JPH063362Y2 - Cable connection cable closure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a closure for a cable connecting portion used in a connecting portion of a communication cable containing a conductor core wire or an optical cable containing an optical fiber core wire.

[Prior Art] 2 in a conventional closure for a cable connecting portion of this type
The split surface of the split sleeve is sealed by facing both flanges 3 and 4 provided on both sides along the split surface 2 of the sleeve 1 as shown in FIG. The seal material 7 having a string shape is interposed between the seal material accommodating grooves 5 and 6 provided at the same depth so as to face each other, and both flanges 3 and 4 are fastened by fastening means (not shown) to hermetically seal.

Alternatively, as shown in FIG. 5, the sealing material accommodating groove 5 is provided only in one of the flanges 3 and the sealing material accommodating groove is not provided in the other flange 4, and the sealing material is provided only in the one flange 3. The string-shaped sealing material 7 is housed in the housing groove 5, and both flanges 3 and 4 are fastened by fastening means (not shown) to hermetically seal.

[Problems to be Solved by the Invention] However, in the closure having the seal structure as shown in FIG. 4, since the sealing material accommodating grooves 5 and 6 have the same shape, the depths of the grooves 5 and 6 are not limited to the string. The sealing material 7 is accommodated in the sealing material accommodation groove 5 of the lower flange 3 which is shallower than the radius of the annular sealing material 7, and is covered with the upper flange 4 for sealing. At this time, a part of the string-shaped seal material 7 in the lengthwise direction pops out from the seal-material receiving groove 5, and a place where the string-shaped seal material 7 is caught between the planes of the flanges 3 and 4 is likely to occur. , There was a problem that the airtightness was easy to break in that part.

On the other hand, in the seal structure shown in FIG. 5, the string-shaped sealing material 7 can be prevented from protruding, but the upper flange 4
Since the inner surface of No. 1 has no sealing material accommodating groove and is a flat surface, there is a problem that if the inner plane is scratched, the airtightness is likely to be broken along the scratch.

An object of the present invention is to provide a closure for a cable connecting portion, which can prevent the string-shaped sealing material from popping out of the sealing material housing groove during construction, and which is not likely to break the airtightness even if the inner surface of the flange is scratched. To do.

[Means for Solving the Problems] The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 to 3 corresponding to the embodiments. The sleeve 1 and an end face plate 15 that closes both ends of the sleeve 1 are provided, and the split surface 2 of the sleeve 1 is provided with flanges 3 and 4 facing each other along the split surface 2 so as to face each other. Sealing material accommodating grooves 5 and 6 are provided on opposing surfaces of the flanges 3 and 4, respectively, and a string-shaped sealing material 7 is accommodated in both of the sealing material accommodating grooves 5 and 6.
In the cable connecting portion closure having a structure in which the both flanges 3 and 4 are airtightly fastened by the fastening means 13, one of the two sealing material accommodating grooves 5 and 6 has a radius greater than that of the string-shaped sealing material 7. Is deeper, and the other 6 is formed to be shallower than the radius of the string-shaped sealing material 7.

[Operation] As described above, the sealing material receiving grooves 5 and 6 are provided for both the flanges 3 and 4, one sealing material receiving groove 5 is deeper than the radius of the string-shaped sealing material 7, and the other sealing material receiving groove 6 is If the string-shaped sealing material 7 is provided shallower than the radius of the string-shaped sealing material, the string-shaped sealing material 7 is mostly sealed in the radial direction when the string-shaped sealing material 7 is accommodated in the deeper sealing material housing groove 5. Since it is accommodated in the material accommodating groove 5, the accommodating state is stable, and a part of the length direction does not pop out at the time of construction.

Further, since the flanges 3 and 4 both have the sealing material receiving grooves 5 and 6 on their inner surfaces, even if the sealing surface is damaged, there are sufficiently deep sealing material receiving grooves 5 and 6 there, and Since the string-shaped sealing material 7 is housed, the airtightness is not broken.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 3. As shown in the figure, the cable connecting portion closure of this embodiment has a plastic sleeve 1 for covering the core wire connecting portions (not shown) that connect the core wires 9 of both cables 8 to each other. Is vertically divided into two, and flanges 3 and 4 are provided along both sides of the split surface 2. Sealing material receiving grooves 5 and 6 are provided on the inner surfaces of the flanges 3 and 4 facing each other along the longitudinal direction thereof so as to face each other. These seal material accommodating grooves 5,
One of the sealing material accommodating grooves 5 is deeper than the radius of the string-shaped sealing material 7 accommodated therein, and the other sealing material accommodating groove 6 is shallower than the radius of the string-shaped sealing material 7. . The string-shaped sealing material 7 is housed in the sealing material housing grooves 5 and 6 facing each other. Reinforcing metal fittings 10 and 11 are brought into contact with the outer surfaces of the flanges 3 and 4, and screw holes and screw through holes (not shown) are provided in the reinforcing metal fittings 10 and 11 so as to face each other. Both flanges 3,
4 also has a screw through hole. The bolt 12 is passed through the corresponding screw through holes, and the bolt 12 is inserted into the screw hole.
Are screwed together, and by tightening the bolt 12, both flanges 3 and 4 are fastened to perform an airtight seal. Bolt 12, reinforcing metal fitting 10 having a screw hole,
Fastening means 13 by means of a reinforcing metal fitting 11 having a screw through hole
Is configured.

