DE102005061554A1 - Gate, especially high-speed door, with photocell - Google Patents

Abstract

A door (1), in particular a high-speed door, comprises a door leaf (10) which has a closing edge (12) and which can be moved within a travel path by means of a drive. A first light barrier (20) is arranged at a distance (A) from the closing edge (12) and detects objects or body parts present in the route. Furthermore, at least one second light barrier (30) is provided, which is arranged at a predetermined distance (B) from the closing edge (12) in an area (C) between the first light barrier (20) and the closing edge (12).

Description

The The present invention relates to a gate, in particular a high-speed door with a door leaf, which has a closing edge and the means a drive is movable within a travel path. A first light barrier is arranged at a distance from the closing edge and detects objects present in the travel path or Body Parts.

The when used in such a gate coming to use light barrier as anti-trap, i. as a safeguard against pinching objects or body parts during the closing of the Gate. Thus, when the light beam is interrupted, the light barrier becomes generates a control signal that slows down the drive and possibly in reversed the opposite direction.

From the EP 0 284 066 B1 is a high-speed door is known, which is provided with a switching device consisting of a light barrier, which is used as anti-trap. Here, the transmitter and a receiver having light barrier is arranged at a certain distance below a final profile of the door leaf, this distance corresponds to the Abbremsweg. The Abbremsweg is also referred to as caster and is composed of the switching delay and the braking distance. The transmitter and the receiver are each attached to a movable stamp.

at this known high-speed door, it has proved to be disadvantageous that at a distance from the closing edge of the door leaf arranged Photocell during the closing process always only the area between the photocell and the lower termination of the gate, the regular through the soil is formed, monitor can. A surveillance of the area between the photocell and the closing edge of the Torblattes is not possible. This disadvantage has a special effect if, as nowadays an ever-growing one Need for increase the closing speed such gates is present. This is due in particular to the fact that a higher one closing speed the door leaf a greater Abbremsweg requires, whereby the distance between the light barrier and the closing edge be enlarged as well got to. This will cause the unmonitored Area even bigger. Come in addition, that also with regard to ever stricter safety regulations and standards additional Safety measures in terms of the anti-trap protection are necessary. Next is in the known Gate a sliding guide for the in the closed state provided the gate in the end profile immersing photocell. Such a sliding guide is complicated and expensive to manufacture, is susceptible to dirt and not completely maintenance-free.

Of the The invention is based on the object of providing anti-pinch protection. which offers a high level of security.

to solution this task is in accordance with claim 1, the aforementioned gate according to the invention by at least one second photocell is marked in one predetermined distance from the closing edge in an area between the first photocell and the closing edge is arranged.

The The idea of the invention is therefore the anti-trap protection to improve at least two photocells, the second photocell is provided at a predetermined distance from the closing edge and wherein this distance is less than the distance between the first light barrier and the closing edge is. In this way, the door leaf with - seen in the closing direction - several leading photocells provided as an anti-trap providing light curtain or light grid.

Under a light barrier in the context of the present invention are all Devices understood by the use of light or the same radiation in the form of light rays (also infrared or Ultraviolet) or the like radiation or light bundles or other bundles of electromagnetic Art are set up so that a present in the area of the light beam Object, such as an object or a body part, is detected as a result of the interruption of the light beam. In the event of the detection of such an object, a control signal is generated, to stop and / or reverse the drive of the door. The light beam can by all known radiation or light sources, such as Lamps, LEDs or lasers are generated. As long as related with the present invention, not explicitly to the first light barrier or the second photocell or any other photocell reference is taken, the relevant statements concern one or more of these photocells. The same applies in connection with the individual components of the light barriers and with respect to the Conceptual "ray of light".

With the gate according to the invention increased safety in terms of anti-trap protection is achieved compared to the prior art, as well the area between the first light barrier and the closing edge can be monitored by means of at least one second light barrier. This proves to be particularly advantageous when an object with high speed Ge moves to the door and reaches the door to be closed door opening at a height between the first light barrier and the closing edge. This case is conceivable, for example, in a forklift whose forks could enter exactly this area between the first light barrier and the closing edge.

advantageous Embodiments of the invention are described in the subclaims.

