SU1364603A1 - Step hoist - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to the field of hoisting machines, in particular, to stepper lifts. The purpose of the invention is to increase reliability. Step lift contains installed on the basis of 1 poddom

Description

W (f

WITH

multiple beam 2, which may be a structural element of the erected structure. Jacks 3 are located on this beam. Load-carrying elements 4 and 5 are connected to the jacks, with load-gripping elements in the form of articulated supports that can be rotated in the vertical plane of the stops 6, which interact with the platforms 7, located with a step smaller than the stroke of the jacks. Elements 5 are formed by at least four closed frames installed on the rods of the jacks 3 and covering the beam 2 and the element 4, on the inner surface of which the indicated platforms are fixed. Clamps 8 are fastened on the beam 2 and element 4, covering the corresponding elements 5, the lower part of each of which is mounted in guides 9 mounted on the base 1. On one axis with each stop 6, a balance bar is pivotally mounted for rotation in the vertical plane, which interacts with limiter, made on the stop. At each stop a double-arm lever is pivotally attached, which interacts with one shoulder with a vertical frame element made in the sections between pads 7 with a profiled load-carrying element 5. The other arm interacts with an additional stop mounted on the stop 6, while a counterweight is attached to this shoulder. Each of these levers is made in the form of two plate-like elements interconnected and covering stop 6. 3 3. the item of f-ly, 7 ill.

one

The invention relates to lifting machines, in particular to stepper lifts.

The purpose of the invention is to increase reliability.

Figure 1 shows the stepper lift, a general view; in fig. 2 - node stops when lifting the load; fig.Z - the same, with the passage of platforms (when lifting); figure 4 - the same, when opus kaniya; on fig.Z - section A-Anafig.4 on figure 6 - the node stops when passing platforms (when lowering); 7 - the same, at the moment of exit from the profiled surface.

The stepper lift contains the under-support beam 2 installed on the base, which may be a structural element of the erected structure. Jacks 3 are located on this beam. Load-carrying elements 4 and 5 are connected to the jacks, having load-handling elements in the form of balls fixed with the possibility of rotation of the stops 6 in the vertical plane, interacting with the platforms 7, located with a step smaller than the stroke of the jacks. Load-carrying elements 5 are formed at least four times mounted on the rods

ten

15

20

25

thirty

jacks 3 and covering the beam 2 and the load-carrying element 4 closed frames. On the inner surface of the frames specified areas. Clamps 8 are fastened to the jack-top beam 2 and the load-bearing element 4, covering the corresponding elements 5, the lower part of each of which is mounted in the guides 9 mounted on the base 1.

. On one axis with each stop 6 pivotally with the possibility of rotation in the vertical plane mounted balancer 10, which interacts with the limiter II, made on the stop.

At each stop, a double-arm lever 12 is pivotally attached, interacting with one arm with a vertical arm. frame element, made in the areas between the platforms 7 profiled, load-carrying element 5. The other arm lever 12 communicates with an additional stopper 13 mounted on the stop, while the counterweight 14 is fixed on this shoulder. Each of these double-arm levers is made in the form of two plate elements, interconnected and covering the stop 6.

Stepper lift works as follows.

To lift a large-sized cargo, synchronously turn on the drives of the jacks 3 of the load-carrying elements 5. The lower platforms 7 of the elements 5, lift up, support the stops 6 and perceive through them the load of the weight of the load being lifted. The load is lifted along with the elements 5.

The stops 6, which are located in the slots of the vertical elements, slide freely inside the grooves, pass the lower platforms 7 of the elements 5 and under the action of gravity open up above them if there is a stock of the stroke of the rods of the jacks 3 at this moment.

The synchronous actuators include jacks 3 drives of another pair of elements 5, platforms 7, lifting up, with upper surfaces through stops 6 perceive the load from the mass of the lifted load. The load continues to rise along with the elements 5. At the same time, the pair of elements 5 descends simultaneously with the return stroke of the rods of the jacks 3. The load of the elements 5 is lifted until the stops 6 sliding in the slots of the vertical frame elements pass through the next platforms 7

The process of alternately putting into operation the elements 5, to which, also alternately, the load from the mass of the lifted load is transferred, repeats until the load is lifted to the required height.

To lower the load or the load-bearing element 4, each double-arm lever 12 must be installed in an inclined position, fixing it with an additional stop 13 so that the lever interacts with the vertical frame elements and transfer the balance weights 10 on all the stops 6 to the side of the vertical frame elements, which translates the center the tin stops 6 in the direction of its support part (position II, figure 4). In the initial position, the rods of all the jacks 3 are fully extended.

The load from the weight of the load through the lugs 6 is perceived by the elements 5. The wedge lugs 6 located in the slots of the vertical elements are opened and held in this position by the levers 12 (Figures 4 and 5).

To lower the load synchronously include the jack drives to the cargo carrier

elements 5 on the retraction of rods. When lowering the load, the stops 6 are held in the open position by levers 12, which crawl along the edges of the shelves of the vertical frame elements until they fall into the notches on the profile surface. In this case, the stops 6 rotate around an axis and with their support part fall on the upper surfaces of the pads 7.

Upon further lowering of the load-carrying elements, the stops 6, under the action of the weight of the load, turn around

axis until full fixation on platforms 7 and transferring the load from the weight of the load to another pair of elements 5. This position corresponds to the remainder of the stroke of the jacks 3.

The elements 5, lowering the rest of the stroke of the rod of the jacks 3, release the stops 6, as the levers 12 interacting with the profiled surface rotate around the axis in the opposite direction from the stopper 13 and the stops 6 under the action of the mass of the balances 10 fold until the stops 6 contact load carrying element 4.

The next stage of lowering the load is made by switching on (synchronous) the operation of pulling the rods of the jacks 3 of another pair of elements 5 and of lifting the rods of the jacks of the first pair. When the arms 12 exit from the profiled surface, the stops 6 open under the platforms 7.

The alternating process of the elements is repeated until

lowering the load or carrying element to the desired height.

Claims (4)

Invention Formula 45 1 Step-by-step elevator, containing a load carrier mounted on the subframe base with jacks placed on it, load-carrying elements connected with jacks with load-carrying gQ elements in the form of pivotally fixed stops that interact with platforms located with a step smaller The jacking stroke, characterized in that, in order to increase reliability, the load-carrying elements are formed by at least four jacks mounted on the rods and covering five, the jack-up beam and the load-carrying element with closed frames, on the vertical elements of which the indicated platforms are fixed on their inner part. 2. A lifter according to claim 1, characterized in that clamps mounted on the sub-multiple beam and the load-carrying element, covering the respective frames, the lower part of each of which are mounted with the possibility of vertical movement in rails mounted on the base. 3, The elevator according to claim 1, of which is, in order to extend the functionality by ensuring the lowering of the figure: 646036 for, on one axis with each stop a hinge can be rotated in a vertical plane; a balancer is installed, which interacts with a stop made on the indicated stop, with a double-arm lever hinged at each stop, one arm interacting with vertical frame element, made in the areas between the pads, profiled, and the other - with an additional limiter installed on the specified support, and on this shoulder 5 fixed counterweights. 4. The elevator in p. 3, o t and - due to the fact that each two-armed lever is made in the form of two plate elements connected 2Q between each other and covering the stop. r ± IT fuz. 13T-7T