JPH04134U

JPH04134U -

Info

Publication number: JPH04134U
Application number: JP3773890U
Authority: JP
Priority date: 1990-04-09
Filing date: 1990-04-09
Publication date: 1992-01-06
Anticipated expiration: 2005-04-09
Also published as: JP2528553Y2

Description

[Brief explanation of the drawing]

第１図はこの考案のベルブロツク用栓部材を使
用したベルブロツクの一実施例を示す一部切欠き
断面図、第２図はこの考案のベルブロツク用栓部
材をベルブロツクに装着する前の状態を示す要部
の断面図、第３図はこの考案のベルブロツク用栓
部材の他の実施例を示す断面図、第４図はさらに
他の実施例を示すもので、ａは分離されている状
態の栓部材を示す断面図、ｂは同正面図を示す。
第５図は第４図に示す栓部材の使用法を説明する
ための斜視図、第６図は従前のベルブロツクを説
明するための分解斜視図である。１０……マンホール、１１……ベルブロツク、
１２^ａ……１２^ｎ……ケーブル挿通孔、１３……
ケーブル、１４……ダクト、１５……空のダクト
、１７……栓部材、１７ａ……蓋体、１７ｂ……
ケーブル保持孔、１７ｃ……筒状体、１８，２８
……延焼防止材、２７……栓部材、Ｘ，Ｙ……栓
部２７を構成する分割体。 Fig. 1 is a partially cutaway sectional view showing an embodiment of a bell block using the bell block plug member of this invention, and Fig. 2 is a schematic diagram showing the state before the bell block plug member of this invention is attached to the bell block. FIG. 3 is a sectional view showing another embodiment of the bell block plug member of this invention, and FIG. 4 shows still another embodiment, where a shows the plug member in a separated state. A sectional view showing , and b shows a front view of the same.
FIG. 5 is a perspective view for explaining how to use the plug member shown in FIG. 4, and FIG. 6 is an exploded perspective view for explaining the conventional bell block. 10...Manhole, 11...Berbrodsk,
^12a ... ¹²ⁿ ...Cable insertion hole, 13...
Cable, 14... Duct, 15... Empty duct, 17... Plug member, 17a... Lid, 17b...
Cable holding hole, 17c...Cylindrical body, 18, 28
...Fire spread prevention material, 27... Plug member, X, Y... Divided body constituting the plug portion 27.

Claims

[Claims for Utility Model Registration] (1) A plug member to be attached to a cable insertion hole formed in a bell block, which is made of a nonflammable material and has a diameter that is approximately the same as the inner diameter of the opening at one end of the cable insertion hole. A cylindrical body is formed, and a lid body having a cable holding hole in the center is integrally formed at the proximal end of the cylindrical body, and the inner circumference of the cylindrical body is foamed by heat. A bell block for a manhole characterized by carrying a fire spread prevention material made of a foamable material covered with a protective film that is impermeable to gas and moisture. (2) In the bell block plug member according to claim 1, the plug member includes a lid body having a cable holding hole in the center, and a cylindrical body provided on one surface of the lid body surrounding the cable holding hole. 1. A plug member for a bell block, comprising a plurality of divided bodies, each of which has a fire spread prevention material supported on its inner periphery so as to be integrated during use. (3) In the bell block plug member according to claim 1, the plug member includes a lid body having a cable holding hole in the center, and a cylindrical body provided on one surface of the lid body surrounding the cable holding hole. is composed of a plurality of divided bodies, each divided body carries a fire spread prevention material on its inner periphery, and an engaging protrusion provided on the engaging surface of one of the divided bodies is connected to the other divided body. 1. A plug member for a bell block, characterized in that the plug member is configured to fit into an engaging recess provided on an engaging surface of a bell block and to be integrated during use. (4) In the bell block plug member according to claim 1, the plug member has a cylindrical body that is inserted into the cable insertion hole, has an outer diameter smaller than an inner diameter of the cable insertion hole, and has a A stopper material for a bell block, characterized in that a fire spread preventing material is supported and the fire spread preventing material is also supported on the outer periphery.