EP1694935B1 - Electrically actuatable door opener - Google Patents

Abstract

An electrically operated door opener, with a swivelable swing trap for blocking or releasing of a door side switch trap, with a movable control lever, and a change-over, has been described, which can move into a position that blocks the swing trap and into a position that releases the swing trap, and is so arranged with the control lever, that the change-over into the blocking position can be locked by means of the control lever. Furthermore, there is a position indicator for moving the control lever for releasing or locking the change-over. The position indicator has an electromotor, on the motor axis of which an eccentric cam is mounted. The electromotor is mounted with a control lever, so as to hit the centrifugal cam against the control lever on activation of the electromotor due to the rotation of the motor axis, causing the control lever thereby to move.

Description

The invention relates to an electrically operated door opener.

Electrically actuated door openers have long been known. They usually have a pivoting latch into which a snap trap engages in the locked state and is held there. In the releasing state, the pivotal latch is pivotable against a spring force and can thus release the latching latch. The release of the pivot latch is generally electrical and is triggered by a person via buttons or automatically by an access control system

To release the door opener usually linear position sensors are used which have an armature which is electromagnetically moved in the linear direction. The armature is free to move at rest and can be moved by externally applied shocks or vibrations. This can lead to the door opener releasing the pivoting latch by manipulation from the outside. In order to reliably prevent unauthorized access, it is therefore necessary for the electric door opener to be as insensitive as possible to external impact.

Furthermore, it is possible that upon release of the door opener, the pivotal latch is biased, e.g. a person is already pressing against the door. If it is attempted to release the pivot latch of the door opener, it may lead to a blockage that prevents release of the pivot latch. Therefore, it is desirable that the door opener can be released even with a preload on the pivot latch.

It is an object of the present invention to provide a shock- and vibration-proof door opener that can be released even with a preload.

This object is achieved by the electrically actuated door opener according to claim 1.

Further advantageous embodiments of the invention are specified in the dependent claims.

According to the invention, an electrically operable door opener is provided, which has a pivotable pivot latch for holding or releasing a snap trap. Furthermore, a movable locking lever and a change is provided which is movable between a position blocking the pivoting latch and a position releasing the pivoting latch. The change is arranged on the locking lever, that the change in the blocking position by the locking lever can be locked. With the help of a positioner, the locking lever can be moved to lock or release the change. The actuator has an electric motor, on whose motor axis a centrifugal eccentric is mounted The electric motor is arranged on the locking lever to hit the centrifugal eccentric upon activation of the electric motor by the rotation of the motor shaft against the locking lever, so that the balanced locking lever is moved.

An advantage of the invention is that the electrically operable door opener is less sensitive to shock and vibration effects, as in place of a linear positioner, an electric motor is used to operate the door opener. Electric motors are essentially not to be rotated by impacts or shocks, in particular not in a rotational speed, which is necessary for operating the centrifugal force. The use of the centrifugal force has the advantage that the impulse with which it beats against the locking lever, can be set almost arbitrarily by the engine speed, so that even with a larger preload on the pivot latch and thus on the change unlocking the change and thus a release of the pivotal latch is possible. Since the locking lever is balanced around the axis of rotation also here blows or shocks lead to no dynamic movement. Thus, the system is insensitive to shock and vibration.

Preferably, the locking lever may have a chamfer against which the centrifugal eccentric strikes during rotation to move the locking lever in a direction parallel to the axis of rotation. By adjusting the chamfer angle and the chamfer width, it is possible to adjust the travel to which the lock lever is moved.

The centrifugal eccentric may have one or more eccentrically mounted on an eccentric axis impact disc (s), which is mounted on the eccentric axis in the radial direction of the axis of rotation pivotally or rotatably.

The change can be arranged on the pivoting latch in order to move the swing when pivoting the pivot latch.

