EP2845985B1 - Gate securing system - Google Patents

Description

The invention relates to a Torsicherungssystem with a light grid arrangement for the detection of objects in the plane of movement of the gate and the gate edge wherein the security system between gate and object.

Torsicherungsysteme of the type mentioned are known from the prior art. These usually form a grid of light barriers within the plane of movement of the door and transversely to the direction of movement of the leading gate edge. In general, the photoelectric barriers are formed by a transmitter strip and a receiver strip which are provided opposite each other for mounting on or in the guide of the gate edge, so that the gate interrupts the photoelectric barriers successively when closing. For this purpose, the known Torsicherungssysteme offer a method with which a distinction can be made between the detection of an object or the gate edge.

The patent filed in 1998 EP 0 902 157 B1 EFAFLEX Transport und Lagertechnik GmbH describes a gate protection system in which the light barriers are assigned three different states sequentially in the direction of movement dynamically as a function of the previously assigned states, whereby the next light barrier located in front of the gate edge is always deactivated.

The patent filed in 2006 EP 1 841 942 B1 CEDES AG describes a Torsicherungssystem in which the next of the gate edge to be traveled light barrier is deactivated as a function of the travel time of the gate edge between the light barriers shortly before crossing the gate edge, in order to ensure a longer sensitivity for the object detection.

The patent pending in 2009 EP 2 229 496 B1 CEDES AG describes a Torsicherungssystem in which the receiver bar includes additional transmitting elements, which detect together with the receiving elements of the receiver strip and a reflector provided on the gate edge, the position of the gate edge, in order to safely exclude a manipulation of the Torsicherungssystems.

The 2011 filed patent application EP 2 586 959 A1 CEDES AG describes a Torsicherungssystem in which the pattern detected by the receiver bar is statically compared with predefined patterns in order to be able to immediately distinguish between object and gate edge even after a failure and restart of the Torsicherungungssystems.

The 2011 filed patent application EP 2 506 034 A1 CEDES AG describes a Torsicherungssystem, in which the light grid is formed of distance sensors and is distinguished on the basis of the detected distance between the object and the door edge.

A disadvantage is the aforementioned Torsicherungssystemen with the exception of CEDES EP 2 229 496 B1 and the CEDES EP 2 506 034 A1 in that the tamper-evident system can be manipulated by inserting a narrow object, such as a rod or an arm, below the gate edge in the path of the gate in such a way that it interrupts only the photocell closest to the gate edge. These Torsicherungssysteme distinguish between gate edge and object essentially by the fact that the light barriers already interrupted by the gate edge as well as the nearest not yet interrupted gate of the gate edge is not or not continuously used for object detection. If the object is guided downwards from the edge of the door or pushed downwards by the edge of the door, the torching system usually recognizes this as a door edge and not as an object. As a result, the object can be damaged and squeezed in particular by the completely closing gate on the ground.

It is an object of the invention to provide an improved Torsicherungssystem ready.

This object is achieved on the basis of Torsicherungssystems of the type mentioned by a Torsicherungssystem according to claim 1 and a door according to claim 10. Advantageous embodiments are specified in the further dependent claims.

The inventive gate securing system serves to protect a gate with a gate edge slidably leading in a plane of movement and in a movement direction against collision with an object and comprises a light grid direction with at least 2 transmitting elements and at least 2 Receiving elements for the formation of light barrier beams in the plane of motion for detecting an object in the plane of movement and the gate edge and further comprises an evaluation device which is adapted to distinguish due to the detection of the light grid device between the object or gate edge and to generate a security signal upon detection of an object and further comprises a position sensor device which is formed separately from the light grid device for detecting a position of the gate and for outputting a position signal which corresponds to a position range of the gate edge, wherein the evaluation device is further adapted to generate a check signal due to the interruption of a particular light barrier beam of the light grid device and wherein there is further provided a control device which is designed to carry out a plausibility check as a function of the position signal and the checking signal gnal and generate a safety signal depending on the plausibility check.

