DE29509233U1 - Device for operating doors - Google Patents

Description

Company Neudecker & Jolitz GmbH & Co., Venneweg 28, 48712 Gescher

"Device for operating doors" 5

The innovation relates to a device for operating doors according to the preamble of the main claim.

Such devices have been known for a long time and are, for example, arranged above a door on the solid masonry and are connected to the door, for example, via a rod. These door operating devices can open a door independently due to a drive when a person approaches the door and comes into the range of a door opening sensor, and then these operating devices ensure

devices for closing the door again. Such door operating devices are used in many different places, for example in clinics, public buildings, etc.

Appropriate door opening devices can also be

Support the door being pushed open, for example using a gas pressure cylinder, and then also ensure that the door is closed.

In order to close the open door, it is known to use this operation

to provide the locking devices with a torsion spring that is tensioned when the door is opened and then closes the opened door again and relaxes in the process. The connecting means between these spiral springs and the components that cause the spring tension is, for example, a

A rod device is known, but this is disadvantageous due to its size. Due to the size of the rod required, it is necessary to make the entire actuating device larger and this is in line with the general desire to make these actuating devices as small as possible.

The well-known design with a rod for tensioning the closing spring is also relatively sensitive to wear and this has a negative effect on frequently used door openers after many years of use.
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The innovation is based on the task of creating an operating device for doors that is small in size and, moreover, wear-resistant even after many years of use.
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This problem underlying the innovation is solved by the teaching of the characterizing part of the main claim.

In other words, an actuating device

A device is proposed in which the force is transmitted via a rotating element to wind up the spiral spring and vice versa when the spring is released to close the door. This can be, for example, a chain, a toothed belt or a corresponding combination of

gears.

An embodiment of the innovation is shown below in the drawing, where 1 represents an actuating device that is connected to a door 3 via a toggle lever 2.

The actuating device 1 essentially consists of an electric motor 4, which drives a bevel gear 6 via a gear 5. A bevel gear 7, which is arranged on a drive shaft 8 in a rotationally fixed manner, engages in this bevel gear 6. On the side of the drive shaft 8 opposite the bevel gear 7, a

Gear 9 is arranged on which a drive chain 10 is guided. The drive chain 10 is in turn guided on a gear 11, which is arranged on a spring shaft 12, whereby a spiral spring 14 is also guided on this spring shaft 12, which is fixed on the spring shaft 12 and on a carrier 19.

The carrier 19 carries the spring shaft 12 and can be removed after loosening

of screws 20 to tighten the drive chain.

On the electric motor 4, which is advantageously a direct current motor, there are two power supply lines 15 and 16

which are connected to a circuit 17. Connections 18 for the electric motor are also provided, which come from sensors and the like, for example.

The functionality of the illustrated actuator

is as follows:

If, for example, a person approaches the door 3 to be opened, this movement is detected by a sensor and the electric motor 4 is started by the connections 18. The

The electric motor 4 rotates the bevel gear 6 via a drive shaft and this rotary movement is transmitted via the bevel gear 7 to the drive shaft 8, which pivots the toggle lever 2 and thereby opens the door. In addition, the rotary movement of the drive shaft 8 is transmitted to the gear 9 via

and therefore causes a rotation of the drive chain 10 and, through the transmission to the gear 11 and thus to the spring shaft 12, a pre-tension of the spiral spring 14.

The door 3 is kept open by an electromechanical^

brake mounted on the B-side of the rotor. Preferably, a working current operated brake should be used here to ensure closing in the event of a power failure. Alternatively, the brake can be kept open for a shorter time by reducing the motor voltage (holding voltage).

happen.

After a preset time, the closing movement of the door 3 begins. The motor 4 is switched off and the spring force of the pre-tensioned spring 14 is transmitted via the drive chain 10 and the

Drive shaft 8 is transferred to the knee lever 2 and causes the door 3 to close.

The proposed actuating device 1 provides a particularly easy-to-manufacture device for opening and

Closing of doors is possible and, in addition, this actuating device 1 is particularly wear-resistant and practically maintenance-free.

To prevent the door 3 from slamming too hard due to the spring

voltage, it is possible to bridge the two power supply lines 15 and 16 of the motor 4 using the circuit 17, so that with the motor connections 15, 16 bridged in this way it is possible to operate the electric motor 4 as a generator. This generator effect of the electric

The electrical motor 4 causes a damping effect when the door is closed and prevents the door 3 from slamming shut too quickly. It is particularly advantageous to remove this bridging of the power supply lines 15 and 16 when the door 3 is almost closed, so that the door 3 is closed shortly before closing.

is closed more quickly because the inhibition of the electric motor 4 running as a generator is no longer present, which is advantageous because the door 3 is now pulled forcefully into the lock.

Instead of the drive chain 10, for example, a link belt, crawler belt or the like can be used.

Instead of the spring 14 as a tensioning element, it is possible to use, for example, a gas pressure cylinder or the like.

The actuating device 1 shown in the drawing is merely an embodiment of the innovation and of course the innovation can also be adapted to the different requirements of the respective local conditions.

They can be designed differently without leaving the realm of innovation.

Claims (9)

Protection claims: 1. Device for operating doors, with a drive that is connected to the door via connecting elements and one or more tensioning elements that are directly or indirectly connected to the connecting elements by one or more force transmission elements wherein a movement of the connecting elements results in a tension and relaxation of the clamping elements in favour of a tension of the clamping elements when opening the door and a relaxation when closing the door, characterized by one or several rotating power transmission elements. 2. Device according to claim 1, characterized by a drive chain (10) as a power transmission element. 3. Device according to claim 1 or 2, characterized by an electric motor (4) as drive. 4. Device according to claim 3, characterized by a drive shaft (8) driven by the drive, on which both a door connecting element and a gear wheel (9) for the drive chain (10) are arranged. 5. Device according to claim 4, characterized by the arrangement of the drive shaft (8) between the clamping element and the drive. 6. Device according to one of the preceding claims, characterized by one or more springs (14) as tensioning element. 7. Device according to one of the preceding claims surface, characterized by the arrangement of the spring (14) on a spring shaft (12) which can be driven via a gear wheel (11) which is also arranged on the spring shaft (12). 8. Device according to claim 4, characterized by a bevel gear (7) on the drive shaft (8) which is designed to engage with a bevel gear (6) driven by the drive. 9. Device according to one of the preceding claims, characterized by a circuit (17) connected to the electric motor (4), to which the terminals (15, 16) of the electric motor (4) are connected, wherein via the circuit (17) a transfer bridging of the power supply lines (15, 16) of the electric motor (4).