A preferred embodiment is that the distance between the second photocell and the closing edge smaller than 50 mm. This distance corresponds to an object size, the according to safety regulations of a anti-trap device must be recognized.

From Another advantage is when the distance between the closing edge and the first light barrier and / or the distance between the closing edge and the second photocell changeable are. In this way, the distance or the distances can the speed of the door leaf and / or to specified conditions from domestic or foreign Safety regulations are adjusted.

A preferred embodiment is that at least one light barrier with the door leaf mitbewegend is arranged. For example, the photocell can be connected via a Chain, which is coupled to a drive shaft of the door leaf, to be moved. In such an embodiment is then so no direct rigid component connection between the light barriers and the door leaf. Most preferred, however, is a co-movement through Coupling or attachment to the door leaf.

According to one another preferred embodiment At least one light barrier is movable relative to the door leaf. So here is at least at times a staggered movement of Gate leaf and photocell instead. For example, when closing the Torblattes first the photocell and temporally offset to that Torblatt be moved, so the distances of the photoelectric sensors to the closing edge and the distances to adjust the photocells with each other.

Preferably is at least one light barrier by the drive for the door leaf movable. Thus, the rotation of a drive shaft of the Torblattantriebes be converted into a translatory movement of the light barrier, for example with a chain. Alternatively, the photocell but also driven separately and the drives of the light barrier and the door leaf are matched. When arranged on the door leaf Photocells can this by gravity or by a biasing element in its functional position be brought and when moving in closing position by the resistance on the ground or the other opening boundary in a withdrawn Position pressed become.

In a further preferred embodiment includes the first light barrier and / or the second light barrier at least one transmitter emitting a beam of light, and at least a receiver, which receives the light beam. in principle So a transmitter is sufficient to emit a beam of light. this makes possible a cost saving.

Preferably indicates the closing edge a first end and a second end, the transmitter being in the range the first end and the receiver are mounted in the region of the second end. Alternatively to this can be provided that the transmitter and the receiver in Area of the first end and a reflector in the area of the second End are attached. In this way, transmitters and receivers in in close proximity to be arranged adjacent. As a reflector is preferably a Mirror element used. But it can also be the door frame itself or a ge on the Torzar applied, reflective film as Reflector to be used. Both transmitting and receiving unit as also reflector unit of each light barrier could relative to the door leaf be arranged to be able to lead in front of the closing edge. In a Another embodiment is also conceivable that only one transmitter and / or a receiver for both photocells is provided, wherein reflectors the light beam - completely or shared - several times, with Guide the distance back and forth in front of the closing edge, so an anticipatory light barrier curtain with at least two Generate rays. Here, too, a movable, preferably takes place moving suspension, in order to monitor an overfeed during operation only in the predetermined area in front of the shooting edge, in the closed state though a contact of the closing edge with the opening boundary to allow.

In order to realize a practical implementation of the leading photocells, an arm is attached to the door leaf in the region of the first end and / or in the region of the second end, wherein the arm has at least one transmitter and / or at least one receiver and / or at least wearing a reflector. In principle, at least one arm can be provided. Latter Variant then proves to be particularly useful when the single arm has the transmitter and the receiver and along the opposite door frame a reflector is mounted.

Around the distances the first and second photocells from the closing edge change, It is advantageous if the arm has a groove by means of the Transmitter or the receiver or optionally a reflector at different positions can be fixed for example by means of a screw connection.

Farther a configuration may be provided in which at least one Arm is movably arranged in a cavity of the Torzarge and over a Driver with the closing edge communicates.

Prefers the arm is in one of the closing edge in the closed position facing completion of the gate to be closed by the gate opening retractable. Such a conclusion is usually by a bottom-side Profile formed with a recess for receiving the arm is provided.

