Rope Gripper

Rope Gripper

Rope Gripper is responsible
for the safety of our customers.

Rope Gripper ™ is an over speed protection device that protects passengers from the risk of injury due to failure of the brake control system of the elevator, breakdown of the brake, and failure of the component that determines the car speed in the ascending or descending direction. If the elevator car door is open due to slipping or if it exceeds the rated speed, it will stop the car safely by catching the main rope of the elevator when sudden rise or fall.

Division Rope Gripper Model
#620 #622 #624 #626 #626-SPL
Common Maximum Raitings
(Max. Out to Out of Cables)
124mm 152mm 254mm 254mm 349mm
Power Supply 6A, 120V AC, 1PH, 60HZ
Contact Ratings 6A, 120V AC, 0.15A, 250 DC

1:1Roping

Maximum Raitings Rated Speed 106m/min 183m/min 366m/min
Rope Gripper
(Rope Gripper Tripping Speed)
122m/min 210m/min 417m/min
Car Rated Load
(With 40 to 50% Counterweight)
1,134kg 2,268kg 4,536kg
Car, Car Load,
Counterweight, Hoist and
Compensation Rope Mass
5,216kg
8,437kg
17,236kg
Door Zone 254mm
Min. Car Rated Load 272kg 680kg 1,134kg
Car & Counterweight Mass 1,034kg 2,722kg 3,629kg

2:1Roping

Maximum Raitings Rated Speed 76m/min 122m/min 244m/min
Rope Gripper Tripping Speed 92m/min 140m/min 280m/min
Car Rated Load
(With 40 to 50% Counterweight)
2,268kg 4,536kg 9,072kg
Car, Car Load,
Counterweight ,Hoist and
Compensation Rope Mass
10,433kg 17,236kg 34,472kg
Door Zone 254mm
Min. Car Rated Load 680kg 1,134kg 2,268kg
Car & Counterweight Mass 2,722kg 3,629kg 7,258kg
Weight after carton box packaging 48kg 65kg 129kg 135kg 157kg

When ordering a rope gripper, please describe the following in detail.
Main rope maximum width at both ends, main rope number and diameter, whether 1: 1 or 2: 1 roping, rated speed, loading load, and weight of counter weight, total load

Main Parts Name

Rope Gripper

Gripper Unit


Rope Gripper
Rope Gripper

Pumping Unit


Rope Gripper
Rope Gripper

01

Using a spring moving along the fixed cam

It has the mechanical advantage of using a spring that moves along the fixed cam, so it can grab the main rope strongly but smoothly so that excessive pressure or damage can not be applied to the main rope of the elevator without modifying the machine or hoisting machine sheave or other devices.

02

It is possible to prevent accidents when the slipping phenomenon of the traction machine occurs.

When the slipping phenomenon of the traction machine occurs, the accident can be prevented. This cam action is designed to compensate for lining wear and spring drooping so that constant pressure is applied to the elevator rope, even if the spring force is reduced to less than half the original.


Stage 1
When the gripper unit is open, the spring is fully compressed and the magnetized solenoid trigger device keeps the spring from being inflated.

As a result, the movable shoe is widened at regular intervals to move the main rope naturally.
Stage 2
If an emergency occurs in which the door of the elevator is out of the door zone and when the speed or elevator door is open, the contact of the elevator controller cuts off the electricity supplied to the solenoid to release the trigger device. If electricity is not supplied to this solenoid and the magnetizing force is lost, the spring expands to brake the rope and the flow control plate moves.

When the spring expands, the oil inside the cylinder smoothly returns to the tank, allowing shock protection.
Stage 3
In order to reset the Rope Gripper again while the Rope Gripper is activated with holding the rope, the contact of the Elevator Controller must first be closed when all signals are normal to all signals. This will supply electricity to the pump motor and the electrical trigger solenoid at the same time.

At this time, the hydraulic valve is closed, the oil is pumped into the cylinder, and the piston of the cylinder returns, consequently the spring is compressed along the cam's motion curve.

When the rope gripper is fully returned to the standby state again, the microswitch will stop the pump motor and the electro solenoid will hold the spring in place. The contact of the rope gripper is also closed indicating that the elevator is ready for operation.

Even when the power is turned off, the system returns automatically to the same status. If you want to operate in the return state in case of power failure, you can make the return state by operating the hydraulic pump manual pump rod.
Reference
When the lining of the braking plate wears due to excessive use of the rope gripper in an abnormal state, the shaft moves to the vicinity of the upper end of the cam when the spring expands to operate the microswitch, thereby this will prevent the rope gripper from being reset, and stop the elevator until it is replaced or readjusted.

Even though the lining is worn out and the shaft rises along the cam and the spring force weakens, the lining that brakes the rope due to the mechanical characteristics of the cam structure is designed to apply a constant resultant force.

Obtained CSA quality certification

Successful localization from Hollister-Whitney with quality certified products from CSA and supply at practical price

Field installed pictures

  • Geared

    Geared

  • Gearless

    Gearless

  • MRL

    MRL

Projects



Gum Young General Co.,Ltd. / GYG ELEVATOR Co.,Ltd.
336, Hakdong-ro, Gangnam-gu, Seoul, Republic of Korea   TEL:82-2-3442-1117  FAX:82-2-540-5007
COPYRIGHT ⓒ 2019 GUMYOUNG GENERAL / GYG ELEVATOR CO., LTD. ALL RIGHTS RESERVED