DE1081162B - Permanent magnetic locking piece for doors, lids or the like. - Google Patents

Description

It is known per se to provide doors, lids or the like with permanent magnetic closures. To A known proposal is a disk-shaped one in the permanently magnetically excited part of the closure Permanent magnet arranged between two pole plates running perpendicular to the closure edge. magnet and pole plates are loosely inserted into the locking piece to prevent shrinkage of the door, for example compensate automatically and thus be able to set the required air gap size. Such a system is not switchable.

According to the invention, a closure piece is to be specified which is simple to manufacture, in a simple manner Way inserts into the plate-shaped body of the door and is also switchable. It should also be suitable for installation in any plate-shaped body, so as to be used as a connecting element z. B. between a Plate with a support, a carrier or the like. To be able to serve.

The problem posed is achieved by two perpendicular to the closure edge magnetically in two halves split pole plates are provided. A disk-shaped one is rotatable between these two plates Magnet provided which is axially magnetized such that two parts with a semicircular cross-section which are oppositely polarized. Magnetizing permanent magnets in this way is in itself known, but has so far not been used for purposes according to the invention. The arrangement gives the Possibility of a bow-shaped, the permanent magnet enclosing element made of non-ferromagnetic Provide material that serves as a carrier for the pole plates, the ends of which around the edges of the base surface reach around the bracket.

In a further embodiment of the invention, however, it is also possible that one pole plate is replaced by a return plate to replace, expediently the Pole shoes are angled outwards by 90 ° ^

In the sense of the invention it is also possible between the pole plates in addition to the rotatable " Permanent magnets two fixed compensation:; - ^ magnets to arrange their magnetic force together corresponds to the magnetic force of the rotatable magnet. In this way it is possible, taking advantage of the at. well-known compensation principle in the switch-on device to exert a great adhesive force and not switch off by a short circuit across the Pole pieces, but to be achieved by compensation.

In the drawings, preferred embodiments of the inventive concept are shown by hand These representations are to be explained in more detail below, the invention.

Fig. 1 is a perspective view of an embodiment;

Permanent magnetic locking piece:
for doors, lids or the like.

Applicant:

German stainless steel works

Corporation,
Krefeld, Oberschlesienstr. 16

Walter Zeischegg, Ulm / Danube,
has been named as the inventor

Fig. 2 shows the individual parts of Fig. 1 blown apart;

Fig. 3 illustrates the installation in a door body;

Fig. 4 shows a further embodiment in a perspective view;

Fig. 5 shows individual parts of Fig. 4 blown apart;

Figure 6 is a perspective view of a modified embodiment of Figures 1 and 2;
Fig. 7 is a vertical section and

Fig. 8 is a view of a third embodiment.

In Fig. 1 and 2, the two pole plates 1 and 2, which are perpendicular to the closure edge, can be seen. They are perpendicular to the shutter plate by an inserted, non-ferromagnetic strip S in two Divided into halves. The disk-shaped permanent magnet is located between these two pole plates 1 and 2 As can be seen in particular from Abbr. 2, it is axially magnetized in such a way that two parts join with semicircular cross-section, which are polarized in opposite directions. In each pole plate there is one Bore 5 is provided, nipples 6 are inserted into this bore, the square ends 7 of which into the Engage square hole 8 of magnet 4, wear it and at the same time from the one provided with a notch 9 Make nipple 6 rotatable.

