A structural post-pouring hole formwork auxiliary device

The auxiliary device for post-cast hole formwork designed with sleeve and winding components solves the problems of low construction efficiency and high cost of traditional formwork methods for reserved holes in floor slabs, achieving a fast and low-cost sealing effect and ensuring construction quality.

CN224514744UActive Publication Date: 2026-07-17CHINA HYDROPOWER ELEVENTH ENG BUREAU (ZHENGZHOU) CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA HYDROPOWER ELEVENTH ENG BUREAU (ZHENGZHOU) CO LTD
Filing Date
2025-06-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional formwork methods for pre-reserved openings in floor slabs are inefficient, costly, and involve a complicated construction process requiring multiple people to work together. They are also greatly affected by the location and height of the pre-reserved openings.

Method used

The structural post-cast hole support device, designed with a sleeve and winding assembly, uses the winding assembly to wind up the rope, which drives the top rod and support plate to move upward. The worm gear transmission is used to quickly seal the reserved hole. The support plate is equipped with a rubber pad to increase friction and sealing, preventing loosening and grout leakage.

Benefits of technology

It enables a single person to quickly seal pre-reserved holes in floor slabs, reducing construction costs, ensuring sealing quality, preventing grout leakage, simplifying construction steps, and improving construction efficiency.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224514744U_ABST
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Abstract

The utility model discloses a structure post -casting hole formwork supporting auxiliary device, including sleeve, sleeve inside slidingly connected with the jackscrew, the jackscrew is fixedly connected with the support plate on, is used for plugging the floor reserved hole, sleeve fixedly connected with the drawstring, the drawstring with the jackscrew away from the support plate one end corresponds, sleeve fixedly connected with the winding assembly, is used for winding the drawstring. Advantageous effects lie in: winding the drawstring through winding assembly, can drive the jackscrew to move upwards through the drawstring, drive the support plate to move upwards through the jackscrew, make the support plate contact with the roof, the reserved hole of plugging the floor, realize the quick preliminary winding of drawstring through the winding wheel, make the support plate quick rise to approach the roof position, utilize the worm and worm gear drive to carry out accurate tightening again, whole formwork supporting process operation is simple, need not complicated installation step and professional tool, and one person can complete quickly, and the construction cost is low.
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Claims

1. A structural post-pour hole formwork assistive device, characterized by: Includes a sleeve (1), a top rod (2) is slidably connected inside the sleeve (1), and a support plate (3) is fixedly connected to the top rod (2) for sealing the reserved hole in the floor slab; A pull rope (7) is fixedly connected to the sleeve (1), and the pull rope (7) corresponds to the end of the top rod (2) away from the support plate (3). A winding assembly (8) is fixedly connected to the sleeve (1) for winding the pull rope (7).

2. The structural post-installed hole formwork assisting device according to claim 1, characterized in that: A rubber pad (5) is fixedly connected to the support plate (3).

3. The structural post-installed hole formwork assisting device according to claim 1, characterized in that: The sleeve (1) is rotatably connected to a base (4) at the end away from the support plate (3), and a handle (6) is fixedly connected to the sleeve (1).

4. The structural post-installed hole formwork assisting device according to claim 1, characterized in that: The sleeve (1) has two corresponding strip openings (10), the top rod (2) is fixedly connected to a guide wheel (9), and the pull rope (7) passes through the guide wheel (9).

5. The structural post-installed hole formwork assisting device according to claim 1, characterized in that: The top rod (2) is rectangular and has a clearance fit with the inner wall of the sleeve (1).

6. The structural post-installed hole formwork assist device according to claim 1, wherein: The winding assembly (8) includes a winding reel (13), a mounting bracket (11) is fixedly connected to the sleeve (1), a rotating shaft (12) is rotatably connected to the mounting bracket (11), the winding reel (13) and the worm gear (14) are fixedly connected to the rotating shaft (12), a moving assembly (16) is fixedly connected to the sleeve (1), a mounting bracket (17) is fixedly connected to the moving end of the moving assembly (16), a worm (18) is rotatably connected to the mounting bracket (17), and the worm (18) meshes with the worm gear (14).

7. The structural post-installed hole formwork assist device according to claim 6, wherein: A crank handle (15) is fixedly connected to the rotating shaft (12).

8. The auxiliary device for formwork support of post-cast holes according to claim 7, characterized in that: The movable component (16) includes a fixed plate (20), which is fixedly connected to the sleeve (1). A guide rod (21) is slidably connected to the fixed plate (20). The end of the guide rod (21) is fixedly connected to the second mounting bracket (17). A bolt (22) is threadedly connected to the fixed plate (20), and the end of the bolt (22) is rotatably connected to the second mounting bracket (17).

9. The auxiliary device for formwork support of a post-cast hole according to claim 8, characterized in that: A crank handle (19) is fixedly connected to the end of the worm (18).

10. The structural post-installed hole formwork assist device according to claim 3, wherein: The pull rope (7) and the winding assembly (8) are both fixedly connected to the end of the sleeve (1) away from the base (4).