JP3274941B2 - Closure for communication cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication cable closure for covering a connection portion such as a metal core wire or an optical fiber core wire constituting a communication line cable.

[0002]

2. Description of the Related Art Conventionally, a groove provided on a divided surface of a semi-cylindrical sleeve formed by dividing a cylindrical body into two in a longitudinal direction has a diameter slightly larger than twice the depth of the groove. After attaching a string-shaped sealing member formed in the same diameter as a whole,
A communication in which the divided surfaces of two semi-cylindrical sleeves are formed into a cylindrical shape, and the two semi-cylindrical sleeves are joined by a fastening band or the like so as to cover the connection portion of the communication line cable in an airtight state. Cable closures are known.

[0003]

In a conventional communication cable closure, a string-shaped sealing member is attached to a groove provided on a divided surface of one half-cylindrical sleeve, and then the other half-cylindrical sleeve is mounted. The connection part of the communication line cable is accommodated in the communication cable closure by covering the shape of the sleeve, and at this time, the string-like shape attached to the groove provided on the divided surface of one of the semi-cylindrical sleeves A part of the sealing member may protrude from the groove, and the protruding string-shaped sealing member may be sandwiched between the divided surfaces of the two semi-cylindrical sleeves, and thus the airtightness of the communication cable closure is impaired at that portion. Problem.

In order to solve the above-mentioned problem, a string-shaped sealing member is fixed to a groove provided on a divided surface of a semi-cylindrical sleeve using an adhesive. When the string-shaped sealing member is fixed to the groove using an adhesive, when the divided surfaces of the two semi-cylindrical sleeves are brought into contact with each other and fastened by a fastening band or the like, the string-shaped sealing member is tightened by a fastening pressure. Since the elongation in the longitudinal direction is restrained at the place fixed by the adhesive, the string-shaped seal member may bend out of the groove in a meandering shape, and may be sandwiched between the divided surfaces of the semi-cylindrical sleeve. At that point, there is a problem that the airtightness of the communication cable closure is impaired. Further, when the string-shaped sealing member is fixed to the groove using an adhesive, when replacing the string-shaped sealing member, it takes time and effort to separate and remove the string-shaped sealing member from the groove. There is a problem that the property is deteriorated.

An object of the present invention is to solve the above-mentioned problems of the conventional communication cable closure and to provide a communication cable closure with improved workability of accommodating the cable in the communication cable closure.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a pair of a pair of sealing members each having a longitudinally extending sealing member receiving groove formed in an end wall having a recess and a dividing surface. What is claimed is: 1. A communication cable closure comprising a sleeve and a string-shaped seal member mounted in the seal member accommodating groove, wherein the string-shaped seal member is provided with a cutout recess. A seal member capable of being plastically deformed and having an appropriate adhesive force is disposed so as to be substantially flush with the surface of the seal member having a shape of a circle, and a seal member accommodating groove provided on a division surface of one of the sleeves is provided. After attaching the string-shaped sealing member, the other sleeve is covered with the one sleeve so that the divided surfaces are joined, so that the upper surface is formed.
Seal member housing provided along the longitudinal direction on the dividing surface
The string-shaped sealing member is attached to only the groove and assembled, and a part of the string-shaped sealing member is separated from another part over a predetermined length. A notch recess is formed by making the diameter smaller.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of a communication cable closure of the present invention including a partially cut-away portion, FIG. 2 is an exploded perspective view of the communication cable closure of the present invention, and FIG. The communication cable of the present invention will be described with reference to FIG. 3 which is a plan view of a string-shaped sealing member for sealing the closure in an airtight state and FIG. 4 which is a perspective view of the communication cable closure of the present invention in an assembled state. An embodiment of the closure for use will be described, but the present invention is not limited to the embodiment without departing from the spirit of the present invention.

Reference numerals 1a and 1b denote substantially semi-cylindrical synthetic resin or metal sleeves having a shape formed by dividing a cylindrical body into two in a longitudinal direction. A sleeve 1b is placed on the sleeve 1a. The communication cable closure R is formed by covering the divided surfaces 2a and 2a 'of the sleeve 1b so as to be joined to the divided surfaces 2b and 2b' of the sleeve 1b.

Next, the structure of the sleeve 1a and the sleeve 1b will be described. Since the sleeve 1a and the sleeve 1b have the same structure, only the structure of the sleeve 1a will be described below. The sleeve 1a
Each component of the sleeve 1a has an "a" appended to the Arabic numeral, and the component of the sleeve 1b corresponding to each component of the sleeve 1a has the same Arabic numeral used for each component of the sleeve 1a. Is appended with "b".