The Torsicherungssystem can have the advantage that when an incorrect distinction of the evaluation that incorrectly assigns the gate edge instead of an object as a cause and therefore incorrectly generates no security signal in an incorrect detection of the light grid device, the Torsicherungssystem still responds safely because now instead of the evaluation, the control device can generate the safety signal. The safety of the door safety system can be increased.

The position signal may preferably be a value from a range of values. The check signal may preferably be associated with the position of a light grid steel. The evaluation device can preferably generate an associated characteristic checking signal, which is assigned to the respective positions of the light grating bars, in each case for a plurality of light grid beams when interrupted

Preferably, the evaluation device is adapted to generate due to the interruption of a particular light barrier beam of the light grid device, a verification signal which is associated with the particular Lichtschrankenstrahl characteristically and a position range of the gate edge on the line of the particular Lichtschrankenstrahls or between the particular Lichtschrankenstrahl and the closed position of the door corresponds and Furthermore, the control device is designed to transmit the safety signal generate when the position signal corresponding position range is outside the position corresponding to the check signal position range

When the verification signal is generated, the particular light barrier should be interrupted by the gate edge or, if the gate body also breaks the light barrier beams in the plane of movement, by the subsequent gate leaves. Then, the position signal should reflect a position of the gate edge at the particular light barrier beam or between the particular light barrier and the closed position of the door. If this is not the case, then there is an unsafe condition of the gate, so that a safety signal is ore eugt.

In sectional doors, the door bodies usually have sectional sections of a certain depth, which usually interrupt the light barrier beams. In the case of film doors, the door body usually has a thin film which usually does not interrupt the light barrier beams.

The position sensor device preferably comprises a rotary encoder and / or one or more end-zone switches.

This can have the advantage that the position sensor device is used repeatedly. The efficiency of the Torsicherungssystems can be increased.

Rotary encoders can be mounted on the drive shaft of the gate and determine the position of the gate edge by means of the unwinding rotation of the gate.

End-of-range switches can act as a cam or curve on the gate edge or the gate body on a switch on the door guide and thus determine the position or a position range of the gate edge.

Preferably, the Torsicherungssystem further comprises a control device in particular for position-dependent control of the speed of movement of the door and / or in particular for the position-dependent deactivation of a hose edge safety at the gate edge. Preferably, the position sensor device is designed to pass signals to at least one further control device, in particular for position-dependent control of the speed of movement of the door and / or in particular for the position-dependent deactivation of a hose edge safety device at the gate edge.

The position-dependent speed control may allow about a deceleration before the closing position. The Torsicherungssystem can have the advantage that it increases the comfort for the user.

Preferably, the evaluation device is connected to the light grid device by a common carrier, in particular by a common housing. Preferably, the control device is connected to the drive control of the door or also connected to the light grid device by a common carrier, in particular by a common housing.

A common carrier or housing can facilitate assembly and increase ruggedness. The Torsicherungssystem can facilitate the assembly and / or increase the robustness against wear.

Preferably, the light grid arrangement is formed so that the particular light barrier beam is disposed at a height between 2 cm and 30 cm, in particular between 5 cm and 20 cm, in particular between 10 cm and 15 cm above the ground.

A low location of the particular beam of light beam can reduce the risk of crushing. Preferably, the lowest light beam beam is not selected so that a slowing down of the gate is still possible. The Torsicherungssystem can reduce the risk of crushing.

Preferably, the position sensor device is designed such that the output of the position signal takes place when detecting the gate about +/- 20 cm, in particular about +/- 10 cm, in particular about +/- 5 cm, in particular about +/- 1 cm, in particular exactly at the position of the gate when the gate edge enters the specific light barrier. The position sensor device is preferably designed so that the output of the position signal takes place during a certain period of time after which the door has reached a specific position.

