DE2326386A1 - MAGNETIC DOOR LOCK - Google Patents

Description

Düsseldorf, May 22, 1973

Helmuth M. Schroeder

Castro Valley, CaI., V. St. A * Magnetic door holder

The present invention relates to door stoppers and door stays, to limit the opening movement of a door and / or to hold the door in this limit position.

Many doors have door closers or are spring loaded Door hinges provided so that the open door is returned to its closed position, if not for a corresponding Blocking is taken care of. In order to keep such doors in the open state, inter alia. Door stop provided.

A known door stop is attached to the rear of a door and works with a short rod which is hinged at one end to the lower area of the door and at its other end ends in a rubber stopper or a rubber cap that can attack the floor when the short, articulated rod is dropped on the ground. In such a lowered position, the rubber stopper engages or _s in the rubber cap on the ground, so as to prevent friction by a return of the door to its original, unopened position.

309884/0438

Telephone (0211) 3208 58

Telegrams Custopat

Another door arrester according to the prior art works with a rubber stopper that can be pressed down by foot actuation o. The like. Which can be brought into engagement with the floor after a door has been opened in order to close the door in its open position keep. Such door arresters are usually equipped with a locking element that can be released by foot actuation, so that the plug can spring back from its position in which it engages the floor, around the door release for return to the closed position.

In both cases, the door arrester cannot determine the open position of the door; respective operator can be made individually. In both cases, the determination is made by frictional attack on the floor area. If the force exerted by the door closer exceeds the frictional resistance of the door arrester, it grinds the door holder along the floor surface, so that one unwanted wear and the appearance of grinding marks.

The object of the present invention is therefore to create a door arrester that can simultaneously serve as a door stop, with certainty no grinding or scratch marks on the floor surface and is simple and easy to use for the rest can be operated effectively.

To solve this problem, a magnetic door arrester is according to the invention characterized by a first subgroup with a magnet and a second subgroup with magnetic material, a device for defining one of the two subgroups on a door and a device for defining the other of the two sub-groups on the floor at a point where the opening movement of the door is limited and the door in an open position should be held. .

309884/0436

2326388

The invention is explained below using an exemplary embodiment in conjunction with the associated drawing. In the Drawing show:

Fig. 1 is a perspective view of a door arrester according to the invention in its assignment to a door;

FIG. 2 shows, on an enlarged scale, a horizontal section through FIG. 1 along the line 2-2, also in dashed lines the door when approaching the hold-open position;

Fig. 3 is a partially sectioned side view of the door firmest Hers according to the invention in its ineffective location?

Fig. 4 is a view corresponding to FIG _o 3, wherein, however, the door stop in its operative position is?

FIG. 5 is a plan view of the arrangement according to FIG.

6 shows a cross section through FIG. 3 along the line 6-6 f in the direction of the indicated arrows;

Fig. 7 seen a section through FIG _o 3 along the line 7-7 in the direction indicated by the arrows?

8 shows a cross section through FIG. 3 along the line

8 - 8 _{ρ seen} in the direction of the indicated arrows?

FIG. 9 shows a cross section through FIG. 4 along the line

9 - 9, seen in the direction of the indicated arrows.

309884/0438

In detail, the drawing in Fig. 1 shows a first sub-group 1 and a second sub-group 3 of the door arrester after Recognize invention, the sub-group 1 is attached to the lower edge of one of the two sides of the door 5, while the second subgroup 3 in the floor 7 at a point of the passage through from the first subgroup when the door is opened or closed Circular arc is embedded, which determines the desired open position of the door or its limit position.

The magnetic door stop according to the invention is preferred - although by no means exclusively - intended for a door with a door closer 9 according to FIG. 1, under spring tension standing joints (not shown) or other suitable self-closing elements.