According to a further embodiment, the change is substantially L-shaped. In this case, a first exchange leg is coupled to the pivot latch to move the first exchange leg when pivoting the pivot latch. A second exchange leg is also coupled to the locking lever, wherein when locking the change of the second exchange leg is locked by the locking lever, so that a movement of the change is prevented in a pivoting of the pivot latch.

The second exchange leg preferably has a first holding element, which is held when locking with the locking lever to a second holding element of the locking lever and does not cooperate with the release of the second holding element.

The locking lever may be pivotally supported on a pivot axis. In this case, the locking lever is arranged so that when locking by the locking lever and when exerting a pivoting force on the pivot latch of the second change arm exerts a force in the direction of the pivot axis on the locking lever.

In particular, the pivotal latch may be coupled to the first changeover leg such that a leverage force is exerted on the first changeover leg in a pivoting force on the pivoting latch, the levering force leading to the change in release by the locking lever to pivot the changeover.

The first exchange leg can for this purpose have a bevel, against which a portion of the pivot latch, so that upon pivoting of the pivotal latch, the portion slides along the slope and thus exerts the leverage on the first exchange leg. In particular, the first exchange leg is smaller than the second exchange leg.

It may be provided that the change is coupled to a spring element in order to press the first exchange leg against the portion of the pivot latch.

Preferably, the second exchange leg is arranged with respect to the pivot latch so as to move the second exchange leg during pivoting of the pivot latch in the direction of the pivot latch when the change is released by the locking lever.

In a further embodiment, the electric motor can be electrically contacted via a terminal block, wherein the terminal block can be fastened to a plurality of positions of a housing of the door opener.

The feedback to a center, whether a door-side snap trap with the Scwekkfalle is engaged, can be done in combination with an adjustable pivot latch with only a single operating lever.

Fig. 1

eine Gesamtansicht eines erfindungsgemäßen Türöffners;

Fig. 2

eine perspektivische Ansicht des Türöffners nach Fig. 1 ohne Gehäuseplatte (Deckel);

Fig. 3

eine perspektivische Ansicht des Türöffners nach Fig. 1 mit verschwenkter 5chwenkfalle ;

Fig. 4

eine Draufsicht auf den Türöffner im verriegelten Zustand;

Fig. 5

eine Draufsicht auf den Türöffner im freigebenden Zustand;

Fig. 6a, b

eine Verriegelungseinheit für den Türöffner bei verschiedenen Rotorpositionen;

Fig. 7a, b

eine weitere Ansicht der Verriegelungseinheit für den erfindungsgemäßen Türöffner bei verschiedenen Rotorpositionen;

Fig. 8

eine Gesamtansicht einer weiteren Ausführungsform eines Türöffners mit einem Anschlussblock;

Figs 9 a)- c)

verschiedene Ansichten einer Schwenkfalle mit einem Mikroschalter gemäß einer weiteren Ausführungsform der Erfindung; und

Figs 10 a) - c)

verschiedenen Ansichten einer Schwenkfalle mit einem Mikroschalter gemäß der Ausführungsform nach den Figs 9 a) - c) mit einem verstellten Schwenkhebel.

A preferred embodiment of the invention will be explained below with reference to the accompanying drawings. They show schematically:

Fig. 1

an overall view of a door opener according to the invention;

Fig. 2

a perspective view of the door opener of Figure 1 without a housing plate (cover).

Fig. 3

a perspective view of the door opener of Figure 1 with 5chwenkfalle pivoted.

Fig. 4

a plan view of the door opener in the locked state;

Fig. 5

a plan view of the door opener in the releasing state;

Fig. 6a, b

a lock unit for the door opener at different rotor positions;

Fig. 7a, b

a further view of the locking unit for the door opener according to the invention at different rotor positions;

Fig. 8

an overall view of another embodiment of a door opener with a terminal block;

FIGS. 9 a) - c)

various views of a pivoting latch with a micro-switch according to another embodiment of the invention; and

FIGS. 10 a) - c)

various views of a pivotal latch with a micro-switch according to the embodiment of the figures 9 a) - c) with an adjusted pivoting lever.

