Prefabricated Wall Railing Fixing Device with Embedded Cap
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Solution Overview
Problem
Existing methods for fixing railings on prefabricated walls are cumbersome, requiring drilling and the use of specialized equipment, are costly due to the need for chemical sealing, and result in visible traces that require additional, hazardous interventions for removal.
Innovation Solution
A fixing device comprising a socket, screw, and cap embedded within the prefabricated wall material, with a support system allowing precise positioning and reducing the size of the fixing elements to minimize the installation footprint and eliminate the need for post-installation trace masking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drilling is performed on the prefabricated wall to install fixing devices, then the railing can be securely fixed to the wall, but the operation becomes tedious and hazardous requiring specialized equipment and safety precautions
Solution Approach 1:
The fixing devices (sockets and screws) are pre-installed in the prefabricated wall during the wall manufacturing process. The cap is placed in the bottom of the mold to receive the screw head, creating a ready-to-use fixing system that eliminates the need for drilling and chemical sealing during railing installation.
2Reliability
If chemical sealing plugs are used to immobilize the fixing device in the wall, then the fixing becomes secure, but the cost increases significantly
Solution Approach 1:
The invention replaces expensive chemical sealing plugs with a simple cap that fits over the screw head. The cap is a low-cost element that provides sufficient immobilization of the fixing device in the wall without requiring costly chemical sealing materials.
3Adaptability or versatility
If the screw is removed to dismantle the guardrail, then the railing can be taken down, but visible traces remain on the wall requiring additional hazardous interventions
Solution Approach 1:
The cap serves as an intermediary element that covers the screw head and prevents visible traces from the fixing device. When the railing is dismantled and the screw is removed, the cap remains in place on the wall, concealing the hole and eliminating the need for additional cosmetic interventions.
4Reliability
If working at height is required for drilling and installing fixing devices, then the railing can be fixed to the wall, but safety risks increase and specialized equipment is needed
Solution Approach 1:
The fixing devices are pre-installed in the wall during manufacturing at ground level, eliminating the need for workers to drill and install fixtures while working at height. The railing installation can then proceed with simple mechanical insertion of screws into the pre-positioned sockets.
5Shape
If additional interventions are performed to mask traces on the wall, then the appearance is improved, but the process becomes more complex and hazardous
Solution Approach 1:
The cap acts as a permanent intermediary element that conceals the fixing device and eliminates visible traces on the wall. This single element replaces multiple cosmetic intervention steps that would otherwise be required to restore the wall appearance after railing removal.
Data Source
Figure 1
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Figure 4
AI summary
The device (1) has a set of fixing units (10, 10') that is arranged for fixing an object (2) i.e. guard rail, on a prefabricated wall (3). A placing unit (11) is arranged to place the set of fixing units to fix the object on the prefabricated wall at a given distance of a head (30) of the wall. A casing (100) is arranged along with a screw (102), and the head is equipped with an imprint for reception of an actuation tool. The head is screwed inside the casing. The head is intended to rest in a mold for manufacturing of the prefabricated wall. An independent claim is also included for a system for assembly of a guard body on a prefabricated wall of a building.