In a further preferred embodiment the arm is relative to an operating position to a rest position to the closing edge movable. Preferably, this is achieved by the arm around a parallel or perpendicular to the closing edge aligned axis is pivotable from the operating position to the rest position. Of the Position change can also be achieved by the arm more Has partial arms and / or multiple joints. Preferably, these are Partial arms telescopically slidable. To the position change to manage the arm, it is advantageous if the arm by means of a spring from the operating position in the rest position or vice versa can be brought. So, for example a compression spring may be provided which, in the transition from the operating position, i.e. in an at least partially open gate, in the rest position, i.e. at a closed gate, undergoes a bias. Thereby will when opening the gate of the arm automatically from the rest position to the operating position emotional.

at an arrangement of several joints, the arm has several arms part with intervening joints on. For example, with a four - jointed chain a nearly vertical movement of the arm of the Photocell be enabled. The movement of the individual partial arms can preferably by a or more spring are affected. One of the kind Mehrgelenkkette let yourself also practical to implement, since the entire mechanics including the cable management in a final profile in the area of the closing edge can be installed. This is at the same time the protection of the construction guaranteed. The securing of the closing edge can be done so that no force is required on the closing edge is.

In a further preferred embodiment sends the transmitter of the first light barrier in a light beam a first direction and the transmitter of the second light barrier a beam of light in a second direction. Preferably the light beam is substantially parallel to the closing edge, especially aligned horizontally. Further preferred are the light beam of the first light barrier and the light beam of the second photocell essentially in opposite directions oriented.

According to one another preferred embodiment a beam splitter is provided, the light beam in one of Number of light barriers corresponding number of partial light beams divides and each assigns a partial light beam of a light barrier. Such a beam splitter can, for example, by a prism be formed. In this way, only one light source, that means a transmitter, to supply several photoelectric barriers required.

at a further preferred embodiment At least one Strahlumlenkeinheit is provided which the light beam deflects. The Strahlumlenkeinheit is preferably between different Adjustable positions. As a deflection, for example, a used both translationally and rotatably movable mirror. The beam deflecting unit may be arranged to be closed adjustable between predetermined positions, the times preferably depending on the speed of the drive can be fixed.

In a further preferred embodiment, the door comprises a holder by means of which the transmitter or the receiver can be fastened movably in the region of the closing edge, wherein the holder has a four-bar chain. This allows a particularly smooth adjustment from the operating position to the rest position. In the operating position, the light barrier fulfills its intended function and recognizes objects or bodies in the travel path. In the rest position, the light barrier must be positioned so that the door can be completely closed. This requires a movable arrangement of the components of the light barrier. By means of the four-bar chain, a smooth construction is provided with which the light barrier can be easily and reliably brought from the operating position to the rest position. The holder is simple and very inexpensive to produce. Nevertheless, an exact guide possible. Due to the four-bar chain, the holder can be made very flat, so that it fits into very flat profiles, such as roller shutter profiles.

at a preferred embodiment is the four-bar chain in a closing edge forming or having Closing element accommodated. Compared to conventional Photocells results in the advantage that the adjustment mechanism to transfer the holder from the operating position to the rest position, none or at least exposed to less external environmental influences is and better from damage protected is. Due to the four-joint construction, the holder can be with Transmitter or receiver including a possible cable guide sink in the rest position in the closing element. This is also the sender or receiver low environmental impact exposed and also protected from collision or damage. At the same time, within of the termination element sensors, such as a reed contact, introduced for detecting the position of the holder or light barrier become. The priority is the angle of one or more elements the holder detected. Preferably, the closing element is through a closure profile formed with a cavity.

Conveniently, The four-link chain comprises a first link - first crank - and second link - second Crank -, with each link - crank - respectively has a first end and a second end. The first one in each case End is hinged and connected to the closing edge. For example both members on a surface having the closing edge, as in particular a closure profile, rotatably mounted. there the planes of rotation are preferably substantially parallel to each other. To the second end of the first link and to the second end of the first link second link is a third link - the coupling - articulated connected. In this way, a nearly vertical input and Extending the photocell allows. The transition from the rest position in the operating position is done by gravity the holder and / or by a spring.