The range tolerant output of the position signal may increase the stability of the plausibility check. The Torsicherungssystem can increase the system stability.

Preferably, the position sensor device is configured to record the position of the gate associated with a position signal by a learning run of the gate, wherein in particular the one or more check signals are used to detect and / or store the position of the gate,

In this case, the gate can close approximately from top to bottom and when passing and interrupting the or the particular light beam beams, the or the corresponding verification signals are passed to the control device that connects them in their memory with the or simultaneously incoming position signals. The position signals can represent values from a value range that corresponds to the travel path of the gate.

This can reduce the effort during commissioning.

Preferably, the Torsicherungssystem and / or the evaluation device and / or the control device is adapted to stop the gate when the safety signal generated and / or reverse.

The inventive gate comprises a Torsicherungssystem invention of the aforementioned type.

The inventive gate can have the advantages of Torsicherungssystems.

Further features of the invention are indicated in the drawings.

The advantages mentioned in each case can also be realized for combinations of features in the context of which they are not mentioned.

Overview of the drawings:

Fig. 1

ein Tor mit Torsicherungssystem und Endbereichsschalter und

Fig. 2

ein Tor mit Torsicherungssystem und Drehgeber.

Embodiments of the invention are illustrated in the drawings and are explained in more detail below. The same reference numerals in the individual figures designate corresponding elements. Show it

Fig. 1

a gate with Torsicherungssystem and Endbereichsschalter and

Fig. 2

a gate with Torsicherungssystem and rotary encoder.

Detailed description of the drawings:

Fig. 1 shows a gate 1 with a Torsicherungssystem 2 with a Endbereichsschalter 3 on which a cam curve 4 acts. The cam operates the end range switch when the gate edge 5 is in an area between the particular light barrier beam 6 and the ground. A light grid device 7 consists of a transmitter strip 8 with transmitters 9 and a receiver strip 10 with receivers 11 assigned in parallel. The light barrier beams 12 are interrupted by the gate, the specific light barrier beam 6 is interrupted by an object and the light barrier beam 13 is not interrupted. The receivers are connected by a connection 14 to the evaluation device 15, which is located in the housing 16 of the light grid device 7. The evaluation device is connected to the motor controller 17 via a connection 18 via which a security signal can be sent. The receiver 19 of the specific light barrier beam 6 is connected to the control device 21 via a connection 20. The end range switch 3 is connected to the control device 21 via a connection 22. The control device 21 is connected to the motor controller 17 and can also transmit this to a safety signal. The motor controller 17 is connected to the motor 23 which drives the door 1 by rolling or rolling over the shaft 24. The motor control stops and reverses the rolling motor in case of a safety signal.

The object 25 interrupts the determined light beam beam 6. This leads to the detection by the associated receiver 19 and to the generation of a specific light beam beam associated with the verification signal which is transmitted via the connection 20 to the control device. The Endbereichsschalter 3 is not yet switched by the cam curve 4 of the gate. This circuit state of a position of the gate edge 5 even before the specific light barrier beam 6 and is transmitted as a position signal to the control device 21. The control device has the position corresponding to the check signal and the position range corresponding to the position signal stored in the memory. The control device now compares the check signal with the position signal for plausibility as to whether the position range corresponding to the check signal lies within the position range of the position signal. In the present case, this is not the case, since the object 25 and not the gate edge interrupts the particular light barrier beam 6. Because the position range corresponding to the position signal is outside the position corresponding to the check signal position range the control device 21 generates a safety signal which is transmitted to the motor control 17, which stops and reverses the motor 23 and the gate 1

Fig. 2 shows the gate 1 with a Torsicherungssystem 2 with a rotary encoder 26 which is connected to the control device 21. The rotary encoder detects the rotation of the shaft 24 and transmits the rotation to the control device. The control unit calculates the position of the gate and the gate edge from the rotational values. The position corresponding to the gate edge on the particular beam steel 6 is entered or taught the control device. The other structure and mode of action correspond FIG. 1 ,

