EP2236732B1 - Gate - Google Patents

Description

The invention relates to a gate according to the preamble of patent claim 1.

Gates of this type are used, for example, in factory buildings for the separation of different production areas, as a room closure or in the form of garage or industrial doors. In the case of so-called sectional doors, the door leaves may have a number of pivotally interconnected door leaf elements which are arranged approximately in a vertical plane in the closed position and approximately in a horizontal plane in the open position. In particular, in the separation of different production areas in production halls so-called film doors are used, in which the door leaf is formed in the form of a compliant web-shaped curtain, which is arranged in the closed position approximately in a vertical plane and in the open position on or behind the fall of the opening to be closed is wound on a winding shaft. Furthermore, such goals are used, in which the door leaf consists of hingedly interconnected slats, which are also wound in the closed position to form a multi-layered winding. In the last-described door types the predetermined path runs approximately in the direction of gravity, so that the leading edge in the closing movement of the door leaf rests in the closed position at the bottom of the opening to be closed with the door leaf.

In order to avoid personal injury and property damage measures must be taken in the described gates, with which the Torblattbewegung can be stopped as soon as a person and / or an object enters the area of the predetermined path. In this context, for example, the use of so-called contact rails on the leading edge of the door during the closing movement and the use of light barrier arrangements has become known. Corresponding goals are, for example, in the DE 20 2007 003 199 described.

As explained in the cited document, in particular in the operation of roller shutters or film doors must also be thought of the case in which the door leaf, for example. By impact of a forklift od. Like. Leaving the predetermined path. In this case, the Torblattbewegung must be stopped immediately to avoid further damage. For this purpose, the use of switches is proposed in the cited document with which the impact of a vehicle od. Like. Detected on the door leaf and a corresponding interrupt signal or control signal can be generated. However, it has been shown that the use of appropriate switch leaving the predetermined path can not be reliably detected.

Gates according to the preamble of claim 1 are in the DE 197 39 544 A1 specified. It has been found that the provision of safety devices according to this document is associated with relatively high costs for gates with a high height.

In the DE 299 01 664 U1 a lifting gate with light grid monitoring device is described, in which the monitoring device has a single light grid, which is arranged within the Torhubbereichs limited by the Toraußenflächen, and the evaluation has an algorithm generator, from the lifting speed of the gate, from a stored signal pattern of one or more previous measuring cycles, the time interval between two successive measuring cycles and the distance between adjacent light beams between an interruption by the gate itself or by distinguishes an object by then closing on an object located in Torhubbereich when, starting from the Torschließkante, the number of light beams continuously interrupted between the stored signal pattern and the current signal pattern differs by more than a Torhubbewegung variable number of interrupted light beams or if there is no complete coverage of the light rays from the Torschließkante ago.

Also in the case of the gates known from this document, it has proved to be problematic that the receipt of the desired security function is associated with high-altitude gates with a high cost.

In the DE 20 2007 003 199 U1 a gate is described with a predetermined path between a open position and a closed position movable door leaf and an operable to control the Torblattbewegung control device, along which a substantially rectilinear portion having predetermined portion, wherein the control means on the door leaf, esp. In the area of the at Having closing movement leading edge of the door leaf, mounted and operable to deliver wirelessly transferable control signals in an approximately parallel to the rectilinear portion of the predetermined path oriented signal propagation direction operable transmitting device.

In view of these problems in the prior art, the invention is based on the object, gates, in the operation od damage caused by the impact of vehicles. The like. During a closing movement without excessive effort can be minimized and provide appropriate monitoring procedures.

According to the invention this object is achieved by the specified in the characterizing part of claim 1 development of the known goals.

This invention is based on the knowledge that the departure of the predetermined path can be detected by using the known light grid by evaluating the time sequence of the interruption or release of the individual signal paths. Additional mechanical switches that are susceptible to interference are not required. Therefore, an improvement of the operational reliability, esp. In connection with the detection of leaving the predetermined path, can be achieved by the inventively proposed development of the known goals. To avoid further damage, the door leaf movement is preferably stopped immediately in response to the first control signals, so that a controlled return of the door leaf to the predetermined path can take place. To evaluate the timing of the Interrupting the signal paths, the control device of a gate according to the invention expediently an evaluation circuit for evaluating the time sequence of the interruption of the signal paths in the course of Torblattschließbewegung and for generating the first control signals in case of deviations of the temporal sequence of a predetermined time sequence. The evaluation circuit can be implemented particularly simply if it is designed to generate control signals as soon as the time interval between the interruption of successive signal paths exceeds a predetermined time interval.

