초록 ▼

The invention is directed to an anchoring bolt device for insertion into a material having a predrilled bore formed therein. The anchoring bolt device includes a sleeve-like body defining a longitudinal axis and having an upper portion, a mid portion and a lower portion having a bottom end face defi

The invention is directed to an anchoring bolt device for insertion into a material having a predrilled bore formed therein. The anchoring bolt device includes a sleeve-like body defining a longitudinal axis and having an upper portion, a mid portion and a lower portion having a bottom end face defining an opening. The body has a bore formed therein so as to extend along the axis and through the upper portion and the mid portion. A passage is formed in the lower portion of the sleeve-like body and extends from the bore and along the axis to terminate in the opening formed in the end face. The passage has a tapered inner wall surface so that the diameter of the passage becomes narrower toward the bottom end face. The lower portion of the sleeve-like body is partitioned into a plurality of legs extending in the direction of the axis. A ball is disposed in the bore so as to rest against the tapered inner wall surface and a thread is formed in the bore so as to extend along the upper portion. A fixing bolt threadably engaging this thread extends downwardly into the bore so as to be in contact engagement with the ball. The fixing bolt is rotatable so as to be displaceable along the axis between a first position wherein the ball is resting on the tapered inner wall surface and a second position wherein the bolt imparts a thrust force to the ball so as to cause the ball to press downwardly against the tapered inner wall surface thereby causing the legs to move outwardly in a direction radially of the axis and press tightly against the wall of the predrilled bore to anchor the sleeve-like body therein.

대표청구항 ▼

An anchoring bolt device for insertion into a material having a predrilled bore formed therein, the anchoring bolt device comprising: a sleeve-like body defining a longitudinal axis and having an upper portion, a mid portion and a lower portion having a bottom end face defining an opening; said body

An anchoring bolt device for insertion into a material having a predrilled bore formed therein, the anchoring bolt device comprising: a sleeve-like body defining a longitudinal axis and having an upper portion, a mid portion and a lower portion having a bottom end face defining an opening; said body having a bore formed therein so as to extend along said axis and through said upper portion and said mid portion; said lower portion having a passage formed therein along said axis to terminate in said opening; said opening having a diameter less than the diameter of said bore; and, said passage being defined by an inner wall surface extending from said bore and tapering downwardly to said opening; partition interface means formed at least in said lower portion for partitioning said lower portion into a plurality of legs extending in the direction of said axis; a ball disposed in said bore so as to rest against the tapered inner wall surface; a thread formed in said bore so as to extend along said upper portion; a fixing bolt threadably engaging said thread and extending downwardly into said bore so as to be in contact engagement with said ball; said fixing bolt being rotatable in said thread so as to be displaceable along said axis between a first position wherein said ball is resting on the tapered inner wall surface and a second position wherein said bolt imparts a thrust force to said ball so as to cause said ball to press downwardly against said tapered inner wall surface thereby causing said legs to move outwardly in a direction radially of said axis and press tightly against the wall of the predrilled bore to anchor said body therein; said bore having a first diameter and said ball having a second diameter less than said first diameter; and, said thread having an inner diameter less than said second diameter thereby trapping said ball in said bore.