DE29801107U1 - Closing edge safety device - Google Patents

Abstract

Each door or casement frame (1,2) has in the area of its main closing edge a sensor device (3,4) which is mounted on the frame and moved along with it. The sensor device has a sensor field which extends in the direction of movement of the casement frame in front of the main closing edge and at least with positions of the casement outside of the closing position does not detect the opposite main closing edge. The sensor field can be narrow and is preferably significantly shorter than the maximum opening width of the casement.

Description

Applicant:

Geze GmbH & Co.

Siemensstrasse 21-29

71229 Leonberg

Our reference: G 1534

Closing edge protection

The invention relates to a safety device for securing the main closing edge of a door or window wing or the like with the features of the preamble ^of claim 1.

Such safety devices are known. The closing movement of a driven door leaf, for example a sliding door with two door leaves moving in opposite directions, is stopped and reversed as soon as a person or an obstacle is in the detection range of a sensor that controls the closing movement.

EP O 707 682 B1 describes a sliding door system with an electric drive in which several sensors are attached to the main closing edges of two sliding door leaves moving in opposite directions. These sensors are used to control and monitor the movement of the leaves and can detect an object located in the closing area of the leaves. The sensors emit diffuse infrared light with a wide spread, which is reflected by sensors or reflectors on the opposite leaf or the door frame.

Other known safety systems for the danger zone of a door edge of a driven leaf use capacitive field sensors, reflection of light rays, measurement of the travel time of reflected ultrasound or radar radiation (Doppler principle) to detect people or obstacles at the front or back of the leaf. Such safety systems, in which the closing movement of the leaf is interrupted when a person or obstacle approaches, are known from DE 34 22 228 C2.

The aim of the invention is to create a security system for automatically driven doors, which only stops and, if necessary, reverses the closing movement of the door leaf when an object is actually in the danger area of the closing edge. Furthermore, in preferred embodiments, the security system should be universally usable for different door types, preferably also doors whose opposing door leaves are not moved in a common plane relative to each other.

This object is achieved by the subject matter of claim 1.

The safety device according to the invention has sensors arranged in the area of the main closing edge of each wing, the detection range of which is spatially limited so that the closing edge opposite the respective sensor is not detected until shortly before the closing position is reached. In conventional safety systems, the closing movement is always interrupted and, if necessary, reversed when a person moves through the opening area.

i.

the door is moving or is in the detection range of the sensors. With a safety device according to the invention, the closing movement of the leaf is only stopped when there is an actual danger or possible obstruction of the closing movement. It is therefore easily possible to walk through the opening area of the leaf while the leaves are already closing, without the leaves being stopped. This results in lower electricity costs and an increased service life of the moving elements of the system, particularly in heavily used door systems, since the number of reversal movements of the leaf is reduced compared to conventional systems.

The security system according to the invention can be used advantageously on the main closing edges of door systems in which the two sliding leaves move towards each other at an obtuse angle or in round-arch sliding doors. Such systems are not suitable for the use of conventional security systems in which the sensor radiation is reflected on the opposite closing edge and in which the movement paths of both leaves must therefore lie in one plane.

A security system according to the invention makes it possible to maintain the correct arrangement height specified for light barrier systems. The sensors can be designed simply and inexpensively and can be accommodated in a small installation space. With several sensors, the entire danger area of the leaves can be secured. It is not necessary to adjust the sensitivity of the sensors on site. Temperature fluctuations and other influences that affect the detection range of the sensors are not important, since the detection range is chosen to be wide enough that the door can always reverse safely.

The safety system according to the invention can also be used advantageously in folding doors in which the main closing edge does not move in a straight line during closing or in revolving doors.

Further features and advantages emerge from the embodiments, which are explained in more detail below using the figures.

The invention will now be explained in more detail with reference to the embodiments shown in the figures.

Fig. 1 shows a schematic side view with cutouts of the main closing edges of two sliding door leaves;

Fig. 2 shows a cross-section through a sliding door system, namely an angled sliding door with an obtuse angle between the leaves (top view) in a schematic representation;

Fig. 3 a cross-section through a round-arch sliding door (top view) in a schematic representation.

Figure 1 shows a side view of a sliding door system with two door leaves 1 and 2 moving in opposite directions. The light sensors 3 and 4 are attached to the closing edges of leaves 1 and 2. They have narrowly defined, club-shaped detection areas 3a and 3b. The detection areas are offset in height so that they do not overlap and do not interfere with each other, even shortly before the leaves reach the closed position. The length of the detection area is, for example, approximately 20 cm. The power supply to the sensors 3 and 4 is via trailing cables or busbars with current-transmitting sliding contacts.

This arrangement ensures that the opening area of the door can be accessed even while the leaves are closing without the closing movement being interrupted. The movement of the leaves is only stopped when the light sensors detect an object. This only happens when a danger is actually imminent, but early enough to ensure safe operation of the door in all phases of the movement.

Shortly before the closing position is reached, the detection area can be continuously reduced using an appropriate control device or the light sensor can be switched off completely to enable the door to close completely.