In the context of the invention, it has proved to be particularly advantageous if the light grid used in the invention can perform a dual function, with the not only leaving the predetermined path, in response to the impact of a vehicle on the door leaf, but also the intrusion of persons or objects can be detected in the range of the predetermined path. For this purpose, the control device according to the invention gates is expediently designed for generating second control signals at a not caused by the Torblattbewegung interruption of at least one signal path, wherein preferably in response to the second control signals, a reversal of the Torblattbewegung is triggered, so as may have already made contact with the door leaf the object or person. In gates according to the invention, a predetermined chronological sequence of the interruption of the signal paths is usually stored. In this case, a not caused by the Torblattbewegung interruption of at least one signal path can be detected when this interrupted signal path along the predetermined path in the closing direction is arranged behind a signal path that has not yet been interrupted by the Torblattbewegung. Such an interruption can then only have been caused by an object or a person entering the predetermined path.

The transmitter arrangement of a door according to the invention can be particularly simple if it has at least one light source, such as an LED or a diode laser. To detect the interruption of a signal path is expediently designed to receive the signals propagating along the signal paths and preferably at least one photocell, such as a photodiode having receiver arrangement provided with the corresponding in response to the impact of propagating along the signal paths corresponding reception signals and can be applied to the controller. Expediently, the transmitter arrangement and / or the receiver arrangement is in the region of a preferably approximately parallel to the predetermined path extending edge of the door leaf to be closed opening attached, wherein the receiver assembly is preferably mounted in the region of the transmitter array having the edge opposite edge of the opening.

In the case of gates according to the invention, with regard to the desired increased operational reliability, preferably at least one lateral edge of the opening to be closed with the door leaf is arranged, approximately parallel to the predetermined track, in particular in the direction of gravity, and at least one lateral edge of the door leaf in the closed position a horizontal sectional plane cross-leadership arrangement provided for guiding the Torblattbewegung. In this case, the transmitter assembly and / or the receiver assembly may be protected from damage so as to further increase operational reliability when the transmitter assembly and / or the receiver assembly is disposed within the guide assembly. In this case, the guide arrangement can be designed substantially U-shaped with a connecting leg and extending from the lateral edges of the connecting leg in the direction of the door leaf to be closed space extending side legs, wherein a lateral edge of the door leaf is received in the closed position between the side legs , On the other side facing away from the connecting limb edges of the side legs on the other hand on the door leaf in the closed position fitting, for example. Brush-shaped sealing arrangements can be attached. A particularly reliable protection of the inventively provided transmitter assembly and / or receiver assembly is achievable if this transmitter assembly and / or the receiver assembly is attached to an opening facing the boundary surface of the connecting leg, because this place within the guide assembly furthest from the ingress of dirt and / or moisture in the guide assembly permitting and serving to receive the side Torblattrandes opening of the guide assembly is removed.

As already explained, the invention can be used with particular advantage if the door leaf can be wound onto a winding shaft in the course of the opening movement and is preferably designed as a resilient web-shaped curtain, wherein the edge of the strip-like curtain leading to a closing movement counteracts a deformation of this edge. preferably elastically deformable stabilizing arrangement is mounted, wherein the deformation in the closing direction counteracting restoring force of the stabilizing arrangement is less than the deformation transverse to a counteracting restoring force, and the stabilizing arrangement preferably at least one preferably embedded in an elastomeric material leaf spring having transversely oriented to the closing direction major surfaces.

In the embodiments described so far, both the first control signal and the second control signal can be generated by monitoring the propagating along the parallel to the leading edge in a closing movement of the door leaf and in Torblattbewegungsrichtung successively arranged signal paths propagating signals. The light grids used in these embodiments also for generating the first control signals usually extend only up to a height of about 2,500 mm, while the protection function achieved by the first control signals is still required even at higher gates.

For this purpose, the height of the light grid could be increased. However, this is associated with a great deal of extra work. According to the invention, a signal is provided along a parallel to the rectilinear portion of the predetermined path in particular vertically propagating signal, the signal path is interrupted during trouble-free operation by the leading edge during the closing movement of the door leaf, so that an impact on the door leaf and thus connected Leaving the predetermined path with the help of the corresponding signal or the detection of this signal can be detected. The corresponding light source and / or detection arrangement can be housed protected within the guide assembly.

The light source may be a one-way infrared light barrier, a reflector light barrier, a laser or the like. It is important that by the evaluation of the signals originating from this light source, the change in the leading edge of the door leaf (lower part) during the closing movement is unambiguously and reliably detected and fluctuations of the lower part by the running motion or by wind do not lead to malfunctions. For unambiguous detection of leaving the predetermined path, for example by impact of a vehicle, it is expedient to install a light source on each of the two mutually opposite sides of the opening to be closed with the door leaf opening vertical guides.

For limited security (cost-saving), the light source intended to generate a signal propagating parallel to the predetermined path can also be applied only to one side of the door leaf. As soon as the lower edge of the door leaf leading in the closing movement leaves its path predetermined by a guide arrangement, the signal propagating along the predetermined path changes and the door is stopped in response to the first control signals being triggered.