Subgroup 3 intended for letting in a = floor 7 has a cylindrical housing 11 made of a non-magnetic material such as aluminum, into which a cylinder rod 13 is slidably inserted is, which can consist entirely of magnetic material such as iron or aluminum, which at its free end by a Disc of magnetic material is closed, so that the overall weight can be reduced considerably. About the weight To reduce this component further, the cylinder rod can be provided with a recess from its other end, so that it practically represents an aluminum tube »

The cylindrical housing 11 is in-the floor 7 at the right Recessed place and closes at its top flush with the floor surface, so that there is no obstruction in terms of both the freely swinging door as well as people passing by. The housing 11 preferably has a strong one Flange 15, which is let into the floor 7 with the housing.

.109884 / 0

The fixed on the door 5 sub-group 1 of the door arrester according to the invention has a semi-cylindrical housing 19 lateral flanges 21, 23, with the help of which the subgroup 1 on the door 5 can be set.

Inside the case is a magnet that is in the preferred Illustrated embodiment, two parallel, spaced apart planar, flat magnet inserts 27, 29, which in a cylinder 31 made of non-magnetic material such as aluminum by means of a suitable filling compound 33 Od. Like. Are supported, which has no magnetic properties. The spaced apart magnetic inserts 27, 29 are each exposed at one end, and the cylinder with the magnet inserts is through the lower end of the housing into a introduced cylindrical chamber, in which it is held by two diametrically opposed screws 35, 37, which in are screwed into the bottom of the housing and their heads overlap the edge of the cylinder with the magnetic inserts. the Screw 35 preferably protrudes deeper than the other screw 37, as will be explained further below.

If the door is swung open so that the magnet gets over the place at which the second sub-group 3 is located in the floor 7, the magnetic cylinder rod 13 is immediately engaged pulled with the magnet in order to prevent further displacement of the door and to hold the door so that it remains in place despite the effect of the automatic door closer 9 is unable to return to its closed position.

In this situation, the end that acts on the magnet is the Cylinder rod between the heads of the screws 35, 37 that hold the cylinder in place, and when the screws are both on the circular arc-shaped Path are arranged through which the magnet traverses when the door is opened (or closed), so catch the above End the upper, first subgroup 1 in order to act as a mechanical

309884 / öUS

suggest to act that a shift of the door from the desired one Position in which it is located above the lower, second sub-assembly 3, counter to the action of restoring forces acting on the door impede.

The cylinder rod 13 preferably slides with it in its housing 11 little play. In order then to prevent the cylinder rod 13 from creating a vacuum during the upward stroke that would cause it to open the cylinder rod 13 could hinder or even prevent, and moreover a slow return of the cylinder rod in their To avoid lower end position, 'is the cylinder rod 13 with a axial vent channel 34 is provided.

Another facility is required to release the door from this position provided to urge the cylinder rod 13 out of engagement with the magnet and sufficient for free space between the stop formed by the protruding screw 37 (but not 35) and the cylinder rod 13. It will thus not only the path for closing the door is released, but also by pushing the cylinder rod out of engagement with the magnet, the magnetic force that attracts the rod is reduced, so that the two subgroups are separated from one another is facilitated. The door closer can then be activated again and ensure that the door closes automatically.

To bring the cylinder rod 13 out of engagement with the magnet bring, a pressure element 41 is between the exposed ends of the spaced apart magnet inserts 27 and 29 provided, on which a force can be exerted in the direction of the rod by means of a manually operable device.

For this purpose, the pressure element is attached to the lower end of a vertical pin 43, which protrudes upwards into the housing 19, where its upper end is slidably guided in a recess 45 in the upper end of the housing.

