Pop-up single-side bolt fastener

Abstract

The invention discloses a pop-up single-side bolt fastener which is characterized in that a tail rod body of a screw rod is a threaded rod and a front rod body of the screw rod is a cylinder polish rod; a slot is arranged on the outer peripheral surface of the cylinder polish rod in a cross shape; a T-shaped cavity is arranged in the screw rod, a top plane of the T-shaped cavity is communicated with the slot on the same plane, a longitudinal axle hole in the T-shaped cavity starts from the top plane of the T-shaped cavity and extends and penetrates through the screw rod; a T-shaped rotation piece is configured in the T-shaped cavity, and each support block is embedded into the slot or protrudes out of the outer peripheral surface of the cylinder polish rod due to the rotation of a top rotation plate of the T-shaped rotation piece. The pop-up single-side bolt fastener can implement single-side fastening from one side and can be repeatedly used through a pop-up structure.

Description

technical field [0001] The invention relates to a bolt fastener used for unilateral installation in a workpiece, belonging to the technical field of construction engineering assembly. Background technique [0002] As far as the currently commonly used bolts are composed of a screw and a nut, when fastening a workpiece, it is necessary to insert the screw on one side and clamp the nut, and then tighten the nut with a tool on the other side. Workers need to work on both sides of the member at the same time, but in some occasions, such as closed-section members or members with inconvenient access to one side, this commonly used bolt encounters difficulties in use. For example: in the steel pipe concrete structure, at the joint of the beam column, because the column section is a closed section, ordinary bolts cannot be operated on both sides, so it cannot be installed. On the other hand, most of the unilateral bolts in the prior art have weak tensile strength due to the small a...

AI Technical Summary

Problems solved by technology

Workers need to work on both sides of the member at the same time, but in some occasions, such as closed-section members or members with inconvenient access to one side, this commonly used bolt encounters difficulties in use

For example: in the steel pipe concrete structure, at the joint of the beam column, because the column section is a closed section, ordinary bolts cannot be operated on both sides, so it cannot be installed

On the other hand, most of the unilateral bolts in the prior art have weak tensile strength due to the small anchorage area, and the reserved large holes severely weaken the section; moreover, the unilateral bolts in the prior art are no longer used in structures. time, it cannot be recovered and reused, resulting in waste of resources

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