In a collision of a person or an object both first and second control signals can be triggered. Is it just a light touch, wherein the door leaf does not leave the predetermined path, only second control signals are triggered and reversal of the door leaf movement is triggered in response to the second control signals. Leaves the leading edge during the closing movement (lower part) in response to an impact the predetermined path, both first control signals and second control signals are triggered. To avoid damage to the door, in this case the door leaf movement is stopped, ie the first control signals superimpose the second control signals.

As a particular advantage of the invention gates is to emphasize that no electrical components, such as contact rails, crash switch, wireless transmission systems o. The like. Are attached to the movable closing edge, since all required to trigger the control signals equipment parts (light sources, detection devices) to permanently installed Components (side panels) are attached. The system is therefore very robust against moisture, wind load, temperatures and wear, which makes gates of the invention compared to conventional doors with spiral cables or battery-based wireless systems seem advantageous.

In the context of the invention, it is also conceivable to realize all signals propagating both parallel to the edge leading in the closing movement and signals propagating parallel to the predetermined path by means of signal sources in one component. This results in a compact design with only one signal transmission. The signal transmission is generally realized by a permanently installed cable. It is also possible to make the connection wirelessly.

To increase the reliability of gates according to the invention, the first control signals may additionally or alternatively also be actuated by actuating at least one lateral edge of the door leaf extending parallel to the predetermined path and / or in the region of a lateral edge extending approximately parallel to the predetermined path be created with the door leaf opening to be closed attached mechanical switch, esp. Spring switch. In this embodiment of the invention, the function of the evaluation of the longitudinally approximately parallel to a leading edge in the closing movement of the door leaf signal propagating signals remain unchanged. However, a mechanical switch, esp. Spring switch, is installed as an additional securing element. Such switches can be mounted on both lateral edges of the door leaf and / or the lateral edges of the opening to be closed with the door leaf extending parallel to the predetermined path. The spring switches are compressed when the door leaf leaves the predetermined path. In response to the compression of the spring switch For example, a radio module can be activated mechanically with which a signal is transmitted to a receiver, in response to which the first control signals can be generated. The receiver for the radio signals can be integrated into a side part of the door. It can also be accommodated directly in the controller which can be operated to generate the second and / or first control signals.

In connection with this embodiment of the invention, it should be mentioned that the power consumption is less than the self-discharge of a battery. Therefore, a radio transmitter can be integrated with a battery in the mechanical switch, esp. Spring switch, the components can be completely shed. The radio transmitter is activated in this embodiment of the invention only when the mechanical switch, esp. Spring switch is compressed and then transmits a defined signal to the controller, which generates the first control signals in response to this signal. Transmitter and receiver are taught each other during commissioning. Therefore, any number of gates can be operated side by side.

Figur 1

ein Tor gemäß dem Stand der Technik und

Figur 2

ein Tor gemäß einer Ausführungsform der Erfindung.

The invention will be explained with reference to the drawing, to which reference is expressly made with respect to all essential to the invention and in the description unspecified highlighted details. In the drawing shows:

FIG. 1

a gate according to the prior art and

FIG. 2

a gate according to an embodiment of the invention.

This in FIG. 1 shown gate comprises two guide assemblies 10, 20 for guiding the movement of a door leaf, not shown in the drawing. Each of the guide assemblies is substantially U-shaped with a connecting leg 12, 22 and starting from the lateral edges of the connecting leg 12, 22 outgoing side legs 14, 16; 24, 26 executed. At the connecting legs 12, 22 facing away from edges of the side legs 14, 16; 24, 26 brush-shaped sealing arrangements 18, 28 are arranged, which abut in the Torblattschließstellung at the then between the side legs 14, 16 and 24, 26 received door leaf. A transmitter assembly 30 having a plurality of light sources for generating longitudinally parallel to the edge of the door leaf leading in the door leaf closing movement and arranged successively in the direction of the predetermined path is mounted on the boundary surface of the connecting leg 12 facing the door leaf 2 to be closed by the door leaf. On the other hand, at the to be closed with the door leaf Opening 2 facing boundary surface of the connecting leg 22 of the guide assembly 20, a receiver assembly 40 mounted for the output from the transmitter assembly 30 light beams.

This in FIG. 2 Tor shown differs essentially by the basis of the FIG. 1 Tor explained that in addition to the light sources provided for generating the light source 100 also light sources for generating along the predetermined path propagating vertical signals 110 and corresponding sensor arrangements are provided. Between the signals 110 propagating along the vertical section of the predetermined path and the corresponding sensor arrangements, the edge of the door leaf leading in the closing movement is arranged in the event of trouble-free operation. If signals 110 are detected by the respective sensor arrangements, this is due to the fact that the leading edge during the closing movement has left the predetermined path. Then the gate is stopped immediately.