Conveniently, is the at least one light barrier to the third member - the coupling - attached. The third term may be the sender, the receiver and / or both or one Wear reflector. But it can also be a rod to the third Limb - z. B. articulated - connect. Of the Rod then has the transmitter and / or the receiver or a reflector. Due to the four-bar chain construction, the rod remains in every position almost complete in a vertically aligned position. But also at immediate Use of the third link as a carrier for the respective light barrier element (transmitter / receiver / reflector) this moves essentially vertically. You can do that for entry / exit of the light barrier element provide a very small, narrow opening in the region of the closing edge, which can hardly be affected by contamination.

embodiments The invention will be further described below with reference to the drawings explained. Here are shown schematically:

1 a schematic view of a first embodiment of the gate according to the invention;

2 a section of a second embodiment of the gate according to the invention;

3 an enlarged section in the region of the first end of the closing edge of a third embodiment of the gate according to the invention with a schematic representation of the adjustment of the light barrier in a first position;

4 a section according to 3 with the photocell in a second position, and

5 a section according to 3 with the photocell in a third position, and

6 a graph for two movement parameters of the mounting location of a light barrier element of the light barrier of 3 to 5 ,

The 1 shows a goal 1 in the form of a high-speed door with two vertical side profiles 2 . 3 and a horizontal upper profile 4 that the two side profiles 2 . 3 as the upper conclusion of the door opening connects. A lower degree 5 of the gate 1 is formed by the soil.

To close or open the door opening is a door leaf 10 by means of a drive within a travel from an open position to a closed position movable. The lower edge is the door leaf 10 a closing edge 12 on, which includes a sealing profile. The Schließkan te has a first end 13 and a second end 14 on. To ensure reliable guidance and sealing of the door leaf 10 to ensure are the lateral edges 15 . 16 of the door leaf 10 in the page profiles 2 . 3 guided.

Below the closing edge 12 is at a distance A, a first photocell 20 and at a distance B, a second light beam 30 intended. To get this from the closing edge 12 Spaced arrangement to accomplish is in the area of the first end 13 the closing edge 12 a first arm 40 and in the region of the second end of the closing edge 12 a second arm 50 provided, each arm 40 . 50 from a working position (see solid lines in 1 and 2 ) in a rest position (see dashed lines in 1 and 2 ) and vice versa can be brought. For this purpose it is provided that the arms 40 . 50 on the inside of the door leaf 10 are displaceable over a guide in the vertical direction.

How out 1 further, the first arm points 40 a transmitter 22 and a receiver 33 on. The second arm 50 has a receiver 23 and a transmitter 32 on. The transmitter sends 22 a ray of light 21 towards the receiver 23 (in 1 from left to right) and the transmitter 32 sends a beam of light 31 towards the receiver 33 (in 1 from right to left). As in 1 shown, run the light beam 21 and the beam of light 31 essentially horizontally and in each case essentially parallel to the closing edge 12 , where the light beam 21 at a distance A from the closing edge 12 spaced and the light beam 31 at a distance B from the closing edge 12 spaced runs.

At the in 1 embodiment shown form the transmitter 22 and the receiver 23 the first photocell 20 , The transmitter 32 and the receiver 33 form the second photocell 30 , In a concrete embodiment of the in 1 In the embodiment shown, the distance A is less than 100 mm and the distance B is less than 50 mm. In a further embodiment form (not shown) with a plurality of light barriers can be provided that the distance between the closing edge 12 and the light beam generated by the nearest light barrier and the distances between the light beams formed by the other light barriers are less than 50 mm.

The 2 shows in a section of a schematic view of a second embodiment, in which only a transmitter 60 is provided on the door leaf 10 in the area of the first end 13 the closing edge 12 is appropriate. The transmitter 60 sends a beam of light 61 in a substantially vertical direction. As 2 further, the arm points 40 in the upper area a beam splitter 90 on. In the lower part of the arm 40 is a beam deflection unit 80 intended.

For training both the first photocell 20 as well as the second light barrier 30 will be the one from the sender 60 emitted light beam 61 after hitting the beam splitter 90 in a partial light beam 61A and a partial light beam 61B divided up. At the same time, the partial light beam 61A deflected so that it is at a distance B from the closing edge 12 runs in a horizontal direction. The one from the beam splitter 90 transmitted partial light beam 61B is through the Strahlumlenkeinheit 80 deflected so that the partial light beam 61B at a distance A from the closing edge 12 runs in a horizontal direction. Finally, the second arm points 50 a receiver 70 for receiving the partial light beam 61A as well as a receiver 71 for receiving the partial light beam 61B on.