The pole shoe plates 1 and 2 are provided with pole shoe-like lugs 10 and 11, which are around a Reach around plate 12 made of non-ferromagnetic material. How readily understandable are Adjacent pole shoes polarized in opposite directions in the switched-on position, d. i.e., any angled Pole shoe 10 or 11 is opposite a pole shoe of opposite polarity. In the switch-off

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Claims (5)

position, the pole faces of the permanent magnet 4 are short-circuited on the pole plates 1 and 2, so that the adhesive force is switched off. Fig. 3 shows a plan view of the edge of a door or plate 13, in which the permanent magnet locking piece according to Fig. 1 and 2 is installed. If it is not desired that the pole shoes 10 and 11 protrude beyond the surface, a support which magnetically separates the pole shoes can be applied to the base surface 12 in addition. Of course, the frame of the door or the object to which the cover or the plate 13 is to adhere must be made of ferromagnetic material or have a ferromagnetic support in the area of the pole shoes 10 and 11. The embodiment according to Figs. 4 and 5 does not differ with regard to the pole plates 1 and 2 and the arrangement of the magnet from the arrangement according to Figs. 1 and 2. However, in contrast to Figs. 1 and 2, a bow-like element 14 enclosing the permanent magnet is made non-ferromagnetic material is provided, which serves as a carrier for the pole plates 1 and 2. After inserting the disk-shaped permanent magnet, the pole plates are screwed to the bow-shaped body. Pole shoes 10, 11 grip around the base surface of the bow-shaped body 14. Here, too, it is possible to provide a support that magnetically separates the pole shoes. In a modification of the embodiment according to Fig. 1, it is also possible to leave out a pole plate, so that, as can be seen from Fig. 6, only one pole plate 16 is present. The permanent magnet 4, which is firmly connected to a likewise circular return plate 17, rests on this pole plate. The pole shoes of the pole plate 16 are, as indicated at 18, angled outwards. The closure element according to FIG. 6 is installed in the plate 13 to be held in the same way as is shown in FIG. However, the pole shoes are then angled in the direction indicated by arrows 19 in FIG. 3. Adhesion to a corresponding strip of the door frame or the like takes place in such a way that it is necessary to pull it off in a vertical direction. This increases the locking force generated. The switching on and off is otherwise carried out as described in connection with the other embodiments. According to FIGS. 7 and 8, two rectangular pole plates 20 and 21 are provided, which are also divided into two magnetically separated sections by a non-ferromagnetic intermediate layer 22 each. The rotatable permanent magnet 4 is located between these two pole plates. Two permanent magnets 23 and 24, which are also axially magnetized, are also provided, the magnetic force of which together corresponds to the magnetic force of the magnet 4. In the on position, all magnets contribute to the formation of the adhesive force. In the off position, on the other hand, the stationary magnets 23 and 24 compensate for the magnetic adhesive force of the magnet 4. If closures for doors and lids are mentioned in the description and claims, this expression should also include an adhesive exclusion of two or more parts from one another . The devices according to the invention are in fact also suitable as pure connecting elements for butt-abutting parts. Oxide-ceramic material is preferably used as the permanent magnet material for the construction of the closures according to the invention, specifically in particular on the basis of iron (III) oxide — barium oxide. extra patent claims: 1. Permanent magnetic locking piece for doors, covers or the like. In which a disc-shaped Permanent magnet is arranged between two pole plates running perpendicular to the sealing edge, characterized in that the pole plates are each divided into two halves magnetically separated from one another are divided and the permanent magnet is rotatably arranged and axially magnetized such that result in two parts with a semicircular cross-section, which are polarized in opposite directions. 2. Closure piece according to claim 1, characterized by a bow-shaped, the permanent magnet enclosing element made of non-ferromagnetic material as a carrier for the PoI plates, the ends of which grip around the edges of the base of the bracket. 3. Closure piece according to claim 2, characterized by a magnetic pole shoes separating support on the base surface. 4. Closure piece according to claims 1 and 2, characterized in that a pole plate through a return plate is replaced. 5. Closure piece according to claims 1 to 3, characterized in that between the PoI plates two fixed compensation magnets are arranged, the magnetic force of which together Corresponds to the magnetic force of the rotatable magnet. Considered publications:
German Patent No. 676 454; German patent application D 2287 VIII el 21g (published on December 20, 1951); German utility model No. 1 753 501;
Swiss patent specification No. 312 991. 1 sheet of drawings © 009 508/3 «4.60