JPH0354890U

JPH0354890U -

Info

Publication number: JPH0354890U
Application number: JP11579489U
Authority: JP
Priority date: 1989-10-03
Filing date: 1989-10-03
Publication date: 1991-05-27

Description

[Brief explanation of drawings]

第１図〜第４図は本考案の一実施例を示す図で
、第１図は縦断面図、第２図は第１図のＡ矢視図
、第３図は第１図のＢ−Ｂ断面図、第４図はロー
ラビツトの取付順序を示す図、第５図〜第７図は
従来の一般的なローラビツト取付装置を示す図で
、第５図は縦断面図、第６図は第５図のＣ矢視図
、第７図は第５図のＤ−Ｄ断面図、第８図〜第１
０図は別の従来例を示す図で、第８図は縦断面図
、第９図は第８図のＥ矢視図、第１０図は第８図
のＦ−Ｆ断面図である。１……ローラビツト、２……ローラビツト中心
軸、２ａ……軸の両端部、３……ケーシング、３
ａ……反切羽側端面、３ｂ……軸受部、３ｃ……
溝、３ｄ……溝の拡大部、４……カツタヘツド、
５……支持材、６……ストツパ、７……押え板、
８……取付用ボルト、１６……土砂取込み用開口
部。 1 to 4 are views showing one embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional view, FIG. 2 is a view taken along arrow A in FIG. 1, and FIG. B sectional view, FIG. 4 is a diagram showing the mounting order of the roller bit, FIGS. 5 to 7 are diagrams showing a conventional general roller bit mounting device, FIG. 5 is a longitudinal sectional view, and FIG. 5 is a view in the direction of arrow C, FIG. 7 is a sectional view taken along line DD in FIG. 5, and FIGS.
0 is a diagram showing another conventional example, FIG. 8 is a longitudinal cross-sectional view, FIG. 9 is a view taken along arrow E in FIG. 8, and FIG. 10 is a cross-sectional view taken along line FF in FIG. 1... Roller bit, 2... Roller bit center shaft, 2a... Both ends of shaft, 3... Casing, 3
a... End face on the opposite face side, 3b... Bearing part, 3c...
Groove, 3d... Enlarged part of the groove, 4... Cut head,
5... Support material, 6... Stopper, 7... Holding plate,
8...Mounting bolt, 16...Opening for taking in earth and sand.

Claims

[Scope of utility model registration request]

It has a built-in roller bit, and grooves for inserting both ends of the roller bit center shaft are provided at two opposing locations on the inner surface from the end face on the side opposite to the face to the bearing part, and an enlarged part with a wider groove width is provided in the middle of the groove. a casing in the shape of a rectangular frame; a support member that is inserted into the groove and supports both ends of the roller bit center shaft together with the bearing portion of the casing; and a stopper that is inserted into the enlarged part of the groove to prevent the support member from coming off. and a fitting for pressing the stopper against the casing, the casing is attached to a cutter head of a tunnel excavator, and an opening for taking in dirt is formed between the roller bit and the casing. .