Optical waveguides – Accessories
Reexamination Certificate
1997-04-10
2001-05-01
Bovernick, Rodney (Department: 2874)
Optical waveguides
Accessories
C385S095000, C385S135000, C174S068300, C174S092000
Reexamination Certificate
active
06226434
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a closure for protection of a connection section or splicing section of a communication cable such as an optical fiber cable or the like, and more particularly to an improvement in a cable closure for connection of an optical fiber cable.
In general, a closure for cable connection which has been typically applied to such a purpose includes a cable receiving structure for protection of a connection section of a cable. The cable receiving structure includes end plates through which a cable is inserted and a cylindrical sleeve formed so as to receive the cable connection section therein while covering it and constructed so as to be split in a longitudinal direction thereof. Two lengthwise split parts of the sleeve arranged between the end plates in a manner to be opposite to each other are joined together through abutting portions thereof opposite to each other using any suitable fixing means such as screws or the like, resulting in providing the sleeve for airtightly or water-tightly protecting the cable connection section.
The conventional cable closure thus formed is required to exhibit rigidity sufficient to prevent deformation of the sleeve and properties sufficient to prevent intrusion of moisture thereinto. For this purpose, the sleeve is so constructed that components or parts therefor are closely or tightly coupled to each other and coupling between the cable and the sleeve is likewise tightly carried out. Unfortunately, such construction of the conventional sleeve causes setting and handling of the cable led out of the end plates to be substantially troublesome, when branching of the cable, lead-in thereof, connection thereof or the like is desired. Also, in order that the conventional sleeve ensures sufficient connection and fastening of the cable, it is rendered complicated in structure and expensive due to troublesome manufacturing thereof. Further, the sleeve fails to exhibit satisfactory durability. In addition, the conventional cable closure is provided with a tray guide for receiving a connection section of a cable fiber and an excessive fiber of the cable fiber therein, which is formed by stacking a plurality of receiving trays on each other. Unfortunately, handling of the receiving trays each having the cable fiber received therein and assembling and disassembling of the tray guide are highly troublesome, because a number of tools are required therefor and the tray guide is extensively complicated in structure.
SUMMARY OF THE INVENTION
The present invention has been made in view of the foregoing disadvantage of the prior art.
Accordingly, it is an object of the present invention to provide a closure for cable connection which is capable of effectively preventing deformation of a sleeve.
It is another object of the present invention to provide a closure for cable connection which is capable of facilitating incorporation and setting of a cable therein.
It is a further object of the present invention to provide a closure for cable connection which is capable of satisfactorily exhibiting increased safety and airtightness.
It is still another object of the present invention to provide a closure for cable connection which is capable of exhibiting highly improved workability in assembling of a sleeve.
It is a still further object of the present invention to provide a closure for cable connection which is capable of accomplishing connection of a cable substantially without requiring tools and skill, to thereby carry out cable connection with highly improved workability.
In accordance with the present invention, a closure for cable connection is provided. The closure includes a sleeve of a cylindrical shape into which a cable is introduced, a cable connection mechanism arranged in the sleeve to carry out connection and fixing of the cable, and a connection fitment which is arranged in the sleeve and on which the cable connection mechanism is mounted. The sleeve is provided on an inner surface thereof with a plurality of connection fitment mounting sections and the connection fitment is detachably fittedly fixed on the connection fitment mounting sections.
The closure for cable connection is so constructed that the sleeve is opened at joint edges thereof and the connection fitment is forced in the connection fitment mounting sections provided on upper and lower portions of the inner surface of the sleeve. Such construction permits the connection fitment to be mounted in the sleeve by a one-touch operation. The connection fitment is mounted thereon with a tray fixing stand base, on which fiber cable storage casings are detachably securely mounted. The connection fitment permits the sleeve to be reinforced over a whole length thereof, resulting in preventing deformation of the sleeve to provide the closure with increased safety and reliability.
The closure may be assembled by inserting a cable through the end plates thereinto to connect it to the cable connection mechanism, pivotally moving one side of the sleeve about a hinge to cover the end plates therewith while forcing it against the end plates, and engaging the joint edges with each other while pressing both sides of the sleeve against each other. Also, release of connection between the joint edges of the sleeve permits at least one side of the sleeve to be readily developed about the hinge to open the sleeve, to thereby facilitate a cable connection operation.
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Hattori Tadashi
Koshiyama Koji
Nozawa Tetsuo
Tamaki Yasuhiro
Tsuruta Yasunari
Bovernick Rodney
Japan Recom Ltd.
Kim Ellen E.
Lerner David Littenberg Krumholz & Mentlik LLP
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