Due to the many differences in hoist design, there is no absolute method or standard position for installing the unit. The installer must determine the mounting and positioning.

• For TROLLEY DIRECTION – Normally installation of the HSPD (Hoist Side Pull Detector) is to prevent the hook from being pulled sideways across the drum face (Trolley direction). The most common abuse of the hoist occurs when the operator does not center the hoist over the load and pulls the hook sideways to the load and then hoists in the up direction. In this scenario, the action of pulling the rope sideways will cause the switch in the Industry Solutions® HSPD to close and signal a cut off of the hoisting motion. The operator is then forced to center the hoist over the load properly. The HSPD will then reset, and hoisting can begin again. Pulling the rope across the drum is normally the worst case scenario as it results in damage to the rope and rope drum; can cause the rope to jump out of its grooves as well as damage to other structures in the hoist such as rope guides (expensive repairs!) and bearings.
• For BRIDGE DIRECTION – An alternative geometry is that of the HSPD being set in the bridge travel direction. An example of this would be of a crane operator “dragging” loads out of a furnace using the bridge motion (not good practice). By mounting the unit sideways (to trip in the bridge direction) where the hook is in line with the drum, the HSPD could be wired to cut out the bridge travel motion in the offending direction. The opposite direction would then be used to center the hoist over the load thereby encouraging proper use of the hoist which can dramatically decrease service and other issues.

MOUNTING AND ADJUSTMENT

The Industry Solutions International, Inc.® HSPD (Hoist Side Pull Device)  must be mounted in such a way that the arm of the unit hangs down in line with a hoist’s stationery (dead end) rope. This normally entails welding or screw mounting of the mounting plate which the body of the HSPD device is connected. The rope guide (see different model numbers for the correct unit) can then be attached around the rope. Various adjustments are available on the HSPD. Mounting must be done so that the arm of the device can move freely with the rope. The arm is hinged and will move in 4 directions. It is the installer’s decision how to position and mount the device. Various hoists have different possibilities.

The arm is connected to a swivel block which activates the internal switches when excessive side-pulling is detected. The electrical switches are easily adjusted by the installer until the desired radius of allowable pulling angle is exceeded and thus tripped. The switches are locked into place by tightening of a set screw.

Adjustable allen screws are on the body of the Hoist Side Pull Device and limit the travel of the swivel block after the switch positions have been set. These allen screws are adjusted and locked so that once the swivel block has activated the internal switches the hoist up movement stops. Of course, lights or alarms can also be activated.

TIME DELAY CONTROLLER AND ALARM PANEL

A controller which is added to the hoist control panel and includes left and right motion adjustable timers (typically set about a 1-second delay) for motion cutout. It is used in the control panel with a pendant (or radio) connection. It also includes relay connections for alarms or lights to be added if required. You may refer to the attached electrical drawing in this document or the 2018 ISI catalog. It is possible to utilize the HSPD without the controller for instantaneous cut-out but without any provision for timers or alarms (call for information if required).