Lateral Tarping Drive Rail Alignment Mechanism
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Solution Overview
Problem
Existing lateral covering/uncovering devices for loading boxes with upper loading openings face challenges in maintaining alignment of the winding/unwinding shaft during tarpaulin unwinding, leading to crabbing issues, which complicates operations and can hinder unloading, especially when cables or straps are used to prevent misalignment, causing obstacles and safety hazards.
Innovation Solution
The solution transforms the rotation of the winding/unwinding bar into a combination of rotational and translational movement using drive members that engage with drive rails, such as toothed wheels and racks or pinions, to maintain alignment without the need for recall cables or straps, allowing the drive rails to retract during unloading and preventing obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cables or straps are used to prevent winding/unwinding shaft crabbing, then alignment reliability is improved, but device complexity and safety hazards increase
Solution Approach 1:
The patent removes the cables or straps from the system entirely, replacing them with a guide rail mechanism that guides the winding/unwinding shaft along a predetermined path. This extraction eliminates the harmful factors (cables/straps) while maintaining alignment reliability through the guide rail structure.
Solution Approach 2:
The guide rail acts as an intermediary element between the winding/unwinding shaft and the box structure. Instead of using cables/straps to prevent crabbing, the guide rail provides a physical pathway that constrains the shaft to move only in the desired direction, thereby maintaining alignment without the complexity and safety hazards of cable systems.
2Reliability
If cables or straps are used to prevent misalignment, then alignment is maintained, but unloading operations are hindered due to obstacles
Solution Approach 1:
The guide rail is designed to be retractable or movable, allowing it to be positioned out of the way during unloading operations. This dynamic adjustment enables the system to maintain alignment reliability when needed while eliminating obstacles during unloading, thereby improving ease of operation.
Solution Approach 2:
The guiding function is segmented from the cable/strap system and integrated into the guide rail structure, which can be independently controlled to be present or absent from the unloading path. This segmentation allows alignment maintenance and unloading ease to be achieved at different times without compromise.
3Reliability
If manual intervention is used to realign the winding/unwinding shaft, then alignment can be restored, but time loss and operational efficiency decrease
Solution Approach 1:
The guide rail mechanism provides automatic alignment guidance for the winding/unwinding shaft, eliminating the need for manual intervention. As the shaft moves along the guide rail, it self-corrects any misalignment automatically, thereby restoring alignment reliability without time loss and improving operational efficiency.
4Device complexity
If the winding/unwinding shaft is allowed to crab during unwinding, then device complexity is reduced, but malfunction and operational difficulty increase
Solution Approach 1:
The guide rail serves as an intermediary that prevents crabbing without adding significant complexity to the system. By providing a simple physical guide structure, the patent maintains ease of operation while preventing the malfunctions associated with uncontrolled shaft movement.
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
This approach ensures reliable and efficient alignment of the winding/unwinding bar, simplifies the covering/uncovering process, and prevents obstacles that could hinder unloading, enhancing operational safety by eliminating the need for cables or straps across the box.
Implementation Method 1
drive members (22) capable of meshing respectively with two drive rails (23, 24) carried by the box (1), so as to allow, during the unwinding and winding operations of the tarpaulin (20), the transformation of the rotation of the winding/unwinding bar (21) into a combination of a rotational movement and a translational movement
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The loading container (1) is equipped with a tarpaulin covering/uncovering device (2), which includes a tarpaulin (20) attached to one (14) of the two side walls, and a winding/unwinding bar (21) attached to the tarpaulin. The winding/unwinding bar (21) can roll along the container in either direction between the two side walls (13, 14) of the container, between a first position in which the tarpaulin (20) is wound around the winding/unwinding bar (21) of the container, and a second position in which the tarpaulin (20) is unwound and covers the upper opening. The winding/unwinding bar (21) has a drive element (22) at each of its two ends (21a, 21b) not covered by the tarpaulin (20).The tarpaulin-laying/untarpaulin-laying device (2) comprises two drive rails (23, 24) which extend between the two side walls (13, 14) of the box, and which are adapted to be in contact with friction or to mesh respectively with the two drive members (22) of the winding/unwinding bar, so as to allow during the movement in one direction or the other of the winding/unwinding bar (21) between the first position and the second position, the transformation of the rotation of the winding/unwinding bar (21) into a rotational movement and a translational movement at each of the two ends (21 a, 21 b) of the winding/unwinding bar.