Claims (10)

1. Gate safety system

   - for securing a gate with a gate edge, displaceably leading along a movement level and in a movement direction, against collision with an object, comprising

   - a light grid means

   - with at least 2 transmission elements and with at least 2 receiver elements

   - for forming light barrier beams along the movement level

   - for detecting an object at movement level and the gate edge;

   - an evaluation means, designed for

   - based on the detection of the light grid means

   - differentiating between object or gate edge

   - and for generating a safety signal when an object is detected;

   - a position sensor means

   - designed separately from the light grid means

   - for detecting a position of the gate, and

   - for issuing a position signal

   - that equals a position area of the gate edge,

   characterised in that

   - the evaluation means is further designed for

   - generating a verification signal based on the interruption of a specific light barrier beam of the light grid means, and

   - in that a control means is provided and designed for

   - carrying out a plausibility test depending on the position signal and verification signal

   - and for generating a safety signal depending on the plausibility test.
2. Gate safety system according to claim 1, characterised in that

   - the evaluation means is designed for

   - generating a monitoring signal based on the interruption of a specific light barrier beam of the light grid means, the same characteristically allocated to the specific light barrier beam and equalling a position area of the gate edge on the line of the specific light barrier beam, or between the specific light barrier beam and the closed position of the gate
   and/or in that

   - the control means is designed for

   - generating the safety signal

   - when the position area equalling the position signal lies outside of the position area equalling the monitoring signal.
3. Gate safety system according to one of the above mentioned claims, characterised in that

   - the position sensor means

   - comprises a rotary encoder and/or

   - one or more end area switches.
4. Gate safety system according to one of the above mentioned claims, characterised in that

   - the gate safety system comprises a further controller,

   - in particular for the position dependent control of the speed of the movement of the gate and/or

   - in particular for the position dependent deactivation of a hose edge protector at the gate edge and/or

   - in that the position sensor means is designed for

   - transmitting signals to at least one further controller,

   - in particular for the position dependent control of the speed of the movement of the gate and/or

   - in particular for the position dependent deactivation of a hose edge protector at the gate edge.
5. Gate safety system according to one of the above mentioned claims,
   characterised in that

   - the evaluation means

   - is connected with the light grid means by a common support, in particular enclosed by a common housing and/or

   - in that the controller

   - is connected with the drive controller of the gate by a common support, in particular enclosed by a common housing, or

   - is also connected with the light grid means by a common support, in particular enclosed by a common housing.
6. Gate safety system according to one of the above mentioned claims,
   characterised in that

   - the light grid arrangement is designed in such a way that

   - the specific light barrier beam is located at a height of between 2 cm and 30 cm, in particular between 5 cm and 20 cm, in particular between 10 cm and 15 cm above the ground.
7. Gate safety system according to one of the above mentioned claims,
   characterised in that

   - the position sensor means is designed in such a way that

   - the issue of the position signal occurs upon detection of the gate at approximately +/-20 cm, in particular approximately +/- 10 cm, in particular approximately +/- 5 cm, in particular approximately +/- 1 cm, in particular exactly at the position of the gate when the gate edge enters the specific light barrier and/or in that

   - the issue of the position signal occurs during a specific time period, after which the gate has reached a specific position.
8. Gate safety system according to one of the above mentioned claims,
   characterised in that

   - the position sensor means is designed in such a way that

   - the position of the gate allocated to a position signal is recorded by a learning movement of the gate,

   - whereby the monitoring signal(s) in particular is/are used for detecting and/or storing the position of the gate.
9. Gate safety system according to one of the above mentioned claims,
   characterised in that

   - the gate safety system, and/or the evaluation means and/or the controller are designed for

   - stopping and/or reversing the gate when the safety signal is generated.
10. Gate with a gate safety system according to one of the above mentioned claims.

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