Connecting structure for concrete block and connector used therefor

A connector for connecting a first precast concrete block and a second precast concrete block to each other, comprising:

• a first connecting rod adapted to be buried in the first block and arranged so that an external threaded portion provided at an end thereof is exposed;
• a second connecting rod adapted to be buried in the second block and arranged so that an external threaded portion provided at an end thereof is exposed;
• a cylindrical first tightening member having an insertion hole at one end thereof to allow the first connecting rod to be loosely inserted into the insertion hole at the one end, said first tightening member including an external threaded portion at an outer surface thereof, said first tightening member being disposed on the first connecting rod in a state where the end of the first connecting rod is inserted into the insertion hole;
• a first nut screwed onto the external threaded portion of the first connecting rod after the first tightening member is disposed on the first connecting rod, said first nut for limiting the first tightening member movement in a direction toward the end of the first connecting rod;
• a cylindrical second tightening member having an insertion hole at one end thereof to allow the second connecting rod to be loosely inserted into the insertion hole at the one end, said second tightening member including an internal threaded portion to allow the external threaded portion of the first tightening member to be screwed into the internal threaded portion, said second tightening member being disposed on the second connecting rod in a state where the end of the second connecting rod is inserted into the insertion hole;
• and
• a second nut screwed onto the external threaded portion of the second connecting rod after the second tightening member is disposed on the second connecting rod, said second nut for limiting the second tightening member movement in a direction toward the end of the second connecting rod.

In combination,

• a first precast concrete block;
• a second precast concrete block;
• a first connecting rod buried in the first block so that an external threaded portion at an end thereof is exposed;
• a second connecting rod buried in the second block so that an external threaded portion at an end thereof is exposed;
• a first cylindrical tightening member having a first insertion hole arranged at the center thereof so the first connecting rod is loosely inserted into the first insertion hole of said first tightening member, said first tightening member including an external threaded portion at an outer surface thereof;
• a first nut screwed onto the external threaded portion of the first connecting rod, said first nut limiting the first tightening member movement in a direction toward the end of the first connecting rod;
• a second cylindrical tightening member having a second insertion hole arranged at one end thereof so the second connecting rod is loosely inserted into the second insertion hole of the second tightening member, said second tightening member including an internal threaded portion on an inner surface thereof, said external threaded portion of the first tightening member being screwed into the internal threaded portion of the second tightening member;
• and
• a second nut screwed onto the external threaded portion of the second connecting rod, said second nut limiting the second tightening member movement in a direction toward the end of the second connecting rod,
• the external threaded portion of the first tightening member being tightened into the internal threaded portion of the second tightening member, the first connecting rod and the second connecting rod being pulled toward each other so the first and the second blocks abut.

A connector for connecting a first precast concrete block and a second precast concrete block to each other, comprising:

• a first connecting rod adapted to be buried in the first block and arranged so that an external threaded portion provided at an end thereof is exposed;
• a second connecting rod adapted to be buried in the second block and arranged so that an external threaded portion provided at an end thereof is exposed;
• a first cylindrical tightening member having a first insertion hole at the center thereof to allow the first connecting rod to be loosely inserted into the first insertion hole of said first tightening member, said first tightening member including an external threaded portion at an outer surface thereof, said first tightening member being disposed on the first connecting rod in a state where the end of the first connecting rod is inserted into the first insertion hole;
• a first nut screwed onto the external threaded portion of the first connecting rod after the first tightening member is disposed on the first connecting rod, said first nut being arranged for limiting the first tightening member movement in a direction toward the end of the first connecting rod;
• a second cylindrical tightening member having a second insertion hole at one end thereof to allow the second connecting rod to be loosely inserted into the insertion hole of said second tightening member, said second tightening member including an internal threaded portion on an inner surface thereof to allow the external threaded portion of the first tightening member to be screwed into the internal threaded portion of said second tightening member, said second tightening member being disposed on the second connecting rod in a state where the end of the second connecting rod is inserted into the second insertion hole;
• and
• a second nut screwed onto the external threaded portion of the second connecting rod after the second tightening member is disposed on the second connecting rod, said second nut being arranged for limiting the second tightening member movement in a direction toward the end of the second connecting rod.