The 3 to 5 show an enlarged section in the region of the first end 13 the closing edge 12 a third embodiment of a gate 130 with a schematic representation of the adjustment mechanism of a light barrier 150 , In 5 is the operating position of the light barrier 130 shown at a closing movement of the door leaf. 4 shows a middle position with already partially in a final element 100 Retracted photocell. In 3 the photocell is completely in the final element 100 retracted, ie the photocell is in the rest position.

The gate 130 is in this example a roller door with a top profile 102 as a final element 100 , The roller door can be formed from a series of hinged profiles. In another embodiment, the roller shutter on a curtain of flexible material. In both cases, the final profile forms 102 the lower closing edge. The final profile 102 is provided with an approximately 70mm high hollow chamber in which the light barrier 150 can be accommodated.

The light barrier has a holder 104 with a four-link chain mechanism 106 on. The term four-link chain is well known in the transmission theory. It represents a basic form of a flat gearbox. Here are two moving on a surface elements or cranks, here links 110 . 111 called hinged with one end movable. At the other end are the two bars or limbs 110 . 111 by another element or another rod - the coupling -, here third member 112 called, coupled together. In the illustrated example, such a four-bar linkage is used to provide a lightweight and cost-effective, space-saving mount for a photocell retractable ("dipping") in a door leaf 150 to accomplish.

The holder 104 the photocell is therefore in the closing edge 12 final element 100 retractable and retractable. This includes the four-link chain 106 a first crank or a first link 110 and a second crank or a second link 111 , The two limbs 110 . 111 are each in the range of one of their ends on a common ground, in our example, directly or indirectly to the end profile 102 , steered to. The first end of the first link 110 is here over a first joint 114 rotatable on the end profile 102 fixed. The first end of the second link 111 is about a second joint 115 rotatable on the end profile 102 established. The axes of rotation of the joints 114 . 115 as well as the other joints 116 . 117 , which are explained in more detail below, are substantially parallel. In our example, the axes of rotation are each perpendicular to the plane of the drawing.

The first link 110 is formed in the example as a straight rod. The second link 111 whose joint 115 deeper than the first joint 114 is arranged in the form of an angle with a first rod-shaped element 122 and a second rod-shaped element rigidly hinged thereto 123 educated. Through this angle form, which lies within the plane of rotation, the third member 112 in his in 3 shown extended position from the closing element 100 protrude.

The final profile 102 This graduation element 100 forms, points to this at the bottom 128 facing side an opening 124 on, through which the light barrier 150 partially extend and retract.

At the second end are the two limbs 110 . 111 hinged to the paddock or the third limb 112 hinged. The third link 112 is with the second end of the first link 110 over a third joint 116 hinged. The free end of the second rod-shaped element 123 the angular second member 111 is at a middle area of the third limb 112 by means of a fourth joint 117 hinged.

At the free end of the third link 112 is then a light barrier element, namely in this example, the transmitter 22 attached. At the other end of the final profile 102 is the mirror image arrangement, in which case at the free end of the third member 112 the recipient 23 is attached.

In a further embodiment, not shown, is on the third member 112 , approximately in the area of the fourth joint 117 instead of a rigid extension of the third link 112 a rod hinged articulated at the free end then the light barrier element 22 respectively. 23 is attached. This rod can always be held in a vertical position by gravity. However, the embodiment with a rigid third member is preferred 112 , As a result, a more accurate arrangement of the respective light barrier element is ensured in the operating position.

To a predetermined torsional stiffness of the interconnected links 110 . 111 . 112 or in the area of storage of the first or second member 110 . 111 To effect, provided with appropriate stiffness torsion springs can be used.

With this embodiment of the four-bar chain 106 will allow that the transmitter 22 carrying rod 112 . 119 in the in the 3 to 5 shown positions is oriented almost vertically and so through the opening 124 in the bottom of the end element 100 , the closing edge 12 forms into the cavity 101 of the graduation profile 102 retractable and out of the cavity 101 is extendable. In the embodiment shown, the height of the cavity is 101 about 70 mm. The limbs 110 . 111 and the third link 112 may be formed, for example, of stainless steel.

In the area of the second end 14 (please refer 1 ) is the same construction in a mirror-inverted arrangement, wherein the rod 119 a receiver 23 wearing.

