SU1234334A1 - Hoist platform catcher - Google Patents

Description

FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, in particular to catchers of a lift platform.

The purpose of the invention is to simplify the design of the catcher.

Fig, schematically shows the safety device, a general view; FIG. 2 is a section A-A in FIG. one.

The platform 2 is rigidly fixed on the platform 1 of the elevator. In the groove of the platform 2 on the axis x 3 two rollers 4 are installed with the possibility of free rotation, the interaction with the inclined surface of the wedge 5, which with its lower end plane freely hangs on the supporting rail

When an organ is broken or loosened, the switching mechanism is triggered, while its pivoting lever 7 is rotated clockwise and the supporting roller 6 moves the wedge 5 upwards, selecting the clearance c. The wedge 5 with its friction surface presses against the tubular mast 12, the platform 1 with the pad 2 of the rollers 4 "slides against the inclined surface of the wedge 5, creating a braking force between the tubular mast 12 and the friction surface of the wedge 5, which is proportional to the weight of the platform with the load placed on it. The platform is braked and held onto the mast.

After the elimination of the breakage of the traction orgalik 6 of the pivoting lever 7 of the mechanism is switched on, the platform moves up. At the same time, it is associated with a traction organ. At the beginning, the anti-clockwise turns are turned and, on the side surfaces of the pad 2, a pivot lever 7 of the safety mechanism is installed, forming a gap between the support roller 6 and the end surface along the groove 8, spring loaded Q-Wedge 5. Platform 1 with pad 2 is 9 relative to pad 2. At the ends, “slides off the inclined surface of the wedge 5, ti g 8 on the pin x 10 are installed rollers 11,

reciprocating motion

included in the vertical slots b, made on the side surfaces of the wedge 5, and constantly pressing it against the rollers 4. The minimum required clearance between the 25 wedge 5 and the tubular mast 12 of the elevator is set by the position of the turning lever 7 of the switching mechanism. The safety device works as follows.

this stops the pressure from the rollers 4 on the wedge 5 and the braking force (friction force) between the tubular mast 12 and the wedge 5 disappears.

The wedge 5 under the action of its own weight lowers the second roller 6 and, with the action of the springs 9, presses the springs 8 against the rollers 4, restoring the gap in between the mast 2 and the wedge 5.

When an organ is broken or loosened, the switching mechanism is triggered, while its pivoting lever 7 is rotated clockwise and the supporting roller 6 moves the wedge 5 upwards, selecting the clearance c. The wedge 5 with its friction surface presses against the tubular mast 12, the platform 1 with the pad 2 of the rollers 4 "slides against the inclined surface of the wedge 5, creating a braking force between the tubular mast 12 and the friction surface of the wedge 5, which is proportional to the weight of the platform with the load placed on it. The platform is braked and held onto the mast.

After the elimination of the breakage of a traction organ, the platform moves upwards. At the same time, it first turns counterclockwise;

The rotary lever 7 of the mechanism for activating catchers, forming a gap between the support roller 6 and the face surface of the wedge 5. The platform 1 with the pad 2 "slides off the inclined surface of the wedge 5,

this stops the pressure from the rollers 4 on the wedge 5 and the braking force (friction force) between the tubular mast 12 and the wedge 5 disappears.

The wedge 5 under the action of its own weight lowers the second roller 6 and, with the action of the springs 9, presses the springs 8 against the rollers 4, restoring the gap in between the mast 2 and the wedge 5.

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Claims (1)

CATCHER OF THE LIFT PLATFORM, mainly with a tubular mast, containing a block and a brake wedge rigidly fixed to the platform of the elevator, connected to the mechanism for activating the catcher with a traction element and with the block, by means of a mechanism for preventing self-jamming inoperative, as well as rollers installed between the brake wedge and a block, characterized in that, in order to simplify the design of the catcher, horizontal channels are made in the block, in which the specified spring mechanism is mounted, including which includes two movable rigid rods made at the ends with pins equipped with coaxial rollers, while in the brake wedge there are lateral vertical slots in which the rollers of the pins are placed, and the axes of each of the rollers are located in the longitudinal slot that is made in the block.