Pull Door Opening Device With Wedging Upper Support
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Solution Overview
Problem
Existing door opening devices are ineffective for 'pull' doors, as they lack the necessary upper support mechanism to exert a thrust effectively, resulting in slower and less efficient door opening compared to 'push' doors.
Innovation Solution
A door opening device with a hydraulic jack, intermediate sole, and upper support bar, featuring a wedging and blocking mechanism that includes a front flat part, raised part, and rear part, which can be articulated to fit into a slot between the door frame and upper end of the door, providing the necessary thrust and support to open 'pull' doors by leveraging the door's frame and partition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standard door opening device with upper support bar is used, then it can effectively open push doors by leveraging the door frame, but it cannot effectively open pull doors because the upper support bar has no surface to rest against on the exterior side of the door
Solution Approach 1:
The upper support device is segmented into multiple functional parts: a front flat part for insertion into the slot between door frame and upper end, a raised part extending vertically to contact the partition above the frame, and a rear part with articulation means. This segmentation allows each part to perform a specific function in the overall door opening process.
Solution Approach 2:
The upper support device acts as an intermediary mechanism between the upper support bar and the door frame structure. It transfers and redirects the thrust force from the jack through the raised part to the partition above the frame, enabling effective door opening without direct contact between the support bar and the door frame.
2Force
If thrust is applied centrally at mid-height of the door, then it can depress the door effectively, but without upper restraint the door can fully retract from the frame reducing thrust effectiveness
Solution Approach 1:
The raised part of the upper support device provides preliminary counter-action by contacting the partition above the door frame before the door fully retracts. This prevents excessive door retraction and maintains thrust effectiveness throughout the door opening process, eliminating the need for repeated thrust applications.
Solution Approach 2:
The solution moves from a single-point central thrust application to a distributed force system involving vertical thrust at mid-height and vertical restraint at the upper end. This dimensional change in force application creates a more effective mechanical advantage for door opening.
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 enables rapid and efficient opening of 'pull' doors by exerting a thrust of at least 50 kN, utilizing the wedging and blocking mechanism to prevent the door from fully retracting from its frame, ensuring effective counter-leverage and maintaining the door's frame integrity.
Implementation Method 1
a jack, preferably hydraulic
Implementation Method 2
exerting a thrust on the vertical surface of the door and pushing it down
Implementation Method 3
a front flat part capable of being introduced into a slot between the frame of the door and the upper end of the door
Implementation Method 4
providing the necessary thrust and support to open 'pull' doors by leveraging the door's frame and partition
Data Source
Figure 1A~1B
Figure 1C
Figure 2
AI summary
The invention relates to a device for opening a pull door by sinking, capable of applying a pressure on the vertical surface of the wall and of making it sink when the device is placed against the door on the side on which it opens when pulling, comprising a cylinder, an intermediate sole (6) and an upper bearing bar (7), characterized in that it comprises an upper bearing device (11) hinged to the upper end of said upper bearing bar (7), comprising at least one setting and locking part (12) defining: a front planar portion (12a) that can be inserted into a slot (3a) between the door frame (2) and the upper end (3i) of the door (3); a raised portion (12b) extending in a longitudinal direction YY' perpendicular to said front planar portion (12a) and above the latter; and a rear portion (12c) located at the base and at the back of said raised portion and under the face of which a fixation member (12d) enables the rotational hinging of said setting and locking part (12) relative to the upper end of said upper bearing bar (7).