SECTIONAL DOOR WITH LIGHT GRID SAFETY DEVICE

Abstract

Sectional door with an automatically driven door leaf (16) guided in a first and a second guide rail (12) and with at least one light grid device (22) for forming a transmitter and / or a receiver of a light grid safety device (20), wherein the light grid device (22) is designed to emit and / or receive a series of light beams along a door path defined by the guide rails (12), wherein the light grid device (22) comprises a profile housing (24) for receiving an elongated light grid element (26) which is designed to emit or receive the series of light beams, wherein the profile housing (24) bears against the guide rail (12) with a contact area (48) formed on its longitudinal side, wherein either the contact area (48) has a projection (60) which positively engages behind the guide rail (12), or wherein the light grid device (22) further comprises at least one spacer (68) for separating the running rail (12) from the profile housing (24), wherein at least one profile housing (24) of the light grid device (22) is arranged indirectly by means of spacer holders (68) inserted between the profile housing (24) of the light grid device (22) and at least one running rail (12) in a force-fitting or form-fitting manner on at least one of the running rails (12), wherein at least one first holder (28) of the light grid device (22) is inserted on the side region of the profile housing (24) facing away from the running rail (12) in a holder receiving region (36) of the profile housing (24) and is fastened to pre-fastened fastening openings in the interior of a frame (14) of the (10).

Description

[0001] The invention relates to a sectional door with a light grid device for forming a light grid which is intended to secure the sectional door.

[0002] Automatically driven doors come in many designs and configurations. One type of door for which the invention is particularly designed and suitable is the sectional door, which has a door leaf formed by several hinged door slats that are guided in lateral tracks attached to a frame. However, the light curtain system described here is also interesting for other overhead doors such as roller doors, high-speed doors, or lifting doors.

[0003] It is common practice to secure automatically driven gates using optical safety elements such as light barriers. The purpose of light barriers is to detect obstacles entering the path of a closing gate, then stop the closing process and retract the gate leaf slightly. Individual light barriers are installed in the gate path close to the ground. However, there are also movable obstacles that first enter the gate path slightly above the ground. One example is a forklift truck with a slightly raised load. With a raised load, a single light barrier installed on the ground would not initially be interrupted, even though the gate path is already blocked. Therefore, it is common practice, particularly in the field of industrial gates, to secure automatically driven gates with light curtains. Light curtain systems for securing gates are already available on the market.Another example of a previously known light grid safety device is the company brochure "Vario B - Switching Light Curtain for Object Detection" from Leuze Elektronik, distributed online and elsewhere, and downloaded on August 4, 2012. For further technical details of such light grids, please refer to this brochure. Light grids can be imagined as a type of light barrier arranged in a series along a safety plane. The multiple transmitters and receivers are usually housed together on a circuit board with a correspondingly elongated design.

[0004] A light grid is known from DE 202 11 946 U1. The light grid comprises a hollow profile made of transparent material with a light emitting strip and / or a light receiving strip. The hollow profile is attached with its back side flush with the frame of a door. Compression springs provided in the hollow profile compensate for the different expansion of the hollow profile and the light strips.

[0005] US 2004 / 0075046 A1 discloses a passive obstacle detection system. The detection system comprises passive IR detectors arranged outside the plane of the door leaf in a housing. The housing is cuboid-shaped.

[0006] The invention aims to improve doors equipped with light grid safety devices, particularly with regard to reliable detection of obstacles close to the doorway, and to simplify manufacture and / or installation. Furthermore, the invention aims to create a door, particularly a sectional door, that is better and more simply protected with a light grid.

[0007] The problem is solved by the subject matter of claim 1.

[0008] Advantageous embodiments of the invention are the subject of the subclaims.

[0009] The invention provides a sectional door with an automatically driven door leaf guided in a first and a second guide rail, and with at least one light grid device for forming a transmitter and / or a receiver of a light grid safety device. The light grid device is designed to emit and / or receive a series of light beams along a door path defined by the guide rails. The light grid device comprises a profile housing for accommodating an elongated light grid element designed to emit or receive the series of light beams. The profile housing bears against the guide rail with a contact area formed on its longitudinal side.

[0010] According to another aspect, the invention provides a light grid device for forming a transmitter and / or a receiver of a light grid safety device for an automatically driven gate, comprising a profile housing for receiving an elongated light grid element, in particular a light grid transmitter element and / or light grid receiver element, and at least one holder having a profile fastening region and a gate fastening region, wherein the profile housing has an elongated holder receiving region for the positively locking anchoring of the profile fastening region of the holder in a displaceable manner along the longitudinal direction of the profile.