FIG. 1 shows an electrically actuatable door opener 1 according to a first embodiment of the invention. The door opener 1 is usually permanently installed in a door frame. It has a housing 2 onto which a cover plate (cover) 3 is applied by means of screws in order to close the interior of the door opener 1. The door opener comprises a pivot latch 4, which is held against a spring force about a pivot axis pivotally mounted in the housing 2 and can be pivoted in the direction of the housing interior. The pivotal latch 4 is shown in a starting position and serves a snap trap (not shown), on a door o. is arranged to hold or release. For this purpose, the pivoting catch 4 is provided with a projection 5, behind which the latching latch can latch.

On a side wall of the housing 2, a terminal block 6 is provided, can be created via the electrical connections to a positioner located in the door opener.

In Figures 2 and 4, the door opener 1 without the cover plate 3 are shown in various views, wherein the change 7 is in a blocking position. It can be seen in the interior of the housing 2 a change 7, which has a first change arm 71 and a second change arm 72 The first and the second change arm 71, 72 are arranged approximately at right angles to each other. The change is pivotally mounted on a removable axis 9, so that the change can be pivoted.

In Figures 2 and 4, the change is shown in a position blocking the pivotal latch 4. The first change arm 71 is aligned in the direction of the pivot latch 4, so that it supports by the change axis 9 supports a pivoting of the pivot latch 4 in the pivoting direction.

The second change arm 72 is held by a locking lever 8 against pivoting. For this purpose, the second change arm 72 on one of the Wechselarmachse 9 opposite end a holding portion 10 which engages in a step 11 at one end of the locking lever 8.

The terminal block 6 is held in the housing 2 by a T-shaped groove 12 provided on each of a plurality of sides of the housing 2 or the cover 3. The terminal block 6 has on its rear side a T-shaped holding element, which is designed so that it can be inserted into the groove 12 can. As a result, the connection element 6 can be held firmly on the housing 2. However, it is also possible by means of the plurality of T-shaped grooves 12 to provide a plurality of positions of the connection element 6 on the housing 2 in order to construct the door opener 1 in different configurations.

Figures 3 and 5 show various views of the door opener 1 in a releasing position in which the pivot latch 4 is pivoted to release a snap trap (not shown). In this releasing state of the pivot latch 4, the change 7 is in a releasing position. In the releasing position of the change 7 is this pivoted counterclockwise relative to the blocking position shown in Figures 2 and 4, so that the first change arm 71 is moved in the direction of the pivot axis and then next to the pivoted pivot latch 4, so that the pivot latch 4 is pivoted on the first change arm 71 over ,

The second change arm 72 is now also pivoted about the pivot axis 9 of the change 7 in the counterclockwise direction in the direction of the pivot latch 4. As a result, the structural design of the door opener 1 can be as compact as possible in the design of the size of the housing 2, a possible pivoting of the change 7 away from the pivotal latch 4 does not have to be considered.

So that the change can be 7 pivoted from the blocking position to the releasing position, the locking lever 8 must be moved so that the holding portion 10 of the change 7 is no longer in the stage 11, so that the change 7 with respect to the locking lever 8 freely pivoted is. The pivoting of the change 7 takes place against a spring force, which is effected by a coupled to the change 7 spring element 13. The spring element 13 exerts a spring force on the change 7 in the direction of the blocking position.

The change 7 is moved to the releasing position by a force on the pivot latch 4. The pivot latch 4 gives a tensile force on the projection 5 by being pivoted about the pivot axis. For this purpose, the pivoting latch 4 has a section 14, in particular an edge or a corner, which slides on a bevel 15 on the first change arm 71 of the change 7 and thus the first change arm 71 in the direction of the pivoting axis, ie perpendicular to the pivoting direction of the pivoting latch 4, moved. When the tensile force decreases, the spring force of the spring element 13 presses the first change arm 71 against the portion 14 of the pivoting latch, so that the pivoting latch 4 is pivoted back to its original position, i. in a position where the snap trap can be held. The pivoting catch 4 can also be provided with a further spring element (not shown), which is arranged, for example, on the swivel catch axis, which brings the swiveling catch 4 into the starting position upon release of the pulling force on the projection 5.

