JPH0329590U

JPH0329590U -

Info

Publication number: JPH0329590U
Application number: JP8935989U
Authority: JP
Priority date: 1989-07-29
Filing date: 1989-07-29
Publication date: 1991-03-25
Anticipated expiration: 2004-07-29
Also published as: JP2564100Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の常態における正面図、第２
図は拡径部削成時における正面図、第３図は第２
図−線における拡大断面図、第４図ａ，ｂ，
ｃはこの考案の動作説明図、第５図は従来の装置
の常態における正面図である。１…本体、２…シヤンク、３…取付け芯部、４
…拡径部削成刃体、５…板片、６…孔壁切削刃、
７…外殻体、８…ガイドヘツド、９…ガイド溝、
１０…楔状部、１１…係合スリーブ、１２…長孔
、１３…ピン、１４…規制スリーブ、１５…圧縮
ばね、１６…楔状部面、１７…当面。 Figure 1 is a front view of this device in its normal state, Figure 2
The figure is a front view when cutting the enlarged diameter part, and Figure 3 is the 2nd view.
Figure - Enlarged sectional view along the line, Figures 4a, b,
c is an explanatory diagram of the operation of this invention, and FIG. 5 is a front view of the conventional device in its normal state. 1...Body, 2...Shank, 3...Mounting core, 4
... Expanded diameter part cutting blade, 5... Plate piece, 6... Hole wall cutting blade,
7... Outer shell body, 8... Guide head, 9... Guide groove,
DESCRIPTION OF SYMBOLS 10... Wedge-shaped part, 11... Engagement sleeve, 12... Long hole, 13... Pin, 14... Regulation sleeve, 15... Compression spring, 16... Wedge-shaped part surface, 17... For the time being.

Claims

[Scope of utility model registration request]

An enlarged diameter section cutting blade is connected to the lower part of the main body which has a shank connected to the drive shaft at the upper part, and a pair of resilient plates provided in parallel to the lower part of the enlarged diameter section cutting blade are attached to the lower ends of the main body. A hole wall cutting blade is provided, a core is inserted from the enlarged diameter cutting blade to the lower part of the main body, a guide head is provided at the lower end of the core, and a guide head is provided on both sides of the guide head to match the width of the hole wall cutting blade. a wedge-shaped portion having downward and outward inclined surfaces on both sides by cutting a guide groove;
The hole wall cutting blade is made to face the wedge-shaped portion, the main body and the core body are connected so as to be movable within a predetermined range in the axial direction without rotation, and the wedge-shaped portion is inserted between both of the hole wall cutting blades. Then move the hole wall cutting blade into the guide groove, and in the final stage of protruding both hole wall cutting blades to the outside of the guide head, the hole wall cutting blade that slides into contact with the wedge-shaped part surface is brought into full contact with it for the time being. An apparatus for cutting an enlarged diameter part of a hole for anchor bolt installation, which is characterized by being designed.