[Patent Granted] Method for Forming Through Holes in Concrete Structures

Introducing patented technology that enables the provision of exterior material retaining components with excellent reusability.

The main objective of the present invention is to enable the formation of through holes of various lengths in concrete structures using low-cost materials, and to provide a skin material holding member that has good reusability. When attaching the through hole forming device to the formwork, the support rod is rotated. This causes the threaded expansion section to extend and brace, with the sharp ends at both ends biting into the formwork material and becoming fixed. After that, a base member is attached to both ends and the center of the support rod, and a semicircular outer shell member is further attached from the outside, thereby forming the core body. In this state, pouring concrete into the formwork allows for the formation of through holes. 【Features】 ■ By viewing through the through hole, it is possible to accurately position the main body at a predetermined location on the formwork material. ■ A simple configuration that makes it easy to position the skin material holding member can be provided. ■ It is possible to attach the skin material holding member to the formwork material using low-cost generic products. ■ The work of attaching to the skin material holding member is easy, and after forming the through hole in the concrete, it is possible to easily peel off the skin material from the inside. Patent Registration Number: 4342606 *For more details, please visit our website or feel free to contact us.

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