Elevator Forming Rail Reinforcement for Load Support
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Solution Overview
Problem
Conventional forming rails used in small capacity elevators are weak and unable to reliably support the load from the machine base, as they are further weakened by insertion holes for fastening tools, leading to reduced strength and increased manufacturing costs.
Innovation Solution
A machine base attachment device with a reinforcing body attached to the forming rail, featuring a groove portion and an insertion portion that enhances the structural integrity of the forming rail, allowing the machine base to be securely fixed to a reinforced section, thereby distributing the load effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a forming rail is used as the guide rail, then the weight and manufacturing cost are reduced, but the strength and load-bearing capacity are insufficient
Solution Approach 1:
The patent combines the forming rail (steel plate molded rail) with a reinforcing body to create a composite structure. The forming rail provides weight reduction and cost benefits, while the reinforcing body restores and enhances the load-bearing capacity, achieving a composite solution that balances weight and strength requirements.
Solution Approach 2:
The reinforcing body is strategically positioned at specific locations where the forming rail requires additional strength, particularly at the rail flange portion where the machine base is attached. This localized reinforcement maintains the overall lightweight design while providing targeted strength enhancement where needed.
2Ease of manufacture
If an insertion hole is provided in the rail flange portion for fastening the machine base, then the machine base can be fixed, but the strength of the forming rail is further reduced
Solution Approach 1:
The insertion hole is provided only in the reinforcing body, not in the forming rail itself. The reinforcing body acts as a local reinforcement plate that can accommodate fastening holes without compromising the integrity of the forming rail. This resolves the contradiction by enabling easy fixation through the reinforcing body while maintaining the strength of the original rail structure.
3Device complexity
If the machine base is fixed directly to the forming rail, then the structure is simple, but the load cannot be supported reliably
Solution Approach 1:
The attachment structure combines the forming rail with a reinforcing body to create a composite attachment system. This maintains relative simplicity while significantly improving reliability, as the reinforcing body provides the necessary load-bearing capacity for secure machine base fixation.
Data Source
AI summary
A machine base attachment device for an elevator hoisting machine includes a reinforcing body attached to a forming rail that guides movement of an elevating body, and a machine base fixing member that is fixed to a machine base for supporting a hoisting machine, and attached to the forming rail. The forming rail includes a pair of flange portions and a rail projecting portion fixed between the pair of flange portions. A groove portion that opens between the pair of flange portions is formed in the rail projecting portion. The reinforcing body includes an insertion portion that is inserted into the groove portion. The machine base fixing member is attached to a part of the rail projecting portion in which the insertion portion is inserted.