Access Lock Control Element Prevents Simultaneous Bolt Locking
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Solution Overview
Problem
Conventional personnel locks can trap individuals if both bolts fall into their locking position simultaneously, especially during power failures, and existing solutions are complex and not easily retrofittable or adaptable for directional control.
Innovation Solution
A security gate design featuring a control element that prevents both bolts from falling into the locking position at the same time, allowing for modular retrofitting and directional control by using radially protruding locking and control cams, with bolts arranged to interact with different or the same cams based on angular distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both bolts are arranged to block movement in opposite directions, then the security gate can prevent passage in both directions, but there is a risk that both bolts may fall into locking position simultaneously trapping a person
Solution Approach 1:
A control element is introduced as an intermediary component between the two bolts. This control element has control surfaces that interact with the bolts to prevent them from both being in the locking position simultaneously. The control element mediates the interaction between the bolts, ensuring that when one bolt is locked, the other cannot be locked, thereby eliminating the trapping hazard while maintaining blocking reliability.
2Object-affected harmful factors
If the active surfaces are arranged on cams projecting radially from an axis of rotation with angular spacing, then simultaneous locking in both directions is prevented, but the construction becomes complex and not easily retrofittable
Solution Approach 1:
The control element is designed to be mounted on the carrier element and work universally with the existing bolt and cam mechanism. Rather than requiring a complete redesign of the locking mechanism, the control element integrates with the existing components, allowing the same basic structure to prevent trapping while maintaining simplicity and enabling retrofitting to conventional personnel locks.
3Object-affected harmful factors
If the control element is added to prevent simultaneous locking, then the security gate becomes safer, but the device complexity increases
Solution Approach 1:
The safety function is segmented into a separate control element rather than being integrated into the existing bolt or cam structure. This segmentation allows the control element to be added independently to provide the safety function of preventing simultaneous locking, while the original locking mechanism remains unchanged. The modular approach minimizes overall complexity by keeping the safety feature as a distinct, add-on component.
Data Source
Figure 1
Figure 2a~2d
Figure 3a~3c
AI summary
The invention relates to an access lock (50, 60) for the cyclical opening up of a passageway, with a movable support element (14), the movement of which is transmitted to an arrangement of locking elements (52, 62) which are movable by means of movement of the support element (14) within guide elements (54, 64), which delimit the passageway, wherein the support element (14) in each case has one or more first and active surfaces (18, 20) which face in opposite directions, and with a locking device for blocking the movement of the support element (14), said locking device having two bolts (22, 24) which are movable between a locking position and a release position, wherein a first of the bolts (22) in the locking position thereof, bears against the first active surface (18) or against one of the first active surfaces (18), and the second bolt (24), in the locking position thereof, bears against the second active surface (20) or against one of the second active surfaces (20). According to the invention, it is provided that a control element (32) is arranged on the support element (14), which control element is movable with respect to the support element (14) and in each case has one or more first and second control surfaces (36, 38) which are movable between a first and a second securing position by movement of the control element (32) with respect to the support (14), wherein, in the first securing position, the first control surface (36) or one of the first control surfaces (36) is arranged with respect to the first active surface (18) or with respect to one of the first active surfaces (18) in such a manner that the first bolt (22), in the locking position thereof, bears against the first control surface (36) while the second control surface (38) or one of the second control surfaces (38) protrudes over the second active surface (20) or one of the second active surfaces (20), thereby preventing movement of the second bolt (24) into the locking position thereof, and wherein, in the second securing position, the second control surface (38) or one of the second control surfaces (38) is arranged with respect to the second active surface (20) or with respect to one of the second active surfaces (20) in such a manner that the second bolt (24), in the locking position thereof, bears against the second control surface (38) while the first control surface (36) or one of the first control surfaces (36) protrudes over the first active surface (18) or one of the first active surfaces (18), thereby preventing movement of the first bolt (22) into the locking position thereof.