Papua New Guinea Telescopic Dock Leveler
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Product Description
Telescopic Dock Leveler – Product Overview
Retractable fixed ramps (commonly referred to as retractable loading docks, retractable ramps, or hydraulic ramps) are essential equipment in logistics and warehousing loading and unloading operations.
Since “telescopic” and “fixed” represent two distinct installation configurations in industrial terminology (fixed installations are mounted on loading docks, while telescopic refers to platforms with a tongue that extends outward), in actual product nomenclature, “telescopic fixed leveling plate” typically refers to a hydraulic loading dock equipped with a telescopic tongue and mounted on a fixed loading dock.
This equipment is installed between the warehouse unloading dock (platform) and transport vehicles. A hydraulic system drives the main platform to rise and extends the tongue plate outward, which rests on the vehicle’s floor to form a ramp capable of supporting forklifts. It is specifically designed to address the height difference (±300 mm) and gap (typically ≥100 mm) between the loading dock and the truck bed, ensuring that forklifts can safely and efficiently enter and exit the truck bed for bulk loading and unloading operations.
Core Structure of the Telescopic Fixed Adjustment Plate
Main Platform (Main Deck): The steel plate that bears the main load of the forklift; it is typically made of high-strength, anti-slip checkered plate.
Extendable Tongue Plate (Lip Plate): Unlike traditional flip-type (overlapping) designs, this tongue plate is driven by a hydraulic cylinder to extend horizontally outward, resting directly on the floor of the cargo compartment rather than merely on the edge of the tailgate, providing a larger and more stable contact surface.
Hydraulic Power System: Comprised of a hydraulic power unit, main lifting cylinder, and telescoping cylinder, this system serves as the core power source.
Control Panel: Typically equipped with momentary-action push buttons or a pull-cord switch, allowing the operator to control the system directly from the forklift.
Safety Protection Devices: Includes maintenance support rods (safety locks), safety relief valves (which lock the platform in place in the event of a hydraulic hose rupture), and collision guards.
The Significant Advantages of the “Retractable” Type Over the “Folding” Type
Comparison Criteria | Retractable Adjustable Board | Traditional Flip-Up Tailgate |
Joining Method | The tongue extends horizontally, reaching 500–800 mm into the cargo compartment. | The tailgate flips up and then drops down, resting on the edge of the truck bed. |
Applicable Scenarios | Suitable for refrigerated trucks and box trucks (with bottom guide rails or when the cargo is stacked all the way to the rear, making it impossible to fold up the ramp). | Suitable for standard flatbed trucks or trucks with sufficient space at the rear. |
Safety and Stability | The contact surface rests on the floor panel, minimizing vibration from the forklift’s movement and reducing the risk of slippage. | Since it rests on the edge, it is prone to shifting (risk of unhooking) if the truck bed is deformed or when loading/unloading heavy cargo. |
Ease of Use | Precise positioning by reversing is not required; the system accommodates significant parking deviations (±100 mm lateral offset). | The vehicle must be parked with high precision; otherwise, the tailgate will not rest securely on the edge. |
Key Performance Parameters of Telescopic Fixed Adjustment Plates (Selection Guide)
When selecting a product, be sure to verify the following technical specifications:
Rated Load Capacity: Standard capacities are typically 6 metric tons, 8 metric tons, and 10 metric tons (dynamic load, i.e., the total weight of the forklift and cargo).
Platform Dimensions: Standard widths are typically 1830 mm, 2000 mm, or 2100 mm; lengths (main platform) are typically 2500 mm or 3000 mm.
Extension stroke: The extension length of the tongue plate generally ranges from 500 mm to 1,000 mm; this is the key indicator for determining whether the unit is a “telescopic” model.
Adjustment range: The height adjustment range of the loading ramp (the difference between the dock height and the truck bed height) is typically +300 mm / -300 mm (300 mm up, 300 mm down).
Power Supply: In China, 380V / 50Hz three-phase power is commonly used, though 220V is available upon customer request. The hydraulic motor power typically ranges from 1.1 kW to 1.5 kW.
Installation Requirements and Precautions
Civil Engineering Preparation: Fixed adjustment plates must be embedded in the concrete foundation pit of the loading dock. Before purchasing, confirm the loading dock height and foundation pit dimensions (manufacturers typically provide installation diagrams based on the model; the pit depth is generally between 550 mm and 650 mm).
Load-bearing Requirements: The front edge of the loading dock must be able to withstand the impact of a fully loaded forklift; the concrete strength grade at the bottom of the foundation pit is recommended to be no less than C30.
Drainage and Frost Protection: If installed outdoors, consider drainage for the foundation pit and the low-temperature flow properties of the hydraulic oil (low-temperature-resistant hydraulic oil must be used).
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Name: Amy
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