EP3138985B1 - Closing device for closing a door wing - Google Patents

Description

The present invention relates to a locking device for closing a door with the features of the preamble of claim 1.

Closing devices are known from the prior art with which an automatic closing of door leaves is possible, for example from the DE 42 38 010 A1 . However, the problem with such door closers is that a dead center is reached between the cam disk and the spring device, in particular with large opening angles of a door leaf relative to the door frame of approximately 180 °. Therefore, these door closers do not exert any, at least not sufficient closing effect on the door leaf at such opening angles. In order to initiate a closing process, the door leaf must be manually in the direction of such locking devices Closing direction can be moved until a sufficient closing effect is exerted on the door leaf.

There are also locking devices known which are intended to develop a sufficient closing effect at large opening angles of a door leaf, for example from the DE 42 39 219 A1 or from the DE 195 40 266 A1 . However, these door closers have the disadvantage that they are directional and / or have a complex structure. Locking device-related locking devices lead to a high level of storage and confusion when purchasing and / or installing such a locking device. DE 1 925 570 A1 shows a locking device with features of the preamble of claim 1.

The present invention is based on the object of using simple structural means to enable a reliable and direction-independent closing process, in particular even with large opening angles.

The invention achieves the above object with the features of claim 1.

Such a configuration of the locking device has the advantage that the cam forms a cam tip which is arranged eccentrically in the first end position and / or in the second end position with respect to the contour of the cam disk. In this way, with a door opening angle of 180 °, the occurrence of a dead center can be avoided, so that a sufficient closing effect is provided even with such a door opening angle. The cam can be folded over with the curve tip into a first end position or a second end position. The The tip of the cam can be pivoted back and forth relative to the cam disk, starting from a central position, for example by an angle of 10 °. In the first end position and / or the second end position, further pivoting is prevented by a stop. The cam continues the contour of the cam.

Due to the pivotability of the cam and thus the tip of the curve in two directions, the tip of the curve can be eccentric in both directions, i.e. be arranged away from an opening angle of 180 ° of the closer shaft, so that the locking device can be used without modification or conversion for right-hand and left-hand closing doors. The folding movement of the cam is positively controlled by the role of the spring device. Storage is considerably reduced due to the non-directional locking effect. When buying or installing, there is no longer any risk of mix-ups. Because the opening contour on the closer shaft is continued by the cam from approx. 180 ° door opening angle to approx. 190 ° door opening angle, a sufficient closing effect is provided even with a door opening angle of 180 ° or more.

The above approximate details of the opening angle are to be understood in such a way that deviations of ± 5 ° are possible.

The locking device can be used as a door closer, in particular as a floor spring, as an overlying and / or as a concealed door closer.

In concrete terms, the cam can be mounted so that it can pivot eccentrically to the longitudinal axis of the closer shaft. Herewith is a Forced control of the cam by the roller of the spring device is beneficial, since a torque is applied to the cam when there is contact between the roller and the cam and the cam is pivoted into one of the end positions.

Advantageously, the cam can be mounted on or in the recess by means of a pivot axis parallel to the longitudinal axis of the closer shaft. This enables even contact between the cam and the roller of the spring device, so that punctual breakouts on the cam and / or roller due to even loading are largely avoided.

In an advantageous manner, the cam can be symmetrical along a cam axis. This favors the use of the locking device independent of the direction of closing, since even closing effects can be achieved with right-hand and left-hand closed doors. In this way, the same closing moments can be achieved regardless of the closing direction of a door with the same opening angles.

In concrete terms, the cam can have a cross section with a basic shape of an isosceles triangle with three sides that are each curved, in particular convexly curved. This allows the contour of the cam to be continued with simple structural means. The two same legs are symmetrical to the cam axis and are used for contact with the roller of the spring device. The third side is also curved, in particular convexly, and forms a stop with the base or the edge of the recess in the cam, preferably in a first position and a second end position of the cam.

Appropriately, starting from a central position relative to the cam disk, the cam can be pivoted on both sides at an angle of 15 °, preferably 12 °, more preferably 10 °. This creates a sufficiently eccentric arrangement of the curve tip and thus of the dead point by the cam, so that a sufficient closing effect is provided even with a large door opening angle of 180 °, independent of the closing direction.

The cam disk can advantageously be symmetrical along a cam disk axis. The cam disk is designed to be axially symmetrical to the cam disk axis. Thus, the locking device works identically for clockwise and counterclockwise doors, whereby the same closing effects can be achieved with the same door opening angle. A direction-independent use of the locking device is hereby promoted.