The locking lever 8 can be moved by a position indicator 16, which is also provided in the housing 2 of the door opener 1. The locking lever 8 is provided with a spring element 17a, which brings the locking lever 8 in a locking position when the change is in the blocking position and the position indicator 16 is not activated. The locking lever 8 is pivotally held on a locking lever axis. The locking lever axis is preferably arranged in the pivoting direction of the retaining element 10 of the change 7. Thus, a preloading of the change 7 in the blocking position when engaging holding portion 10 in the stage 11 to a compressive force but not to bending and tensile forces on the locking lever 8, so that it can be relieved.

The position indicator 16 is designed as an electric motor whose motor axis is provided with a centrifugal force 17. In FIGS. 6a and 6b as well as FIGS. 7a and 7b, different views of the change 7, of the blocking lever 8 and of the electric motor 16 according to their arrangement provided in the door opener 1 are shown to illustrate the mechanical interaction.

The centrifugal eccentric 17 has a beating disk 18 which is arranged eccentrically on a running disk 19 connected to the motor axle. The impact disk 18 is pivotally or rotatably mounted on the running disk 19, so that upon rotation of the motor axis upon activation of the electric motor 16, the impact disk 18 is moved by the centrifugal force to the outside. An edge portion of the impact disk 18 then describes the largest possible orbit around the motor axis.

In the vicinity of the beating disk 18, the locking lever 8 is arranged. To cooperate with the impact disk 18, the locking lever 8 has a chamfer 26 in the form of a surface inclined to the engine axis, on which the impact disk 18 slides along at least part of its orbit. The chamfer 26 is arranged at a distance from the motor axis which is smaller than the largest possible orbit, so that the outermost edge of the impact disk 18 passes through a smaller orbit. Due to the fact that the outer edge of the impact disk 18 is forced to a smaller orbit, the impact disk 18 exerts a force on the chamfer 26 due to the centrifugal force, so that a resultant force of the locking lever 8 acts in the direction of the motor axis. The resulting force causes a movement of the locking lever 8 and a pivoting of the locking lever 8, since this is pivotally mounted.

When the engine is stopped, the spring force on the locking lever 8 causes the locking lever 8 to be pressed into the locking position. In this way, causes the bevel on the locking lever 8, that the impact disc 18 is rotated on the running disk 19, that the outer edge has the smallest possible distance from the motor axis. This position is shown in FIGS. 6b and 7a.

The movement of the locking lever 8 brings this out of the locking position, so that the change in activation of the electric motor 16 is released.

The chamfer on the locking lever 8 is preferably formed as a bevel, which is inclined in the direction of the electric motor, that the resulting force acts in the direction of the motor axis away from the electric motor 16. About the angle of the slope and the width of the slope with respect to the locking lever 8 can be adjusted by which travel the locking lever pivots maximum upon activation of the electric motor 16.

The chamfer 26 may preferably be curved in the plane perpendicular to the motor axis such that each time the motor rotates, the impact disk 18 first slides along the largest possible orbit on the chamfer 26 and is then continuously forced into a smaller orbit as the rotation axis rotates further. so that the impact disk 18 is pivoted relative to the running disk 19 in a direction opposite to the direction of rotation. In this way, the impact of the impact plate 18 on the chamfer 26 can be significantly reduced, so that the wear of the locking lever 8 is reduced by the impact of the impact plate 18. The time of impact of the impact disk 18 on the chamfer 26 is shown in Figure 6a.