[0011] It is preferred that the profile fastening region extends in a first direction in order to be supported at at least two points spaced apart in the longitudinal direction of the profile or at at least one line extending in the longitudinal direction of the profile in or on the holder receiving region, and / or that the gate fastening region extends in a second direction in order to compensate for different transverse distances to predetermined fastening points on the gate.

[0012] It is preferred that the holder is a bracket, wherein the profile fastening area is arranged on a first leg and the gate fastening area is arranged on a second leg.

[0013] It is preferred that the profile fastening area has a first screw receiving opening and a second screw receiving opening arranged at a distance therefrom in the longitudinal direction of the profile for receiving fastening screws.

[0014] It is preferred that the door fastening device has an elongated hole which extends with a directional component transverse to the profile longitudinal direction of the profile housing.

[0015] It is preferred that the profile housing has a contact area for contacting a guide rail of the gate to be secured.

[0016] It is preferred that the contact area has a projection for positively engaging, in particular engaging behind, the guide rail.

[0017] It is preferred that the profile of the profile housing has a C-shaped main channel for receiving the light grid transmitter and / or receiver element, which C-shaped main channel has a light grid gap for the light beams of the light grid.

[0018] It is preferred that the profile of the profile housing has at least one C-shaped or U-shaped side channel which forms the holder receiving area.

[0019] It is preferred that the C-profile or U-profile of the side channel has a fastening gap through which the holder or a fastening element for the holder can pass, wherein the fastening gap is a) on a side area extending substantially transversely to a front side having a light grid gap or b) located to the side of the light grid gap on the front.

[0020] It is preferred that the profile housing is designed symmetrically relative to a central longitudinal plane running centrally to a light grid gap.

[0021] It is preferred that the light grid device comprises at least one spacer for spacing the running rail of the gate from the profile housing.

[0022] It is preferred that the spacer has a first pair of contact areas with a first distance, wherein the first pair of contact areas can be connected to the profile housing and to the guide rail.

[0023] It is preferred that the spacer has a second pair of contact areas with a second distance, wherein the second pair of contact areas can be connected to the profile housing and to the guide rail.

[0024] It is preferred that the first distance is greater than the second distance in order to make the guide rail and the profile housing spaced apart according to the arrangement of the spacer.

[0025] According to a further aspect, the invention provides a light grid safety device for securing an automatically driven door, comprising a first light grid device according to one of the preceding aspects of the invention for fastening to one side of the door and a second light grid device according to one of the preceding aspects of the invention for fastening to the other side of the door.

[0026] According to a further aspect, the invention provides an automatically driven gate with an automatically driven gate leaf guided in a first and a second guide rail and a light grid device according to one of the preceding aspects of the invention and / or a light grid safety device of the type described above, wherein at least one profile housing of the light grid device is arranged in abutting relationship with at least one of the guide rails in a force-fitting or form-fitting manner, on this side preferably held solely by the force-fitting or form-fitting manner without additional fastening elements, wherein at least one first holder of the light grid device, preferably at least one first and one spaced-apart second holder, engages in the holder receptacle on the side region of the profile housing facing away from the guide rail and is fastened to prefabricated fastening openings in a frame of the gate.

[0027] Alternatively, it is preferred that at least one profile housing of the light grid device is arranged indirectly by means of spacers inserted between the profile housing of the light grid device and at least one guide rail in a force-fitting or form-fitting manner on at least one of the guide rails, preferably held on this side solely by the force-fitting or form-fitting connection without additional fastening elements, wherein at least one first holder of the light grid device, preferably at least one first and one spaced-apart second holder, engages in the holder receptacle on the side region of the profile housing facing away from the guide rail and is fastened to prefabricated fastening openings in a frame of the door.

[0028] It is preferred that the at least one guide rail captured by the profile housing extends obliquely, wherein the light plane running through the center of the light grid gap extends on the center plane of the part of the gate leaf guided in the guide rail.

[0029] Preferably, a light curtain system for use on sectional doors is proposed. Preferably, at least one, some, or all of the following features or advantages are provided: - the light grid profile is aligned to the center of the door slat guided in the guide rail by leaning against the door track; - the light grid profile is continuously adjustable along the guide rail and axially secured, e.g. by screw connections in the area between the holder and the profile housing; - a projection, e.g. a nose / web on the light grid profile, prevents the light grid profile from tilting; - space-saving installation in the door frame: when the door is closed, the light grid is protected from possible damage (vandalism, etc.); - quick and safe assembly; - by connecting the light grid profile to the holder on the side (e.g. mounting bracket), the smallest possible height of the light grid is achieved; and / or - The hole group on the frame is used to fasten the light grid profile.