The in the 3 to 5 embodiment shown allows a smooth entry and exit of the light barrier 150 , The transition from the rest position to the operating position is effected by the gravity of the holder and / or by a spring. As a result of the four-bar chain construction, the intermediate module remains almost completely in a vertically aligned position during its position change or the movement of the door leaf. The photocell is protected in the rest position from external environmental influences and from damage. However, to form a leading light barrier curtain may be at the extension 119 of the third member 112 the same arrangement of light barrier elements as on the arms 40 and 50 of the 1 and 2 to be available.

Further, (not shown) - for example elastic - locking elements may be present to the holder or individual elements thereof in its functional position ( 3 - Extended state) to lock.

• – Die x-Komponente auf der Skala rechts;
• – Die y-Komponente auf der Skala links;
• – Sowie die Verdrehung des dritten Glieds 112 in Winkelgrad.

The movement of the holder 104 results from the in 6 represented graphs. The graph represents two motion parameters of the attachment point of the light barrier element at the end of the third link 112 and a movement parameter of the third limb 112 forming staff, namely:

• - The x-component on the scale on the right;
• - The y component on the left scale;
• - As well as the twisting of the third link 112 in angular degrees.

From the graph it can be seen that the attachment point of the light barrier element during the entire lifting and lowering movement at a vertical stroke of 60 mm only changes by about 0.02 mm. During the entire movement, only one twist of the rod results by less than 5 angles. So you have almost a sliding movement as in a displacement guide, but this with the ease of rotation joints in an extremely flat structure.

1

gate

2

side profile

3

side profile

4

upper profile

5

graduation

10

door leaf

12

closing edge

13

first The End

14

second The End

15

margin

16

margin

20

first photocell

21

beam of light

22

transmitter

23

receiver

30

second photocell

31

beam of light

32

transmitter

33

receiver

40

poor

50

poor

60

transmitter

61

beam of light

61A

Partial light beam

61B

Partial light beam

70

receiver

71

receiver

80

beam deflecting

90

beam splitter

100

termination element

101

cavity

102

End profile

104

bracket

106

Four-bar chain

110

first element

111

second element

112

third element

114

first joint

115

second joint

116

third joint

117

fourth joint

119

renewal of the third member

122

first rod-shaped subelement

123

second rod-shaped subelement

124

opening

128

ground

130

gate (Rolling gate)

A

distance

B

distance

C

Area

Claims (28)

