Saar Lagertechnik Roller Lanes: Components
The load-bearing roller
The axleless load-bearing roller consists of the tube and roller bottom groups, a simple screw serves as axle. The ball bearings are form-fitted in the roller bottom which in turn is fitted into the tube.
- Roller diameter 50mm, 60mm or 80mm depending on the application
- Thickness of the tube 1.5mm for rollers with a diameter of 50mm and 2mm for rollers with a diameter of 60mm for heavier duty
- Trimmed tube for perfect motion
- Steel Roller bottom for higher stability
- Screw connection with a screw with a 12mm diameter for heavier weights
- Blank steel finish for simple applications or electroplated for perfect appearance
- As an option the roller bottoms can be fitted with sealing caps to prevent dust or low pressure water getting in.
The roller track rail
The side rail is made galvanised rolled steel profile with a quality rating of St37.
- Thickness 3mm
- Height 80mm, width 40mm
- Hole spacing 26mm in the upper section and 52mm at the sides.
- Elongated holes at the sides make it possible to align the tracks accurately during installation.
- Very high precision
- An extra bend ensures more stability, with a factor of roughly 1.5 compared to ordinary profiles.
The brake-roller
Brake-rollers ensure controlled movement of pallets. They are set in the track in such a way that every pallet is in contact with a brake-roller at all times. Brake-rollers work on the gravity principle: the rotation of the load-bearing roller is developed at a ratio of 1:12 by means of a two-tier planetary gear. Rotatable brake-shoes with ball-bearings fitted to the exit side of the gear are pressed against the braking surface by the gravity resulting from rotation. The braking power depends on the downhill-slope force and thus on the weight of the pallet. Heavy pallets try to accelerate the brake-rollers more than light pallets. This increases the pressure of the braking weight and consequently the braking power. Pallets with different weights therefore move with the same speed of about 25cm/sec.
- Brake-rollers in direct contact to the goods being conveyed with very high efficiency
- Wearfree contact to the goods
- The top of the roller is about 1mm higher than the load-bearing roller.
- Thanks to the shape of the gear, the brake-roller can be built very quickly and placed in the divided unloading module.
Brake-roller fixture
The braking rollers are set in a special fixture.
- The height of the brake-roller is between 0.5mm and 1mm higher than the level of the neighbouring rollers.
- If pallets are transported sideways then the height difference is reduced to 0-0.5mm.
The separator
The separator separates the pallet that is ready to be removed from the pallets behind it, making unloading easier. Mechanical separators work in a very similar fashion.
- The pallet at the front accelerates for a moment and creates a gap between the pallets behind.
- It passes over a switch and presses it down.
- A rod (switch rod) transfers this movement to a stopper.
- The stopper moves out of its static position below the level of the rollers into the holding position about 15mm above the rollers. The pallet then halts at this stopper. The pallets behind remain at this stopper.
- The Saar Lagertechnik separators are constructed in such a way that the pressure from the remaining pallets is kept away from the separator paddle. A very light pallet can therefore not be lifted by high pressure frombehind.
- The first pallet can be lifted by up to 80mm during removal without unlocking the stopper
- The switch rod is either free of pressure ( separator with knee-lever version) or under pressure (the direct operating separator version), preventing the pressure from causing deformation.
Separator construction:
- Knee-lever separator separator for greater safety in manual or automatic installations
- Direct operating separator as a cost-effective solution with similar characteristics to manual installations
- Both the above versions can be fitted with a Hand/Foot release mechanism. The pallet is then released on instructions from the operator.
- Pneumatic or electric driven separator in manual or automatic installations, especially in despatch systems connected to automatic sky racks. The pallet can be released by the stock control computer.
- Separation rocker as a simple component with or without hand/foot release mechanism for order-picking installations