Figure 2 shows a schematic cross-section through a two-leaf sliding door with leaves 5 and 6, which move towards each other at an obtuse angle, so-called angle sliding door. The door has a fixed field leaf 7 or 8 on the secondary closing edge of the leaves 5, 6. The door is equipped with a security device according to the invention in that the light sensors 3 and 4 with the sensor fields 3a and 4a are attached to the leaf in the immediate vicinity of the main closing edges of the leaves 5 and 6. This arrangement makes it possible, despite the obtuse angle between the

wings, to secure the entire movement area of the two main closing edges.

Figure 3 shows a schematic cross-section through a round-arch sliding door with the arched moving leaves 5 and 6, which move on a circular path within the two likewise arched fixed fields 7 and 8. The door is equipped with a security device according to the invention. The light sensors 3 and 4 with the sensor fields 3a and 4a are installed in the immediate vicinity of the main closing edges. The sensor fields are aligned tangentially to the movement path of the leaves and only have a relatively short range. This arrangement makes it possible to secure the entire movement range of the two main closing edges.

Claims (17)

G 1534 Claims 1. Safety device for the main closing edges of oppositely driven leaves by means of at least one electric drive device with a sensor device that, as soon as an object is in its detection area, controls the drive device and the Wing movement preferably brakes, stops and/or reverses, characterized by that each wing has a sensor device arranged on the wing in the area of its main closing edge and moving with the wing, the sensor device having a sensor field which extends in front of the main closing edge in the direction of movement of the wing and does not detect the opposite main closing edge of the other wing, at least when the wing is outside the closed position. 2. Safety device according to claim 1, characterized in that the sensor field is spatially narrowly limited, preferably significantly shorter than the maximum opening width of the wings. 3. Safety device according to one of the preceding claims, characterized in that the sensor device is arranged at least on one wing, but preferably on both wings, wherein it is designed without opposing transmitter-receiver pairs. 4. Safety device according to one of the preceding claims, characterized in that on each of two oppositely moving door leaves a sensor device is arranged on the main closing edges or in the immediate spatial proximity to the main closing edges. 5. Safety device according to one of the preceding claims, characterized in that the sensor fields of the sensor devices are aligned parallel or tangentially, for example tangentially in the case of round doors, to the plane of the driven door leaves. 6. Security device according to one of the preceding claims, characterized in that the sensor field of the sensor devices is aligned in such a way that when the door is closed, the sensor fields of the sensors mounted on the opposite leaves do not overlap, e.g. by arranging them one above the other at an offset height to one another. 7. Safety device according to one of the preceding claims, characterized in that the sensor field of the sensor device has a club-shaped spatial extension with a relatively short range, for example 20 cm. 8. Safety device according to one of the preceding claims, characterized in that the sensor is connected to a switch-off control device and/or has a switch-off control device which switches off the sensor shortly before the door reaches the closed position in order to enable the door to be closed safely and preferably works in reverse when opening. 9. Safety device according to one of the preceding claims, characterized in that the sensor is connected to a range control device and/or has a range control device which reduces the range of the detection area of the sensor shortly before the closed position of the wing is reached, preferably continuously reduces it in order to enable the wing to be closed safely and preferably works in reverse when opening. 10. Safety device according to one of the preceding claims, characterized in that the sensor is connected to an obstruction control device and/or has an obstruction control device which interrupts the closing movement of the wings upon detection of an obstacle which is located in the immediate vicinity of the closing edge, preferably only upon detection of such an obstacle. 11. Safety device according to claim 7, characterized in that the obstruction control device is designed in such a way that an object located outside a certain area of the sensor field does not interrupt the closing movement of the wings. 12. Safety device according to one of the preceding claims, characterized in that the sensor device is attached to or in the immediate vicinity of the main closing edge of a driven angled sliding door, in which the main closing edge and/or the door leaves move towards each other at an angle, for example at an obtuse angle. 13. Safety device according to claim 1, characterized in that the sensor device is mounted on or in the immediate vicinity of the main closing edge of a driven door, for example a sliding door, the closing edges of which move towards one another in a straight line when the door is closed. 14. Safety device according to claim 1, characterized in that the sensor device is attached to or in the immediate vicinity of the closing edge of a leaf, the closing edge of which is not moved in a straight line when the door is closed, as is the case, for example, with so-called space-saving doors or folding doors with, for example, doors with sliding leaves with simultaneous pivoting and sliding movement, in particular so-called space-saving doors, pivoting-sliding doors, folding doors or double-leaf revolving doors with stop pivoting leaves or pendulum leaves that can pivot in the same or opposite directions to one another. 15. Safety device according to claim 1, characterized in that the sensor device is mounted on or in the immediate vicinity of the closing edge of a sliding door with a movable leaf or door leaves moving in opposite directions, the closing edges of which are moved on an arcuate, e.g. circular, trajectory when the door is closed, for example round-arch sliding doors. 16. Safety device according to claim 1, characterized in that the sensor device is arranged on or in the immediate vicinity of the closing edge of a revolving door with revolving door leaves arranged rigidly or so as to be movable relative to one another. 17. Safety device according to claim 1, characterized in that the sensor device has a sensor with ultrasound, infrared radiation, radar radiation or a sensor with a capacitive field sensor.