Reference numerals 3a and 3a 'denote split surfaces 2 of the sleeve 1a.
a, 2a 'are seal member accommodation grooves in which a string-shaped seal member S, which will be described later, is provided along the longitudinal direction of the sleeve 1a, and 4a, 4a' are disposed at both ends of the sleeve 1a. The end walls 4a, 4a 'are provided with substantially semicircular recesses 5a, 5a' for a predetermined number of cables C to be inserted into the communication cable closure R. . 6a, 6a 'are end walls 4a, 4a'
Are provided along the recesses 5a, 5a 'of the first embodiment, and the grooves 6a, 6a' have end faces made of rubber or synthetic resin for sealing both ends of the communication cable closure R in an airtight state. h1 and h1 ′ are fitted, and the end face plates h1 and h1
The h1 'is attached to the crest 7a between the recesses 5a of the end wall 4a and the crest 7a' between the recesses 5a 'of the end wall 4a' by screws h2 or the like.

8a and 8a 'are formed near the end walls 4a and 4a' in a substantially vertical protruding manner on the inner wall of the sleeve 1a near the dividing surfaces 2a and 2a '. The flanges h4, h4 'of the known cable grippers h3, h3' are attached to the upper end surfaces of the columns 8a, 8a 'from appropriate fixing tools such as screws (not shown). Is configured. In FIG. 2, a portion C ′ indicated by a two-dot chain line is a known connection portion to which a core c constituting the cable C is connected, and details thereof are omitted.

Reference numeral 9a denotes two ribs 10a, 10a protruding from the outer wall of the sleeve 1a at predetermined intervals in the circumferential direction.
This is a fastening band recess formed by a ′, and an appropriate number of such fastening band recesses 9a can be arranged at predetermined intervals in the longitudinal direction of the sleeve 1a.

S is the dividing surface 2 of the sleeve 1a described above.
a, 2a ', seal member accommodation grooves 3a, 3a'
Is a string-shaped sealing member made of rubber or soft synthetic resin or the like, and the string-shaped sealing member S has a diameter slightly larger than twice the depth of the sealing member receiving grooves 3a, 3a '. ing. As shown in FIG. 3A, the string-shaped seal member S is formed by making a part of the string-shaped seal member S smaller in diameter than other parts over a predetermined length. A predetermined number of cutout concave portions s1 are provided. In this embodiment, an example is shown in which two notch recesses s1 are provided near both ends of the string-shaped seal member S. However, the notch recesses s1 are formed near both ends of the string-shaped seal member S. In addition, it can be provided at the center of the string-shaped seal member S. Such a cutout recess s1 is not limited to the above-described embodiment, and can be provided in a predetermined number at appropriate intervals as needed.

In FIG. 3 (b), s2 is disposed in a cutout recess s1 provided in the string-shaped sealing member S so as to be substantially flush with the surface S 'of the string-shaped sealing member S. The sealing material s2 is made of a material such as rubber or synthetic resin which can be plastically deformed by an appropriate pressure like a clay, has an appropriate adhesive force to the sleeve 1a, and has a waterproof property, like a clay. Have been. Such a sealing material s
2 is preferably formed into a tape having a width corresponding to the length of the notch recess s1 and wound around the notch recess s1 one or more times to be disposed in the notch recess s1.

Next, the assembly of the communication cable closure R will be described mainly with reference to FIGS.

First, the jacket of the cable C is cut to a predetermined length, the cores c are exposed from the jacket, and the cables C are gripped by the cable grippers h3 and h3 '. After wrapping a sealing tape or the like around the cover, the cable C is inserted into the end plates h1 and h1 '. Next, after the connecting operation of the core wire c is performed inside the sleeve 1a, the string-shaped sealing member is inserted into the cutout recess s1 in the sealing member accommodating grooves 3a, 3a 'provided in the divided surfaces 2a, 2a' of the sleeve 1a. A string-shaped sealing member S on which a sealing material s2 is disposed so as to be substantially flush with the surface S ′ of S is mounted.
At this time, the string-shaped sealing member S is temporarily adhered to the surfaces of the sealing member receiving grooves 3a, 3a 'by the sealing member s2 having an appropriate adhesive force provided in the cutout recess s1, and the sealing member S Jumping out of the accommodation grooves 3a, 3a 'is prevented. In addition, a sealing tape or the like is wound around the end face plates h1 and h1 'as necessary.

In this state, the other sleeve 1b is
On the sleeve 1a, the divided surfaces 2a, 2a 'of the sleeve 1a
And the split surfaces 2b, 2b 'of the sleeve 1b are joined so that the split surfaces 2b, 2b' of the sleeve 1b are joined.
A substantially upper half of the string-shaped seal member S is mounted in the seal member housing grooves 3b and 3b 'provided in the above. The split surfaces 2a, 2a ', 2b, 2
After the joining at b ′ is completed, as shown in FIG. 4, the ribs 10 protruding from the outer walls of the sleeves 1a and 1b are provided.
The fastening band B is attached to the fastening band recesses 9a, 9b formed by the a, 10a ', 10b, 10b', and the sleeves 1a, 1b are fastened and connected.

