| 发明名称 |
METHOD FOR FORMING ANCHOR HOLE AND DIAMETER EXPANSION DEVICE |
| 摘要 |
To provide a method for forming an anchor hole and a diameter expansion device by which a centrifugal force can be appropriately adjusted when a cutting-blade portion is moved in a radial direction by the centrifugal force to grind a diameter expansion portion. In a method for forming an anchor hole for a post-installed anchor in which a diameter expansion drill bit is inserted and rotated in a prepared-hole portion bored in a concrete fixing body and a cutting-blade portion of the diameter expansion drill bit is moved in a radial direction by a centrifugal force to grind a part of the prepared-hole portion to form a diameter expansion portion, the minimum value of the centrifugal force applied to grind the diameter expansion portion is 0.75 N and preferably 1.1 N. |
| 申请公布号 |
US2017036373(A1) |
申请公布日期 |
2017.02.09 |
| 申请号 |
US201515304294 |
申请日期 |
2015.10.08 |
| 申请人 |
FS TECHNICAL CORPORATION |
发明人 |
FUJITA Shogo |
| 分类号 |
B28D1/14;B24B33/08;B23B51/00;B24B23/02 |
主分类号 |
B28D1/14 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for forming an anchor hole for a post-installed anchor in which a diameter expansion drill bit inserted in a prepared-hole portion bored in a concrete fixing body is rotated and a cutting-blade portion of the diameter expansion drill bit is moved in a radial direction by a centrifugal force to grind a part of the prepared-hole portion to form a diameter expansion portion, wherein
a minimum value of the centrifugal force applied to grind the diameter expansion portion is 0.75 N. |
| 地址 |
Tokyo JP |