A further recess can be formed on the protruding section of the cam, on or in which a further cam is pivotably mounted. The presence of a further cam creates a large contact area between the cam and the roller of the spring device. This can be particularly advantageous in the case of doors that are often opened with large door opening angles, since damage, for example punctual breakouts, is largely avoided due to the uniform and large-area load distribution between the cam and roller.

The cam and the further cam can advantageously be coupled to one another in a rotationally fixed manner by means of the pivot axis. As a result, the cam and the further cam are at the same angle relative to the tip of the curve, so that uniform contact and uniform load introduction between the cams and the roller are promoted.

In addition, a damping device is provided for damping a rotation of the closer shaft, the damping device acting on the cam disk by means of a roller. Comfortable operation of the locking device is thus made possible, since sudden closing or slamming of a door is avoided.

Fig.1

einen Längsschnitt eines ersten Ausführungsbeispiels einer Schließvorrichtung;

Fig.2

in einer perspektivischen Ansicht die Schließerwelle der Schließvorrichtung aus Fig.1;

Fig.3

in einer vergrößerten und geschnittenen Ansicht die Schließvorrichtung aus Fig. 1 bei einem Öffnungswinkel von 180° in einer ersten Schließrichtung;

Fig.4

in einer vergrößerten und geschnittenen Ansicht die Schließvorrichtung aus Fig. 1 bei einem Öffnungswinkel von 160° in einer zweiten Schließrichtung; und

Fig.5

in einer perspektivischen Darstellung eine Schließerwelle für eine Schließvorrichtung gemäß einem weiteren Ausführungsbeispiel.

The invention is explained in more detail below with reference to the figures. Show it:

Fig.1

a longitudinal section of a first embodiment of a locking device;

Fig. 2

in a perspective view of the closer shaft of the locking device Fig.1 ;

Fig. 3

in an enlarged and sectioned view of the locking device Fig. 1 at an opening angle of 180 ° in a first closing direction;

Fig. 4

in an enlarged and sectioned view of the locking device Fig. 1 at an opening angle of 160 ° in a second closing direction; and

Fig. 5

in a perspective illustration a closer shaft for a closing device according to a further embodiment.

Figure 1 shows a locking device for closing a door, which is designated as a whole by the reference numeral 10. In the present exemplary embodiment, the locking device 10 is designed as an overlying door closer for a door leaf.

The locking device 10 is used to close a door (not shown). The closing device 10 has a closer shaft 12, a cam disk 14 connected in a rotationally fixed manner to the closer shaft 12 and a spring device 18 which acts on the cam disk 14 by means of a roller 16 for providing a closing force.

The cam disk 14 has a recess 22 on a section 20 protruding relative to the closer shaft 12. A cam 24 is pivotably mounted in the recess 22.

The cam 24 forms a curve tip protruding from the recess 22. By means of the roller 16 of the With the spring device 18, the cam 24 can be pivoted into a first end position and / or a second end position. The recess 22 is designed as a groove. On both sides of the recess or groove 22, the protruding section has cam disk sections 23a, 23b (see FIG Figure 2 ). A large contact surface for the roller 16 is created by the cam disk sections 23a, 23b. This is particularly advantageous for doors that are opened with large opening angles, but usually not more than 180 °.

The cam 24 is mounted eccentrically to the longitudinal axis 26 of the closer shaft 12 so as to be pivotable.

The cam 24 is mounted in the recess 22 by means of a pivot axis 28 parallel to the longitudinal axis 26 of the closer shaft 12.

The cam 24 is symmetrical along a cam axis 30 (cf. Figure 4 ).

The cam 24 has a cross section with the basic shape of an isosceles triangle with three sides 32, 34 and 36 which are each curved, in particular convexly curved.

The sides 32 and 34 form the legs of the cam 24 which are symmetrical relative to the cam axis 30. The third side 36 has a greater curvature than the sides 32, 34 and serves as a stop in areas adjacent to the sides 32 and 34. In this case, the side 36 comes into contact in sections with a base or edge 38 of the recess (see Figure 3 ).

Starting from a central position relative to the cam disk 14, the cam 24 can be pivoted on both sides by an angle of 10 °. In this case, the pivoting process of the cam 24 is forced to be controlled by the roller 16 of the spring device 18.

If the cam 24 is brought into contact with the recess base 38 by the roller 16 of the spring device 18, the side 34 of the cam 24 continues the contour of the cam disk 14 (see FIG Figure 3 ). The dead center is shifted from an opening angle of 180 ° through the side 34 to an opening angle of 190 °. This ensures a sufficient closing effect even with a door opening angle of 180 °.

The cam disk 14 is symmetrical along a cam disk axis 40 (see Figure 3 and 4th ).

