60-31G Thermo Ramsey Pull Rope Emergency Switch
(also known as 6031G Pull Cord Safety Switch )
Thero Ramsey Conveyor Pull Rope Emergency Switches are housed in a rugged die cast aluminum body and painted yellow.
The roller is built from stainless steel and has a 35mm diameter and length of 250mm. It is designed for use in heavy duty areas to maintain conveyor belt stop and prevent belts running out of alignment and causing damage to both the line and products.
The red steel roller of the switch is placed near to conveyor belt to pull the rope and stopping the belt.
The Rope Emergency Switch are mainly used in applications where it is necessary to protect personnel from dangerous devices , such as machines , conveyors and so on. They must be installed at all points accessible by the operator, usually on both sides along the entire tape, with a maximum distance of 50 meters between two subsequent switches, or 25 meters between a switch and a fixed point.
Thermo Scientific™ Ramsey™ Pro-line Conveyor Protection Switches enable position monitoring and the detection of potentially hazardous situations, triggering alarms and shutdowns to protect equipment and personnel. The range includes a Belt Misalignment Switch, Safety Cable Pull Switch and Tripper Position Switch. All are built to last with a rugged heavy-duty design; a modular, shared base unit simplifies installation and maintenance. Choose the Pro-line Conveyor Protection Switch you need to meet application and regulatory requirements for a dependable long-term safety solution that can help to prevent accidents, protect equipment, and reduce unscheduled shutdowns.
It ‘ consists of a external lever equipped with two pins to connect steel cords for remote operation of the switch from both sides.
When steel cords (on both sides) is pulled, the lever has a mechanical lock, manually resettable, by the external reset lever. This feature makes remote restarting impossible, thus eliminating the possibility of restarting the belt when people are locally working on the conveyor. The unit is equipped with N°2 microswitches operate at a 18° +/- 2° inclination of the external lever. Each microswitch is provide of: N°1 (NC) contact + N°1 (NO) contact. This devices is used for the safety of the operators on belt conveyors.
- Contacts: 2NC 2NO + Swith for Reset Lever
- Supply: 24V or 110V or 230V
- Indication: With or without LED
- Conduit Entry: M20 or 1/2″NPT fitting
- Operating Torque: 3.0 – 5.0Nm
- Warning Signal: 10 – 18 degrees
- Stop Initiated: 15-35 degrees
- Ingress Protection: IP67
- ATEX Versions Available
Conveyor Safety Pull Rope switches are mounted on both sides of the plant conveyors to protect against a hazardous situation caused by undesired movement. When the belt position slips or there is a dangerous situation for the workers, the steel rope connected to the handle of the switch is pulled and the system stops and safety is ensured.
They can be fitted along the length of the conveyor to ensure safety. All switches comply with European Standard IEC 60947-5-1 and provide positive working contacts at the trip point. They can be used to meet EN 620 requirements regarding conveyor control hazards from shifting belt position during operation. They are available in different types to provide heavy-duty performance and long life.
The steel cylinder of the switch is placed close to the edge of the conveyor belt such that deflection of the cylinder and lever will cause the internal contacts of the switch to “trigger” activation. Adjusting the opening angles and the required actuation torque are provided by the wrench.
The Rope Emergency Switch can only be used in control circuits.
For the correct operation of the emergency switches, use only accessories (steel cord, springs, helicoidal nut, etc..) original THERMO RAMSEY.
The use of accessories other than releases the manufacturer from any liability. 13 / 30 Cod.: PL-000603X-D002G 184.108.40.206. Steel Cord Installation: mechanical mounting
The correct installation of the steel cord, according to the directions set out below,” La corretta installazione della fune, in accordo con le indicazioni specificate di seguito, is a primary condition to ensure the proper functioning of the protection device.
The installation of the steel rope is by using a set of accessories described and listed below :
• Safety Spring (1): installed at the ends, are used to maintain tension in the steel rope, in step d ‘installation must be properly tensioned, to ensure that in case of breakage, the switch is pressed by the spring installed on the opposite side.
• Redance (2): installed near the springs of security needed to create the terminal loop of the rope, and allows the fixing of the rope by the steel cord clampe.
• Steel Cord Clamp (3): installed after the redance allow you to set the end of the rope made up the ring back.
• Helicoidal Nut (4): installed on the fixed points has the function to end support, installed at intervals of max. 3 mt. along the rope, serves to support the rope to avoid that the same goes slack.
• Red Steel Cord (5): The steel cord is flexible plastic, which is the element to operate the lever switch.
a) Fix the Rope Emergency Switch to the frame of the conveyor belt, through the holes provided on the basis of housing.
b)Instal the helicoidal nut (4) on a fixed support, the ends of the belt to be protected; this support can be constituted either by the frame of the conveyor belt is still installed by an external frame near the belt.
c) Engage the safety springs (1), places to tie the ends of the belt.
d) Instal the helicoidal nuts (4) at a maximum distance of 3 meters apart along the entire perimeter of the belt to be protected; Fixing can be done either by using the chassis of the belt (shoulder) or through external frame still installed at the perimeter of the belt. Take one end of the rope (5), and wrap on the redance (2), in order to create a kind of thin thread; ) Connect the two cables that were created together by clamps and tighten (3); during this leave about 280-300 mm of rope free that will be used later to limit the stretching of the safety spring (1) Attach the redance, one of the two safety springs (1) Attach the redance, placed at the ends of the belt. Lay out the rope (5) to reach the switch; during this attach the rope to the helicoidal nuts arranged as shown in d), so as to support the rope. i) Once you reach the switch, wrap the rope (5) around one of these two pins on the control lever. j) Tighten the rope, and tighten with a clamp (3). Ensure that the rope is properly tensioned and visible, and limit the elongation of the spring, as shown in figure 4-3-2-5, to a maximum length of 180 mm. l) If the switch is placed in central position to the perimeter to be protected, repeat all the steps indicated from the point
e) for the second half of the perimeter.
Housings: Die-cast painted yellow, or Stainless Steel 316. Roller Options: 35 x 120mm Short Roller 35 x 230mm Long Roller 50 x 170mm Medium Roller MINIATURE BELT ALIGNMENT SWITCHES Housings: Die-cast painted red or S/Steel 316.