309884/0436

ORIGINAL INSPEGTQ3

A cam 47 adjacent the top of the housing 1 has a shaft 49 which extends up through the top of the housing protrudes. The free end of the shaft 49 protruding beyond the housing is connected to an operating lever 51. One on the vertical Pin 43 seated compression spring 53 is at its lower end on the bottom of the housing and at its upper end on a clamp 55, which is firmly seated on the vertical pin 43. From the clamp 55 from a plunger 57 extends under the action of Compression spring 53, which this exerts on the clamp 55, on the underside the cam plate 47 attacked

The cam plate 47 is provided with an engagement surface 59 which occupies about one half of the cam disk and forms a flat surface that is slightly above the lower boundary plane the point lying on the cam disc is inclined or »rises in the upward direction Cam disk 47 approximately diametrically spanning shoulder surface 61, which limits the rotary movement of the cam disk to about 180 °.

With such a 180 ° -verds © lh.öaej the plunger 57 moves - depending on the vertical rise of the cam surface - by a certain distance in the vertical direction upwards or downwards , whereby the pressure element 41 connected to it makes the same movement only needs to be large su _p that the physical contact between the magnet and the cylinder rod is released and the cylinder rod from the region of the 37 lead out comes formed by the head of the screw, to facilitate as described above to the separation of the two subsets "

As can be seen _s makes the magnet for opening the door in its desired position for "that the cylinder rod 13 moves into engagement with the magnet and holds the door in its open position, provided of course that the pressure element is in its inoperative position"

The engaging end of the cylinder rod is then between the protruding screw heads, which serve as stops to a prevent forcible displacement of the door in one direction or the other with the door in its substantially open position is locked.

To release the door for closing, the cam disk is turned, so that the rod is forcibly separated from the magnet and the protruding head of the screw 37 free enough Tree has. The door closer 9 can then take over the closing of the door, Or, if such a door closer is missing, the door can be closed by hand.

On the other hand, the door should not be locked in the open position are, the operating lever 51 is rotated so that the pressure element 41 is lowered. Awake to such a pretense The cylinder rod 13 jumps as soon as the door has the position of this cylinder rod 13 has reached 7 in the floor, in engagement with the pressure element, but the holding force is sufficiently low, to allow the door to be closed under the action of a door closer. If no special security measures are in place, so under these circumstances the door could swing beyond the point at which the second subgroup is let into the floor and possibly cause damage »

However, if the screw 35 is allowed to protrude to a point below the level of the pressure element in its lower end position, it serves as a stop which prevents the door from opening beyond this point.

Claims;

Claims (8)

Claims Magnetic door holder, characterized by a first Subgroup (1) with a magnet and a second subgroup (3) with magnetic material, a device for fixing one of the two subgroups on a door (5) and by means of a device for defining the other of the two subgroups on the floor (7) at a point where the opening movement of the door is limited and the door is held in an open position should be 2. Door holder according to claim ΐ, characterized by a housing (19) to accommodate the magnet, which can be fixed on the door- ■ 3. Door holder according to claim 1 or 2, characterized in that that the magnetic material has the shape of a cylinder rod (13) has guided the sliding in buckets of cylindrical housing (11) is that together with the cylinder rod (13) at a desired Place in the floor (7) =, 4. Door holder according to one of claims 1-3, characterized by means of reducing the magnetic attraction of the magnet on the magnetic material » 5. Door holder according to claim 4, characterized in that the means for reducing the magnetic attraction 'of the magnet comprises means to reduce the magnetic To push material out of a position in which it is in physical contact with the magnet » 6. Door holder according to claim 5, characterized in that the means for separating the magnetic material from the magnet comprises a pressure element $ 41} which is connected to the magnetic Material is engageable and is in communication with a manually operable cam member to the pressure member (41) to push against the magnetic material. 7. Door holder according to claim 6, characterized by a device to limit the opening movement of the door to a point that is in line with the magnetic material, when the pressure element is in its operative position to separate the magnetic material from the magnet cares. 8. Door holder according to claim 7, characterized in that the Device for limiting the opening movement of the door has a projection, which extends from the first sub-group (1) extends and lies in the path of movement that the first subgroup passes through when the door is opened, and above the plane of the Pressure element protrudes when this is in its operative position. KK / sm 5 109884/0436 since