Title:
EXPANSION-TYPE ANCHOR, SLEEVE USED IN SAME, AND CONSTRUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/045348
Kind Code:
A1
Abstract:
Provided is an expansion-type anchor with excellent pull-out strength. The anchor comprises an anchor body 1 that has an expansion section 3 split by an inner slit 2, and a sleeve 9 to enclose and hold the expansion section 3 of the anchor body 1. The sleeve 9 is split into a plurality of follower expansion sections by an outer main slit 10 and an outer auxiliary slit 11. A group of balls 4 is disposed inside the anchor body 1, and the expansion section 3 expands into a tapered shape when the group of balls 4 is pressed by an expansion bolt 6. When a pull-out force is applied to the anchor body 1, the sleeve 9 does not retract and deforms by expanding after the retraction of the anchor body 1. As a result, the anchor body 1 is prevented from retracting by way of the sleeve 9 being sandwiched between a prepared hole 13 and the expansion section 3.
Inventors:
DOHI YUJI (CN)
HAMADA TOSHIJI (JP)
HAMADA TOSHIJI (JP)
Application Number:
PCT/JP2019/033322
Publication Date:
March 05, 2020
Filing Date:
August 26, 2019
Export Citation:
Assignee:
DOHI YUJI (CN)
International Classes:
E04B1/41; F16B13/04
Domestic Patent References:
| WO2016121993A1 | 2016-08-04 | |||
| WO2016121993A1 | 2016-08-04 |
Foreign References:
| JP2000230279A | 2000-08-22 | |||
| JPH0728259Y2 | 1995-06-28 | |||
| JP2015102166A | 2015-06-04 | |||
| JP2012082892A | 2012-04-26 | |||
| JPH0427209U | 1992-03-04 | |||
| JP2004218421A | 2004-08-05 | |||
| JP2017187069A | 2017-10-12 |
Other References:
See also references of EP 3845716A4
Attorney, Agent or Firm:
NISHI Hiroyuki et al. (JP)
Download PDF: