ES2273551A1 - Safety device for permanent magnetic lifters, has spring ball fixed on shaft, sliding latches fixed with lever that is attached to shaft, and body provided with superior retention unit, where center hole is formed on body - Google Patents

Abstract

The device has a body (2) provided with a superior retention unit (6). A center hole is formed on the body. Sliding latches (5, 7) are fixed with a lever (4) that is attached to a shaft (3). A spring ball is fixed on the shaft.

Description

Safety provision for magnet lifts permanent.

Object of the invention

The present specification refers to a request for an Invention Patent corresponding to a safety provision for permanent magnet lifts, whose purpose is to achieve from the magnets the elevation of loads and by itself ensuring an appropriate safety margin between the actual force generated by the lift made on the piece and the weight of it and, as a consequence, the elimination Virtually total accidents.

Field of the Invention

This invention has its application within the industry dedicated to the manufacture of machines and devices permanent magnet for lifting loads.

Background of the invention

As you know, magnet lifts permanent are used conventionally for lifting of ferric loads.

The elevators used within this application are essentially configured by one or more magnets permanent whose position is qualified to be changed from the external by mechanical means, since in a position it attracts the load and in the opposite releases it.

In the applications the existence of two sets of magnets, some fixed and others trained to be mobilized, getting in a position that the flow generated by the two magnets add up and, consequently, close through the load attracting it, and in the opposite position the flow of both magnets close together releasing the load. The location and placement of fixed magnets, as well as the number of the same, is very variable and always in accordance with the wishes of the maker.

The existence of inventions is also known and applications used so far based, unique and exclusively, in the fact that the magnet that is rotated in a position gets all its magnetic flux closed by the charge attracting it, and in the opposite position the magnet will Short circuit by the poles releasing the load.

Outwardly, these magnet lifts permanent present a very similar configuration, although, obviously, it can partially vary its shape, size, etc., being formed by a body from which a lever or lever emerges which has the possibility of reaching two positions, and in one of the positions generates the attraction of the load and in the position opposite releases it.

In the attraction position the lever or handle it is fixed by means of a mechanical element, latch, staple, etc., with in order to avoid losing its position due to a crash or blow and the burden shed by releasing it.

The force that a magnetic elevator generates about the load depends on many and varied factors, mainly of the separation or air gap between the magnet and the cargo produced by dust, foreign objects, irregularities of the load, etc., as well as the thickness of the load, decreasing substantially the actual force with thin loads, for Example badges.

Consequently, the fact that it is not possible for the operator who acts on the elevators of permanent magnet knowing what real force is effecting on the piece that is intended to be raised and only knows the performance of the elevator, performing the elevation or lack of elevation, being able to lift a piece with a real force so tight to the weight itself of the piece that during the greater elevation or transfer, due to a shaking or vibration of the crane, as well as a small rub against an obstacle, can generate the fact that the load is detached and Generate a serious accident.

The obvious solution to the problem currently existing in this area would be to be able to count With a safety arrangement for permanent magnet lifts that will obviate the anomalies mentioned above.

However, the applicant does not is aware of the current existence of a invention that presents the characteristics cited as suitable.

Description of the invention

The safety provision for elevators permanent magnet that the invention proposes, gathers in context all the advantages indicated as necessary for acting with safety of the invention constituted as a magnet lifter permanent, ignoring the possibility of their occurrence accidents

More specifically, the provision of Safety for permanent magnet lifts object of the invention it consists of fixing a third position of the moving magnets, of so that in that position only a part of the magnetic flux available, so that it rises slightly the load of the ground and in this situation of "taking of load" to then move the position of the moving magnets to a total utilization situation of its magnetic flux called as of "total strength."

Consequently, following the angle or position of the rotating magnets in the position of " load "the relevant flows will be chosen and subsequently will get prior choice the safety margin that will take the elevator in the "total force" position, for example, 50% more than the real force that he has made in the situation of "take of load "or 100% more according to the requirements of security.

Description of the drawings

To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, is accompanied herein descriptive, as an integral part of it, a set of planes in which with an illustrative and non-limiting nature, represented the following:

Figure number 1.- Represents a view in front and side elevation partially sectioned of the object of the invention corresponding to a security arrangement for permanent magnet lifters in the "loose position of load".

Figure number 2.- Reflects a similar view to that shown in figure number 1 in the position of "taking load".

Figure number 3.- Represents, finally, a view of the object reflected in figures 1 and 2 in position of "total strength."

Preferred Embodiment of the Invention

In view of these figures, it can be seen that once the elevator (1) is placed on the load, the operator turns the lever (4) until the first latch or slip is passed, and in this situation it is found that the elevator (1) achieves separate the piece to be moved from the ground or area where the piece is positioned
gives.

Next, the operator will push the lever (4) until you go to the second latch or slip and move the load knowing that the elevator is really generating a force at least 50% or 100% greater than the weight of the piece, depending on choose the elevator with 50% or 100% safety or other margin Any preset.

As can be seen in these figures the Elevator body (1) has been referenced with (2), presenting the lever (4) attached to a shaft (3) and having latches (5) and (7) in opposite positions in order to ensure good operation of the elevator, which has a top body (6) with a central hole applicable for fixing the boom of the lifting element configured as a crane or Similary.

In synthesis, the invention incorporates as key advantages of presenting a first position of security for the taking of the load to, later, generate the total force lift according to the weight of the piece a move, subsequently allowing the release of the cargo moved, all operated by a lever installed in its context

It should be noted that the two force positions useful built-in arrangement are fixed by balls with dock.

Claims (2)

1. Safety provision for permanent magnet lifts, of those consisting of one or more permanent magnets whose position is capable of being changed from the outside by mechanical means, acting in a position for the attraction and fixation of the load and in the opposite for the release of the same, characterized by being constituted from a body (2) that incorporates in the upper part a pronunciation (6) provided with a central perforation for its fixation in the boom of the lifting element, presenting a lever (4 ) located laterally with fixing means (5) and (7) located in opposite positions, the lever (4) being fixed to an axis (3), the arrangement being provided with a first mobilization position of the piece to be moved, a second position of fixation of the piece and a third position of mobilization for the transfer of the load, incorporating a complementary position of liberation, being activated all the s positions by means of the lever (4) with the collaboration of slips, latches or means for fixing the lever (4), (5) and (7). 2. Safety arrangement for permanent magnet lifts, according to the first claim, characterized in that the two positions of useful force are fixed by means of spring-loaded balls.