Automated Retractable Bumper for Loading Docks
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Solution Overview
Problem
Existing retractable bumper devices for loading/unloading docks require manual operator control, leading to safety issues due to potential forgetfulness and inefficiencies, as the bumper's deployment and retraction depend on visual observation and manual command.
Innovation Solution
An automated retractable bumper device that moves based on the open/closed state of the platform door and the presence/absence of a vehicle, using sensors like ultrasonic, optical, or contact sensors to determine safety conditions and control the bumper's position, ensuring it is deployed when a vehicle is present and retracted when not, thereby simplifying operations and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual operator control is used to deploy and retract the bumper, then the operator can visually observe vehicle presence and control the bumper position, but safety issues arise due to potential operator forgetfulness and inefficiencies occur
Solution Approach 1:
The bumper device automatically detects vehicle presence and autonomously deploys or retracts the bumper without requiring manual operator intervention. The system serves itself by using sensors to monitor conditions and actuators to execute bumper position changes, eliminating the need for operator memory and manual control while improving reliability.
Solution Approach 2:
The system continuously monitors vehicle presence using sensors (ultrasonic, optical, or contact sensors) and provides feedback to the control system. Based on this feedback, the control system automatically adjusts the bumper position, ensuring the bumper is deployed when a vehicle is present and retracted when absent, thereby improving safety and eliminating operator forgetfulness.
2Reliability
If the bumper is deployed to protect against vehicle shocks, then vehicle safety is improved, but the bumper may interfere with vehicle door opening or dock leveler positioning
Solution Approach 1:
The bumper is designed to be dynamically positionable rather than fixed. It automatically transitions between deployed and retracted positions based on real-time vehicle presence detection. When a vehicle is present, the bumper retracts to allow door opening and dock leveler positioning; when the vehicle is absent, the bumper deploys to provide protection against shocks.
3Reliability
If automated sensor-based control is implemented to determine bumper position, then operator error is reduced and safety is enhanced, but device complexity increases due to additional sensors and control systems
Solution Approach 1:
The control system is designed to support multiple sensor types (ultrasonic, optical, or contact sensors) that can perform the same function of detecting vehicle presence. This multi-functionality allows the system to achieve high reliability through automated control while managing complexity by providing flexibility in sensor selection and integration.
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
A retractable bumper device (1) for a dock installation (55) comprises a frame (5), a movable bumper (8) that can be moved relative to the frame (5) between retracted and extended positions, means for moving the bumper (8) between said positions, and means for controlling said means of movement. The bumper device (1) further comprises means for determining a safety condition to ascertain whether at least one safety condition, including the open/closed state of the dock door (3), is met, and said determination means are coupled to said control means so that the bumper (8) is placed in the extended position when the dock door (3) is closed, and in the retracted position when the dock door (3) is open.