However, a certain impact effect of the impact disk 18 on the chamfer 26 is advantageous. Because at a preload of the change 7 due to a pressure on the projection 5 of the pivot latch 4, the holding portion 10 of the second change arm 71 presses in the stage 11 and thus braces locking lever 8 against the change 7. A movement of the locking lever 8 is then only by overcoming the Clamping force possible. This tensioning force can be achieved by one or more impacts exerted by the impact disk 18 on the chamfer 26. The degree with which the orbit of the outer edge of the impact disc 18 is reduced at a curvature of the chamfer, so u.a. It depends on how strong blows must be on the locking lever to bring the locking lever 8 from the locking state at a preload on the change 7.

In order to reduce the tensioning force between the locking lever 8 and the change 7, it is advantageous to design the second changeover arm as long as possible, so that when the pivotal latch 4 is loaded and a lever force is applied to the first changeover arm 71, the lever arm will be as low as possible at the end of the second Lever arm 72 is caused.

The use of an electric motor 16 to release the change has the advantage that, in contrast to a linear positioner no magnetically actuated armature (balanced locking lever) is present, which can be moved by impact or vibration action, so that a significantly improved manipulation security is given.

FIGS. 8 a) and b) show a plan view and a perspective view of a further embodiment of the door opener according to the invention. In the illustrated embodiment, the connection block 6 is located on a rear side of the housing 2 opposite the pivot latch 4. The T-shaped retaining element 12 engages into a corresponding rear T-shaped slot (not shown) to secure the terminal block 6 securely. The electrical connection lines are loosely conducted as a cable between the electric motor 16 and the terminal block 6 in the interior of the housing 2.

According to another embodiment shown in FIGS. 9 a) -c) and in FIGS. 10 a)-c), it is possible to ascertain, with the aid of a microswitch 20, whether a snap trap in the swivel catch 4 engages in the blocking state of the swivel catch 4 is or not. For this purpose, a movable element 21 is provided below the projection 5, under which the snap latch can engage, on the pivot latch 4, which is pivotally held in a recess in the pivoting latch and is connected to a shift lever 22. When engaging the snap trap under the projection 5, the movable member 5 is pressed in the direction of the pivot latch 4 in the recess, so that the shift lever 22 moves accordingly. The shift lever 22 is coupled to the microswitch 20, wherein the shift lever 22 is actuated upon engagement of the snap latch a switch blade 23 of the microswitch 20 and so makes a switching operation. The switch can be designed as a changeover switch and have two, three or more electrical connections 24.

According to another embodiment illustrated in FIGS. 10 a) -c), the possibility of setting the projection height of the pivoting catch 4 is shown. In particular, in Figure 10a it is shown that the pivoting latch 4 is formed in two parts with a base member 41 and a setting element 42 displaceable thereto. The base member 41 is pivotally connected to the pivoting latch axis while the adjustment member is held by the fastening screws 25 shown in FIG. 1, which are received in elongated screw slots 26. The adjustment member 42 and the base member 41 abut against each other at abutment surfaces, wherein the abutment surfaces each have a plurality of tooth-like latching elements have, which can engage in different positions in each other. By loosening the fixing screws 25, the height of the protrusion 5 on the adjusting member 42 can be adjusted by offsetting the adjusting member from the base member 41, so that the height of the protrusion 5 can be adjusted above the door opener. By tightening the fixing screws 25, the adjusting member 42 can be fixed to the base member 41.