End face plate fitting recesses 14 are provided at both ends of the sleeve 1, and rubber end face plates 15 are fitted into the end face plate fitting recesses 14, respectively, and both ends of the sleeve 1 are closed. Each end plate 15 has a cable through hole 1 at its center.
6 is provided, and a radial or radial dividing surface 17 is provided in the radial direction for easy attachment to the cable 8. Sealing materials 18 are respectively interposed between the joint surfaces of the cable 8 and the end face plate 15, between the split faces 17 of the end face plate 15, and between the end face plate 15 and the sleeve 1 to provide a seal.

Cable grip fittings 19 are provided adjacent to the end plates 15 for gripping the ends of the cables 8 introduced into the sleeve 1 through the cable through holes 16 of the end plates 15. They are connected to each other by a connecting rod 20. The core wires 9 of the mutual cables 8 are connected to each other at a core wire connection portion (not shown) and are housed in the sleeve 1.

[Effects of the Invention] As described above, in the cable connection closure according to the present invention, one of the sealing material accommodating grooves of the flange provided on each side of the split surface of the sleeve has a radius of a string-shaped sealing material. Since the other side is provided shallower than the radius of the string-shaped seal material, the string-shaped seal material can be accommodated in advance in the deeper seal material accommodation groove. Most of the material in the radial direction will be accommodated in the sealing material accommodating groove, the accommodating state is stable, and part of the string-shaped sealing material in the longitudinal direction does not pop out partially during construction, Therefore, the string-shaped sealing material is not caught between the inner surfaces of both flanges, and the cause of airtightness can be avoided. In addition, since the inner surface of each of the flanges has a seal material accommodating groove, even if the inner surface is damaged, there is a seal material accommodating groove that is sufficiently deeper than that, and a string-shaped seal material is accommodated therein. Therefore, it is possible to prevent the airtightness from being broken by the scratch on the inner surface of the flange.

[Brief description of drawings]

FIG. 1 is a lateral cross-sectional view of a main part of an embodiment of a closure according to the present invention, FIG. 2 is a partially longitudinal front view of the closure of this embodiment, FIG. 3 is a right side view of FIG. FIG. 5 and FIG. 5 are cross-sectional views of a main part showing two examples of conventional closures. 1 ... Sleeve, 2 ... Split surface, 3, 4 ... Flange, 5, 6
... sealing material accommodating groove, 7 ... string-shaped sealing material, 15 ... end face plate.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hidehisa Miyazawa 6 Yawata Kaigan Dori, Ichihara City, Chiba Prefecture Furukawa Electric Co., Ltd. Chiba Electric Wire Works (72) Creator Hiroki Sakuyama 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corp. (72) Inventor Tomofumi Tamamura 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp. (72) Yuya Iwamoto 1 Taya-cho, Totsuka-ku, Yokohama-shi, Kanagawa Sumitomo Denki Kogyo Co., Ltd. Yokohama Works (72) Inventor Hiroshi Yokosuka 1440 Rokuzaki, Sakura City, Chiba Fujikura Electric Co., Ltd. Sakura Factory (56) References: Development 55-141235 (JP, U) Development 55-70207 (JP, U) Actually open Sho 61-36806 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A split sleeve, and an end face plate for closing both ends of the sleeve, wherein a flange is provided on the split surface of the sleeve so as to face each other along the split surface. A cable having a structure in which sealing material accommodation grooves are provided on opposite surfaces of the flange so as to face each other, a string-shaped sealing material is accommodated in the both sealing material accommodation grooves, and the both flanges are airtightly fastened by fastening means. In the closure for connection portion, one of the both sealing material accommodating grooves is formed deeper than a radius of the string-shaped sealing material, and the other is formed shallower than a radius of the string-shaped sealing material. Closure for cable connection.