the connection box body. , Both side portions of the lower edge portion of the connection box main body, corresponding gravity direction portions on both side portions of the lid body, and the lid body formed from the side portion of the lid body to the lower edge portion. It is constituted by a partition and both side portions of the lower edge of the lid,
The cable introduction portion is formed with a cable gripping portion including a plurality of cable gripping pieces for gripping at least one cable, and the cable holding plate has at least one for inserting a cable. The drip-proof cable connection box according to claim 1, wherein a recess is formed. When a plurality of the cable gripping portions are formed, the length of the upper cable gripping portion gripping the cable is shorter than that of the lower cable gripping portion, and at least in the uppermost cable gripping portion, The drip-proof cable connection box according to claim 2, wherein a shutter plate made of a flexible material that closes an inner end of the cable gripping portion is provided inside the cable gripping portion. The connection box main body is provided with a plurality of cable pressing fins at positions on the outer side of the cable introducing portion, and the cable pressing fins are formed in a hook shape at the tip side, The drip-proof cable connection box according to claim 2 or 3, wherein the cable held by the portion is sandwiched and held by the hook-shaped tip side portion. The drip-proof cable connection box according to any one of claims 2 to 4, wherein the waterproof space has a substantially triangular shape.

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