A damping device 42 is provided for damping a rotation of the closer shaft, the damping device 42 acting on the cam disk 14 by means of a roller 44 (see FIG Figure 1 ).

The spring device 18 has a spring piston 46 and a compression spring 48. The roller 16 of the spring device 18 is mounted on the spring piston 46.
The damping device 42 has a damping piston 50 and a damping valve 52. The roller 44 of the damping device 42 is mounted on the damping piston 50.

The locking device 10 also has a housing 54 in which the closer shaft 12, spring device 18 and damping device 42 are arranged. The housing 54 is closed at the end by means of covers 56. The housing 54 is filled with a hydraulic medium.

In the gear area 58, which is located between the spring piston 46 and the damping piston 50, only low pressures of 2 to 3 bar prevail. This is why this area is also referred to as the low-pressure area or the unpressurized area. Operating pressures of approx. 60 to 80 bar (static load) up to peak pressures of 180 bar (dynamic load) prevail in the spring device 18 and in the damping device 42.

The closer shaft 12 can be driven on the output side, namely at an output-side end 60 (see Figure 2 ) be coupled to a door frame by means of a linkage (not shown). The linkage can for example be guided in a slide rail on the door frame side.

Fig. 5 shows an alternative embodiment of the closer shaft 62.

The closer shaft 62 has a cam disk 64 connected to the closer shaft 62 in a rotationally fixed manner. The cam disk 64 has a recess 72 on a section 70 protruding relative to the closer shaft 62, on which a cam 24 is pivotably mounted. The cam 24 forms a curve tip protruding relative to the recess 72.

In addition, the cam disk 64 has a further recess 74 on the protruding section 70, on which a further cam 25 is pivotably mounted. The cam 24 and the further cam 25 are identical.

The cam 24 and the further cam 25 are coupled to one another in a rotationally fixed manner by means of the pivot axis 28. The pivot axis 28 is parallel to the longitudinal axis 26 of the closer shaft 62. As a result, the cam 24 and the further cam 25 move with one another, so that uniform contact with a roller of a spring device is made possible (not shown).

The recess 72 and the further recess 74 each have a base or edge 78 with which the third side 36 of the cam 24 and the further cam 25 come into contact in a first end position and a second end position and form a stop.

Through the recess 72 and the further recess 74, the protruding section 70 has a cam disk section 76. The cam disk section 76 is located between the cam 24 and the further cam 25.

The cam section 76 can also be referred to as a "rib" or "web".

Claims (9)

1. Locking device (10) for closing a door, with a lock shaft (12, 62), a cam disc (14, 64) attached to the lock shaft (12, 62) in a torque-proof fashion and with a spring attachment (18) for generating locking force, whereby the cam disk (14, 64) has a recess (22, 72) on a front section (20, 70) relative to the lock shaft (12, 62), on or in which a cam (24) is kept such that it can pivot, whereby the cam (24) forms a front cam point relative to the recess (22, 72) and whereby a buffer (42) for buffing a rotation of the lock shaft (12, 62) is present, whereby the buffer (42) influences the cam disc (14, 64) via a roller (44), distinguished by the fact that the spring attachment (18) influences the cam disc (14, 64) via an additional roller (16) and that the cam (24) can pivot into a first and/or second end position via the additional roller (16).
2. Locking device (10) as per claim 1, distinguished by the fact that the cam (24) is located off-centre relative to the lengthwise axis (26) of the lock shaft (12, 62) such that it can pivot.
3. Locking device (10) as per claim 1 or 2, distinguished by the fact that the cam (24) is located on or in the recess (22, 62) via a pivot axis (28) parallel to the lengthwise axis (26) of the lock shaft (12, 62).
4. Locking device (10) as per one of the preceding claims, distinguished by the fact that the cam (24) is symmetrical along a cam axis (30).
5. Locking device (10) as per one of the preceding claims, distinguished by the fact that the cam (24) has a cross section with a base form of an isosceles triangle with three curved, in particular convex, sides (32, 34, 36).
6. Locking device (10) as per one of the preceding claims, distinguished by the fact that the cam (24), starting from a middle position, pivots on both sides relative to the cam disc (14, 64) at an angle of 15°, preferably 12°, and more preferably 10°.
7. Locking device (10) as per one of the preceding claims, distinguished by the fact that the cam disc (14, 64) is symmetrical along a cam disc axis (40).
8. Locking device (10) as per one of the preceding claims, distinguished by the fact that there is an additional recess (74) on the front section (20, 70) of the cam disc (14, 64), on which an additional cam (25) is located such that it can pivot.
9. Locking device (10) as per claim 8, distinguished by the fact that the cam (24) and the additional cam (25) are connected to one another in a torque-proof fashion via the pivot axis (28).

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