Claims (15)

1. Electrically actuatable door opener (1) with a swivelably pivot latch (4) for holding or releasing a snap latch, with a movable catch lever (8), with a change-over (7) which can be moved between a position blocking the pivot latch (4) and a position releasing the pivot latch (4) and which is so arranged on the catch lever (8) that the change-over can be locked in the blocking position by means of the catch lever (8); with a position indicator for moving the catch lever (8), for locking or releasing the change-over; the position indicator having an electric motor (16) with a motor axle, characterized in that a centrifugal cam (17) is attached to the motor axle, wherein the electric motor (16) is arranged on the catch lever (8) so as to strike the centrifugal cam (17) against the catch lever (8) on activation of the electric motor (16) due to the rotation of the motor axle, thereby causing the catch lever (8) to move.
2. Door opener (1) according to claim 1, characterized in that the catch lever (8) has a chamfer against which the centrifugal cam hits (17) on rotation, so as thereby to move the catch lever (8) in a direction parallel to the axis of rotation.
3. Door opener (1) according to either claim 1 or claim 2, characterized in that the centrifugal cam (17) has an impact disc (18) mounted eccentrically on an eccentric axis, which impact disc is supported on the eccentric axis swivelably and rotatably in the direction of the axis of rotation.
4. Door opener (1) according to any one of claims 1 to 3, characterized in that the catch lever (8) is held swivelably.
5. Door opener (1) according to any one of claims 1 to 4, characterized in that the change-over (7) is arranged on the pivot latch (4) so as to move the change-over (7) on swiveling of the pivot latch (4).
6. Door opener (1) according to any one of the claims 1 to 5, characterized in that the change-over has a substantially L-shaped form, wherein a first change-over shank (71) is coupled to the pivot latch (4), so as to move the change-over on swiveling of the pivot latch (4), and wherein a second change-over shank (72) can be coupled to the catch lever (8), wherein on locking of the change-over (7), the second change-over shank (72) is locked by the catch lever (8), so that a movement of the change-over (7) is hindered on swiveling of the pivot latch (4).
7. Door opener (1) according to claim 6, characterized in that the second change-over shank (72) has a first holding element (10) which is held on a second holding element (11) of the catch lever (8) on locking with the catch lever and does not interact with the second holding element (11) on releasing.
8. Door opener (1) according to claim 7, characterized in that the catch lever (8) is held swivelably on a pivot axis, wherein the catch lever (8) is so arranged that, on locking by the catch lever (8) and on exertion of a swiveling force on the pivot latch (4), the second change-over shank (72) exerts a force on the catch lever (8) in the direction of the pivot axis.
9. Door opener (1) according to any one of claims 6 to 8, characterized in that the pivot latch (4) is coupled to the first change-over shank (71) in such a fashion that on application of an opening force on the pivot latch (4), a leverage is exerted on the change-over shank (71), wherein the leverage on the change-over (7) leads, on releasing by the catch lever (8), to swiveling of the change-over (7).
10. Door opener (1) according to claim 9, characterized in that the first change-over shank (71) has a slope, against which a portion of the pivot latch (4) rests so that, on swiveling of the snap latch (4), the leverage is exerted on the first change-over shank (71).
11. Door opener (1) according to claim 10, characterized in that the change-over (7) is coupled to a spring element (13), so as to press the first change-over shank (71) against the portion of the pivot latch (4).
12. Door opener (1) according to any one of claims 6 to 11, characterized in that the first change-over shank (71) is smaller than the second change-over shank (72).
13. Door opener (1) according to any one of claims 7 to 12, characterized in that the second change-over shank (72) is arranged with respect to the pivot latch (4) in such a manner as to move, on swiveling of the pivot latch (4), the second change-over shank (72) in the direction of the pivot latch (4), if the change-over (7) is released by the catch lever (8).
14. Door opener (1) according to any one of claims 1 to 13, characterized in that the electric motor (16) can be electrically contacted by means of a terminal block (6), wherein the terminal block (6) can be fastened at a plurality of positions of a housing (2) of the door opener (1).
15. Door opener (1) according to any one of claims 1 to 14, characterized in that the pivot latch (4) is constructed in two parts, containing a basic element (41) and an adjustable element (42) that is displaceable relative thereto, and in that there is provided on the pivot latch (4) a movable element (21) which is actively connected to a microswitch (20), so as to detect the engagement of a door-side snap latch with the pivot latch (4).

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