As described above, the string-shaped sealing member S
Since the sealing member s2 provided in the notch recess s1 and having a suitable adhesive strength is temporarily bonded to the surfaces of the sealing member receiving grooves 3a and 3a ', the sealing member receiving groove of the string-shaped sealing member S is provided. 3a, 3a 'can be prevented from jumping out. Therefore, the string-shaped sealing member S is sandwiched between the divided surfaces 2a, 2a' of the sleeve 1a and the divided surfaces 2b, 2b 'of the sleeve 1b, and the portion is airtight. The sealing material s2 can be plastically deformed by an appropriate pressure, so that the sleeves 1a, 1b
Does not limit the movement of the string-shaped seal member S due to the elongation in the length direction of the string-shaped seal member S due to the tightening by the fastening band B, so that the string-shaped seal member S may bend in a meandering shape. Can be prevented.

The string-shaped sealing member S is made of a sealing material s
2, the seal member accommodating grooves 3a, 3a 'of the sleeve 1a.
And is prevented from protruding from the sealing member receiving grooves 3a and 3a ', so that when the sleeve 1b is put on the sleeve 1a, the sealing of the sleeve 1a of the string-shaped sealing member S is performed. Member accommodation grooves 3a, 3a '
It is possible to quickly and reliably assemble the communication cable closure R without checking the state of protrusion from the communication cable.

In the embodiment described above, an example is shown in which a cutout recess s1 is formed in the string-shaped seal member S by making a part of the string-shaped seal member S smaller in diameter than the other part. However, without providing the cut-out recess s1 over the entire circumference of the string-like seal member S, a cut-out recess is provided by cutting out a part of the string-like seal member S. The sealing member s2 can be provided so as to be substantially flush with the surface S ′ of the seal member S having a shape like a letter. In the case of such an embodiment, the string-shaped sealing member S is attached to the sleeve 1 such that the cutout recess in which the sealing material s2 is provided is located on the surface side of the sealing member receiving grooves 3a, 3a 'of the sleeve 1a.
The seal member accommodating grooves 3a and 3a 'of FIG. Further, in the above-described embodiment, the sleeve 1a,
Although an example is shown in which 1b is formed into a substantially semi-cylindrical shape formed by dividing a cylindrical body into two in the longitudinal direction, a cylindrical body such as a prism or an elliptical cylinder may be formed by dividing into two. .

[0021]

Since the present invention is configured as described above, it has the following effects.

Since the string-shaped sealing member is temporarily adhered to the surface of the sealing member accommodating groove by the adhesive sealing material, the string-shaped sealing member can be prevented from jumping out of the sealing member accommodating groove. Therefore, the problem that the string-shaped sealing member is interposed between the divided surfaces of the sleeve and the airtightness of the communication cable closure is impaired at that portion can be solved.

Since the sealing member can be plastically deformed by an appropriate pressure, the movement of the string-shaped sealing member in the lengthwise direction due to the tightening of the sleeve by the fastening band is not restricted. In addition, it is possible to prevent the string-shaped seal member from bending in a meandering manner.

Since the string-shaped seal member is temporarily attached to the surface of the seal member housing groove of one sleeve by the seal material and does not protrude from the seal member housing groove,
Assemble the communication cable closure quickly and securely without checking the state of the string-shaped seal member protruding from the seal member receiving groove when the other sleeve is covered. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view of a closure for a communication cable according to the present invention including a partially cutaway portion.

FIG. 2 is an exploded perspective view of the communication cable closure of the present invention.

FIG. 3 is a plan view of a string-shaped sealing member for hermetically sealing the communication cable closure of the present invention.

FIG. 4 is a perspective view of the communication cable closure of the present invention in an assembled state.

[Explanation of symbols]

 B: Fastening band C: Cable R: Closure for communication cable S: String-shaped sealing member c: ··· Core wire s1 ····· Notch recess s2 ····· Seal material 1a, 1b ··· Sleeve 2a, 2b ··· Division surface 3a, 3b ··· Seal member accommodation groove

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G02B 6/00 336 G02B 6/24 H02G 15/10

Claims (2)

(57) [Claims] 1. A pair of sleeves having a seal member accommodating groove provided along a longitudinal direction on an end wall portion provided with a concave portion and a dividing surface, and a string-shaped seal member attached to the seal member accommodating groove. Wherein the string-shaped sealing member is provided with a cutout recess,
A sealing material that is plastically deformable and has an appropriate adhesive force is disposed in the notch recess so as to be substantially flush with the surface of the string-shaped sealing member, and is provided on a split surface of one of the sleeves. After the string-shaped sealing member is mounted in the sealing member receiving groove, the other sleeve is covered with the other sleeve so that the divided surfaces are joined to each other , whereby
Of the seal member accommodation groove provided in the split surface along the longitudinal direction.
In addition , a communication cable closure characterized in that the string-shaped sealing member is mounted and assembled. 2. The communication cable according to claim 1, wherein a cutout recess is formed by making a part of the string-shaped seal member smaller in diameter than another part over a predetermined length. Closure.