Claims (15)

1. A gate comprising a gate leaf that can be moved along a pre-defined track that preferably has a section running substantially in a straight line between a closed position and an open position and a control device that can be operated to control the movement of the gate leaf and that is designed to generate first control signals serving to stop the movement of the gate leaf upon leaving the pre-defined track and to generate second control signals, a reversal of the gate leaf movement being able to be triggered in response to the second control signals, a transmitter arrangement (30) being assigned to the control device in order to generate two, three or more signals that respectively run along approximately perpendicular to the pre-defined track and approximately parallel to an edge of the gate leaf which precedes during a closing movement and that spread over signal paths arranged one behind the other in the direction of movement of the gate leaf, the signal paths being interrupted chronologically one after the other over the course of the closing movement and/or being released chronologically one after the other over the course of an opening movement, in particular by the edge of the gate leaf that precedes during the closing movement, the control device preferably being designed to generate the second control signals during an interruption of at least one signal path not caused by the movement of the gate leaf, characterised in that the control device is assigned at least one transmitter arrangement for generating at least one signal spreading along a signal path running approximately parallel to the pre-defined track preferably in the region of the guide arrangement, the signal path being interrupted by the edge of the gate leaf which precedes during the closing movement along the pre-defined track and the control device being able to be operated to generate first control signals in response to the release of the signal path running along parallel to the pre-defined track.
2. The gate according to Claim 1, characterised in that the control device has an analysis circuit for analysing the chronological sequence of the interruption of the signal paths over the course of the gate leaf closing movement or the gate leaf opening movement and for generating the first and/or second control signals if there are deviations of the chronological sequence from a pre-defined chronological sequence.
3. The gate according to Claim 2, characterised in that the analysis circuit is designed to generate the first and/or second control signals as soon as the chronological distance between the interruption of sequentially following signal paths exceeds a pre-defined chronological distance.
4. The gate according to any of the preceding claims, characterised in that the transmitter arrangement (30) has at least one light source, such as for example an LED or a diode laser.
5. The gate according to any of the preceding claims, characterised by a receiver arrangement (40) designed to receive the signals spreading along the signal paths and preferably having at least one photocell, such as for example a photodiode.
6. The gate according to any of the preceding claims, characterised in that the transmitter arrangement (30) and/or the receiver arrangement (40) is fitted in the region of an edge of the opening that is to be closed by the gate leaf and that preferably extends approximately parallel to the pre-defined track, the receiver arrangement (40) preferably being fitted in the region of the edge of the opening lying opposite the edge that has the transmitter arrangement (30).
7. The gate according to any of the preceding claims, characterised by at least one guide arrangement (10, 20) disposed on the lateral edge of the opening to be closed by the gate leaf and extending approximately parallel to the pre-defined track, in particular in the direction of gravity, and in the closed position overlapping at least one lateral edge of the gate leaf in a horizontal cutting plane, for guiding the movement of the gate leaf, the transmitter arrangement (30) and/or the receiver arrangement (40) being disposed within the guide arrangement (10, 20).
8. The gate according to Claim 7, characterised in that at least one guide arrangement (10, 20) is made essentially in a U-shape with a connection leg (12, 22) and side legs (14, 16; 24, 26) extending from the lateral edges of the connection leg (12, 22) in the direction of the space to be closed by the gate leaf, a lateral edge of the gate leaf being held between the side legs (14, 16; 24, 26) in the closed position.
9. The gate according to Claim 8, characterised in that the transmitter arrangement (30) and/or the receiver arrangement (40) is fitted to a boundary surface of the connection leg (12, 22) that is facing the opening.
10. The gate according to any of the preceding claims, characterised in that the gate leaf can be wound onto a winding shaft over the course of the opening movement and is preferably made as a pliable track-shaped curtain.
11. The gate according to Claim 10, characterised in that on the edge of the track-shaped curtain which precedes during a closing movement, a preferably elastically deformable stabilisation arrangement is fitted that counteracts the deformation of this edge.
12. The gate according to Claim 11, characterised in that the reset force of the stabilisation arrangement that counters the deformation in the closing direction is less than the reset force that counters a deformation transversely to the latter.
13. The gate according to Claim 12, characterised in that the stabilisation arrangement has at least one leaf spring, preferably embedded in an elastomer material, with main surfaces aligned transversely to the closing direction.
14. The gate according to any of the preceding claims, characterised in that the control device is designed to stop the movement of the gate leaf if both a first control signal and a second control signal is generated.
15. The gate according to any of the preceding claims, characterised in that the first control signals can be generated in response to activation of at least one mechanical switch, in particular a snap switch, that is fitted to at least one lateral edge of the gate leaf that runs parallel to the pre-defined track and/or in the region of a lateral edge of the opening that is to be closed by the gate leaf and that extends approximately parallel to the pre-defined track.

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