Device and method for preventing vertical displacements and vertical vibrations of the load carrying means of vertical conveyors
AssigneeInventio AG
InventorClaudio De Angelis
Life of this patent
Estimating the term…
Abstract
A braking device for load carrying cars in vertical conveyor installations with elastic suspension apparatus holds fast to guiderails to prevent vertical displacements and vertical vibrations while stopped at landings. The braking device contains integrated sensors for registering the holding forces occurring between the load carrying car and the guiderails. Before travel of the car continues, the signals from these sensors enable a drive regulator to adjust via a drive unit the tensile force in the suspension apparatus carrying the car in such a manner that the braking device is relieved and can be opened without generating a jerk on the load carrying car.
Claims12
A braking device for preventing vertical displacements and vertical vibrations of load carrying means of vertical conveyors while stopped at landings, the load carrying means being supported by elastic suspension means, comprising:
- a casing for mounting on a load carrying means;
- a pair of brake arms;
- means for selectively moving said brake arms into and out of engagement with a guiderail;
- and
- load sensing means coupled to said brake arms whereby when said casing is mounted on a load carrying means adjacent a guiderail, said brake arms engage the guiderail by frictional engagement and said load sensing means generates a signal representing vertically directed holding forces which occur.
A vertical conveyor for carrying loads comprising:
- a load carrying means;
- a drive unit;
- an elastic suspension means connecting said load carrying means to said drive unit for moving said load carrying means in a vertical direction adjacent a guiderail;
- a braking device attached to said load carrying means for preventing vertical displacements and vertical vibrations of load carrying means of vertical conveyors while stopped at landings, said braking device frictionally engaging said guiderail when said load carrying means is stopped at a landing;
- and
- a load sensing means mounted on said braking device for generating to said drive unit a signal representing vertically directed holding forces which occur.
A method of preventing vertical displacements and vertical vibrations of a load carrying means in a vertical conveyor while stopped at landings, the conveyor having at least one drive unit which can be regulated, a load carrying means with a braking device being guided by a guiderail, the load carrying means being suspended by an elastic suspension means, and while stopped at a landing the load carrying means is held fast on the guiderail by the braking device, comprising the steps of:
- a. sensing magnitude and direction of vertically directed holding forces occurring in the braking device while engaged with the guiderail;
- b. generating a signal to the drive unit representing the sensed magnitude and direction of the vertically directed holding forces;
- c. controlling the drive unit in response to the signal to balance the load on the suspension means;
- and
- d. releasing the braking device from the guiderail.
Dependencies are inferred from the claim text.