Gate ( 1 ), in particular a high-speed door, with a door leaf ( 10 ), which has a closing edge ( 12 ) and which is movable by means of a drive within a travel path, and with a first light barrier ( 20 ) arranged at a distance (A) from the closing edge ( 12 ) is designed to detect objects or body parts present in the travel path, characterized by at least one second light barrier ( 30 ) arranged to be arranged at a predetermined distance (B) from the closing edge ( 12 ) in a region (C) between the first light barrier ( 20 ) and the closing edge ( 12 ) is trained. Door according to claim 1, characterized in that the distance (B) between the second light barrier ( 30 ) and the closing edge ( 12 ) is smaller than 50 mm. Door according to one of claims 1 or 2, characterized in that the distance (A) between the first light barrier ( 20 ) and the closing edge ( 12 ) and / or the distance (B) between the second light barrier ( 30 ) and the closing edge ( 12 ) are changeable. Gate according to one of claims 1 to 3, characterized in that at least one light barrier ( 20 . 30 ) with the door leaf ( 10 ) is arranged mitbewegend. Door according to one of claims 1 to 4, characterized in that at least one light barrier ( 20 . 30 ) relative to the door leaf ( 10 ) is movable. Gate according to one of claims 1 to 5, characterized in that at least one light barrier ( 20 . 30 ) by the drive for the door leaf ( 10 ) is movable. Door according to one of claims 1 to 6, characterized in that the first light barrier ( 20 ) and / or the second light barrier ( 30 ) at least one light beam ( 21 . 31 ) transmitting transmitter ( 22 . 32 ) and at least one of the light beam ( 21 . 31 ) receiving recipients ( 23 . 32 ). Gate according to one of claims 1 to 7, characterized in that the closing edge ( 12 ) a first end ( 13 ) and a second end ( 14 ), wherein the transmitter ( 22 . 32 ) in the region of the first end ( 13 ) and the recipient ( 23 . 33 ) in the region of the second end ( 14 ) are mounted. Gate according to one of claims 1 to 7, characterized in that the closing edge ( 12 ) a first end ( 13 ) and a second end ( 14 ), wherein the transmitter ( 22 . 32 ) and the recipient ( 23 . 33 ) in the region of the first end ( 13 ) and a reflector in the region of the second end ( 14 ) is attached. Gate according to one of claims 1 to 9, characterized in that in the region of a first end ( 13 ) of the closing edge ( 12 ) an arm ( 40 ) and / or in the region of a second end ( 14 ) of the closing edge ( 12 ) an arm ( 50 ) on the door leaf ( 10 ), the arm ( 40 . 50 ) at least one transmitter ( 22 . 32 ) and / or at least one receiver ( 23 . 33 ) wearing. Gate according to claim 10, characterized in that the arm ( 40 . 50 ) in one of the closing edge ( 12 ) in the closed position facing completion ( 5 ) through the gate ( 1 ) is retractable to be closed door opening. Door according to one of claims 10 or 11, characterized in that the arm ( 40 . 50 ) from an operating position to a rest position relative to the closing edge ( 12 ) is movable. Gate according to one of claims 10 to 12, characterized in that the arm ( 40 . 50 ) about a parallel or perpendicular to the closing edge ( 12 ) aligned axis of the operating position in the rest position is pivotable. Gate according to one of claims 10 to 13, characterized in that the arm ( 40 . 50 ) has a plurality of partial arms and / or multiple joints. Gate according to claim 14, characterized in that the sub-arms are telescopically slidable. Gate according to one of claims 10 to 15, characterized in that the arm ( 40 . 50 ) Can be brought by a spring from the operating position to the rest position or vice versa. Gate according to one of claims 1 to 16, characterized in that the transmitter ( 22 ) of the first light barrier ( 20 ) a light beam ( 21 ) in a first direction and the transmitter ( 32 ) of the second light barrier ( 30 ) a light beam ( 31 ) in a second direction. Door according to one of claims 1 to 17, characterized in that the light beam ( 21 . 31 ) substantially parallel to the closing edge ( 12 ), preferably horizontally aligned. Gate according to one of claims 1 to 18, characterized in that a beam splitter ( 90 ) is provided, the light beam ( 61 ) in a number of light barriers corresponding number of partial light beams ( 61A . 61B ) and which in each case has a partial light beam ( 61A . 61B ) of a light barrier ( 20 . 30 ). Door according to one of claims 1 to 19, characterized in that at least one Strahlumlenkeinheit ( 80 ) is provided which the light beam ( 21 . 31 . 61 ) redirects. Gate according to claim 20, characterized in that the beam deflection unit ( 80 ) is adjustable between different positions. Door according to one of claims 20 or 21, characterized in that the beam deflection unit ( 80 ) is adjustable at predetermined times between the positions, wherein the times are preferably determined as a function of the speed of the drive. Door according to one of the preceding claims, characterized by a holder by means of the transmitter ( 22 ) and / or the recipient ( 23 ) movable in the region of the closing edge ( 12 ), wherein the holder has a four-bar chain. Door according to claim 23, characterized in that the four-bar chain in one the closing edge ( 12 ) forming or having a final element ( 100 ) is accommodated. Gate according to claim 24, characterized in that the closing element ( 100 ) a cavity ( 101 ) ( 102 ). Gate according to one of claims 23 to 25, characterized in that the four-bar linkage comprises a first link ( 110 ) and a second member ( 111 ), each link ( 110 . 111 ) is articulated at one end and with the closing edge ( 12 ) and that the four-link chain further comprises a third link ( 112 ), by means of which the first member ( 110 ) and second member ( 112 ) are hinged together. Gate according to claim 26, characterized in that on the third member ( 112 ) the transmitter ( 22 ), the recipient ( 23 ) and / or a reflector is attached. Door according to one of the preceding claims 26 or 27, characterized in that the first member ( 110 ) and / or the second member ( 111 ) is angular, in particular L-shaped, is formed.