Load-Carrying Device With Pivotable Spreader Legs
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Solution Overview
Problem
Existing load handling devices often damage wooden panel components during lifting due to inadequate attachment methods, and struggle with securely lifting heavy loads and loads with inclined surfaces.
Innovation Solution
A load-carrying device featuring a base element with a pull strap and pivotable spreader legs, connected via coupling elements, allowing for linear movement conversion into pivoting motion, with a locking mechanism to secure the load in various orientations, and a fastening interface for multiple devices to handle heavy and inclined loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional load handling devices are used to lift wooden panel components, then the lifting function is achieved, but the wooden panel components are damaged visibly from the outside
Solution Approach 1:
The spreader legs are nested within the base element in the retracted position, allowing the attachment device to be inserted into receiving openings without occupying excessive space. When activated, the spreader legs extend outward to engage with the load, providing secure attachment while maintaining a compact profile during insertion and transport.
Solution Approach 2:
The attachment device transitions from a static compact form to a dynamic extended form through the pull strap mechanism. The spreader legs are designed to pivot between retracted and extended positions, allowing the device to adapt its configuration based on operational requirements while minimizing damage risk during insertion.
2Reliability
If the pull tab is pulled to move the spreader leg into the spread position, then the attachment is secured to the load, but the mechanism becomes complex
Solution Approach 1:
The coupling element acts as an intermediary between the pull strap and the spreader leg, translating the linear pulling motion into rotational movement of the spreader leg. This intermediary mechanism simplifies the overall system by providing a straightforward motion conversion without requiring complex actuation systems.
Solution Approach 2:
The attachment device is designed to be self-actuating through the pull strap mechanism. When the pull strap is tensioned, it automatically drives the spreader legs into the engaged position through the coupling elements, eliminating the need for external actuators or complex control systems.
3Adaptability or versatility
If the spreader leg is pivotable between initial and spread positions, then the device can handle various load orientations, but the device complexity increases
Solution Approach 1:
The spreader legs are designed with pivotable joints that allow them to adapt to different load orientations and inclined surfaces. The dynamic positioning capability enables the attachment device to maintain secure engagement regardless of the load's orientation, while the pivotable design remains structurally simple.
Solution Approach 2:
The pivotable spreader legs provide universal adaptability to handle various load types and orientations, including inclined surfaces and vertical positions. This multi-functional capability is achieved through a relatively simple pivot mechanism that can accommodate multiple operational scenarios without requiring separate specialized components.
4Reliability
If a locking mechanism is added to secure the spreader leg in the spread position, then the attachment reliability is improved, but the device complexity and operation difficulty increase
Solution Approach 1:
The locking mechanism is designed to engage automatically when the spreader legs reach the engaged position. The geometry of the coupling elements and spreader legs creates a self-locking condition where the tension in the pull strap naturally maintains the locked position, eliminating the need for separate locking actions or complex control mechanisms.
Solution Approach 2:
The coupling element serves as an intermediary that not only transmits motion but also provides a locking function through its geometric design. The coupling element's shape and positioning create mechanical interlocking that secures the spreader leg in the engaged position while allowing simple release through pull strap tensioning.
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 device securely lifts wooden panel components without visible damage, handles heavy loads, and maintains attachment on inclined surfaces, ensuring reliable and efficient load handling.
Implementation Method 1
the pull strap being connected via a coupling element, for example via a coupling rod, is connected to the at least one spreader leg in such a way that the at least one spreader leg can be moved by moving the pull tab relative to the base element between the initial position and the spread position
Implementation Method 2
A load-carrying device featuring a base element with a pull strap and pivotable spreader legs, connected via coupling elements, allowing for linear movement conversion into pivoting motion, with a locking mechanism to secure the load in various orientations
Data Source
Figure 1
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AI summary
The invention relates to improvements in the technical field of load-handling devices. Among other things, a load-handling device (1) is proposed which has a movable pull tab (3) on a base element (2) and at least one spreader leg (4) movable between a starting position and an extended position on the base element (2). By pulling on the pull tab (3), the movement of the pull tab (3) is transmitted via a coupling element (5) to the at least one spreader leg (4), so that it can be moved from its closed starting position into an extended position, thereby anchoring the load-handling device (1) in a correspondingly designed insertion opening (9) of a load (10) to be lifted.