One-Touch Rebar Coupler for Fast High-Strength Bar Joining
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Solution Overview
Problem
Existing rebar joining methods, such as lap splice and gas pressure welded joints, are prone to durability issues and increased construction time as structure height increases, especially when dealing with heavier or thicker rebars, due to their limited ability to provide a strong and stable connection.
Innovation Solution
A rebar coupler with a cylindrical housing, mounting members, resilient coupling members, and a cover that allows for one-touch connection of rebars, utilizing a resilient member to ensure secure engagement and prevent rebar displacement under tensile stress, with a threaded pattern and elastic contact surfaces for precise contact and increased friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mechanical joint devices are used to connect heavy or thick rebars, then connection strength is improved, but construction ability deteriorates and working time increases
Solution Approach 1:
The coupler is divided into multiple functional components: a housing that receives rebars, mounting members that secure the rebars, coupling members that slide along guide portions to engage the rebars, and a cover that seals the assembly. This segmentation allows each component to perform its specific function efficiently, enabling easy operation while maintaining strong connections for heavy rebars
Solution Approach 2:
The coupling members are designed to slide along the guide portions of the mounting members during the connection process. This dynamic movement allows the coupling members to automatically position themselves and engage with the rebars, simplifying the operation while ensuring a secure connection that can handle heavy or thick rebars
2Strength
If mechanical joint devices are used to connect heavy or thick rebars, then connection strength is improved, but working time required increases
Solution Approach 1:
The mounting members are pre-equipped with guide portions and the coupling members are pre-positioned within the housing. When rebars are inserted, the coupling members automatically slide along the guide portions and engage with the rebars in a predetermined sequence. This preliminary arrangement of components enables rapid connection without requiring complex manual operations, reducing working time while maintaining strong connections for heavy rebars
Solution Approach 2:
The coupling members are designed to automatically slide and engage with the rebars through the guide portions without requiring external assistance or complex manipulation. The resilient members provide automatic positioning and securing forces. This self-service mechanism significantly reduces the time and skill required for connection, enabling fast installation while ensuring strong connections for heavy or thick rebars
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and secure connection of rebars with reduced installation time and cost, providing a stronger connection than traditional methods, suitable for various rebar shapes and sizes, and applicable to other steel bars, ensuring stability under tensile and compressive stresses.
Implementation Method 1
a resilient member configured to apply a restoring force to the coupling members so that the coupling members slid by the rebar inserted in the mounting member are returned to an original position
Implementation Method 2
a plurality of coupling members slidably disposed on the mounting member and being brought into contact with an outer peripheral surface of the inserted rebars to prevent the rebars from moving out from the rebar coupler
Data Source
AI summary
Disclosed is a rebar coupler. The rebar coupler includes a housing having first and second openings for receiving first and second rebars, respectively, and a partition disposed at a center; a mounting member inserted in each end of the housing and receiving rebars therein; a plurality of coupling members slidably disposed on the mounting member and being brought into contact with an outer peripheral surface of the inserted rebars to prevent the rebars from moving out from the rebar coupler; a resilient member configured to apply a restoring force to the coupling members so that the coupling members slid by the rebar inserted in the mounting member are returned to an original position; and a cover fastened to both ends of the housing to prevent the mounting member and the coupling members from moving out from the housing due to a tensile force of the rebar.