Construction Prop Foot Reinforcement with Tangential Creases
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Solution Overview
Problem
Construction props suffer from dent formation when removed, leading to hindered telescopic movement and increased weight due to traditional reinforcement methods, and are susceptible to deformation under perpendicular loads due to axial profiling.
Innovation Solution
A construction prop with a foot reinforcement featuring tangential creases around the outer pipe's circumference, which are formed through plastic deformation and extend from the lower end over 10-50 cm, providing a wave-shaped cross-sectional profile that enhances resistance to deformation and dent formation without increasing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a steel protective sleeve is provided over the lower end of the outer pipe to prevent dent formation, then the resistance to dent formation is improved, but the weight of the construction prop increases
Solution Approach 1:
The patent applies local quality by providing reinforcement only at the lower end of the outer pipe where dents are most likely to form during removal, rather than reinforcing the entire pipe. The creases are concentrated in the foot region, giving localized protection while keeping the rest of the pipe lightweight.
Solution Approach 2:
The patent uses curvature by forming creases in the pipe wall that create a wave-shaped cross-sectional profile. These creases follow the curvature of the pipe and extend tangentially around the circumference, distributing impact forces along the curved surface rather than creating rigid flat reinforcement.
2Ease of operation
If axial profiling is provided in the outer pipe to prevent dents from hindering telescopic movement, then the ease of telescopic movement is improved, but the outer pipe becomes susceptible to squashing under perpendicular loads
Solution Approach 1:
The patent applies asymmetry by creating creases with different characteristics on different sides of the pipe. The creases extend tangentially around the circumference rather than axially, creating an asymmetric pattern that allows telescopic movement while maintaining structural integrity against perpendicular loads.
Solution Approach 2:
The patent transitions from axial profiling (one-dimensional along the pipe length) to tangential creases (extending around the circumference in a different dimension). This dimensional change allows the creases to follow the pipe's curvature and provide protection without creating weak points susceptible to squashing.
3Strength
If the outer pipe is provided with creases through plastic deformation to create foot reinforcement, then the resistance to dent formation is improved without weight increase, but the manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by forming the creases during the pipe manufacturing process through plastic deformation, rather than adding reinforcement components after the pipe is made. This preliminary formation of the reinforced structure simplifies the overall manufacturing process.
Solution Approach 2:
The patent uses self-service by allowing the pipe material itself to provide the reinforcement through controlled plastic deformation. The pipe wall is reshaped to create the crease pattern, using the material's own properties to provide reinforcement without requiring additional materials or complex assembly steps.
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
The tangential creases reduce the risk of squashing and allow unhindered telescopic movement even with dents, maintaining structural integrity and ease of manipulation without weight increase.
Implementation Method 1
the tangential creases are provided through plastic deformation of the pipe wall
Data Source
Figure 1~1A
Figure 2~3
Figure 4~5
AI summary
A construction prop provided with an outer pipe with a longitudinal central axis, a foot at a lower end of the outer pipe, a screw thread adjacent an upper end of the outer pipe, two slotted holes which are located at the screw thread and which extend in a direction parallel to the longitudinal central axis and which are provided diametrically relative to each other in the outer pipe, wherein an inner pipe which is slideably received in the outer pipe and is provided with a series of pairs of holes arranged over a part of the length of the inner pipe, wherein the two holes of each pair of holes are disposed diametrically relative to each other in the inner pipe, wherein the outer pipe comprises a foot reinforcement which is provided with a number of grooves which each extend in tangential direction around the entire circumference of the outer pipe, wherein each groove extends in an imaginary plane which extends perpendicularly to the longitudinal central axis.