[0030] In one variant of the possible fastening of the light guide profile, the fastening bracket is fastened to the light guide profile, e.g. from the front, using a thread-forming screw.

[0031] Advantages of this variant can be: it enables mechanical fastening (e.g. with a cordless screwdriver) of the mounting bracket to the light guide profile during subsequent assembly or adjustment.

[0032] The housing profile can be a metal profile. For example, the housing profile is a light metal profile, such as aluminum. In another design, the profile housing is extruded from a plastic housing profile.

[0033] The desired length of the light grid device in the longitudinal direction of the profile can be adjusted to the door height to be protected by cutting a section of the profile to length. The housing profile preferably accommodates an elongated light grid circuit board, e.g., 1.8 to 3 m, preferably approximately 2.5 m long. The circuit board can be a transmitter board or a receiver board. It is also possible to combine the transmitter and receiver on one board or in a profile housing and to provide a reflection device for the light beams on the opposite side of the door.

[0034] One advantage of the combination of a bracket on one side and a connection to the guide rail on the other is that simply fitting fastening elements to the brackets on one side is sufficient, and the light curtain is correctly aligned straight away. For example, on one side, fastening can be provided via the bracket using screws, preferably to pre-made openings in the frame, while on the other side a frictional connection, but preferably a positive connection, such as a recess behind the guide rail, is provided. For example, the profile of the housing has a projection, such as a nose, on a rear and lower corner that engages under the guide rail.

[0035] Preferably, a plurality of brackets are provided at a distance from one another on the bracket mounting receptacle. A multiple mounting could, for example, comprise three or more brackets, e.g., one bracket at the bottom, one or more in the middle, and one at the top.

[0036] In particular, if the profile housing is clamped to the track by force or form fit and / or axially secured, e.g., using clamping screws or other fastening screws or screw fasteners between the bracket and the profile housing, there is no need for floor support. The profile housing can be suspended. Particularly when attached to the track, secure alignment can still be achieved. If the profile housing is attached to, for example, the pre-assembled track of the industrially manufactured door, the light curtain is immediately correctly positioned relative to the door path defined by the track. Simple and correct installation is further supported by the use of industrially prefabricated rows of holes on the door frame for attaching the bracket.

[0037] In a particularly preferred embodiment, hexagon screws are used as clamping screws between the holder receptacle and the holder. The hexagon head can be inserted into the holder receptacle, which is designed as a C-profile on the side of the profile housing. With appropriate selection of the relative dimensions between the screw head and the C-profile, the screw heads can be moved within the C-profile, but cannot be rotated around the screw axis. Thus, the clamping screw sits with its head in the C-profile and is continuously adjustable and secured against rotation.

[0038] The door fastening area of ​​the bracket, which is preferably designed as an angle, is preferably an elongated hole. The frame of Hörmann KG sectional doors currently on the market has several prefabricated fastening holes, which are provided, for example, in pairs in a row. For further details, particularly regarding the design of the sectional doors and the possible routing of the track rails, please refer to the enclosed company brochures "Installation Data for Industrial Sectional Doors, as of July 1, 2012," the "Industrial Sectional Doors" brochure, print 06, 2011, and "Installation Data for Industrial Sectional Door DPU," as of July 1, 2012, from Hörmann KG, all available online on August 6, 2012.

[0039] The track rails of these sectional doors are angled, at least in some construction variants. The bracket is preferably adapted to the angled track path with a slotted hole that runs diagonally toward the profile mounting area. Due to the angled path, the slotted hole always overlaps at least one of the pre-drilled holes, allowing the bracket to be screwed into place.

[0040] Preferably, the profile housing and / or the holder are designed symmetrically so that each light barrier device can be used on both the left and right sides of the gate. For example, if a light barrier safety device is provided with a light grid transmitter in a first profile housing and a light grid receiver in a second profile housing, then, depending on the sunlight conditions or other environmental conditions, the light transmitter can be mounted on the right side of the gate and the light grid receiver on the left side, or vice versa.

[0041] The preferred procedure for manufacturing each light grid element is to prepare the profile housing, then insert the circuit board (even in sizes of around 2.5m in length) from a small open side, and then fill the remaining cavities with a suitable curable material, e.g. casting resin, to protect and fix the circuit board.

[0042] Embodiments of the invention are explained in more detail below with reference to the accompanying drawings, in which: Fig. 1 a horizontal section through a lateral section of an automatically driven door using the example of a sectional door with light grid safety device; Fig. 2 an enlarged detail of the representation of Fig. 1 to explain the installation of a profile housing of a light grid device of the light grid safety device on a guide rail of the door; Fig. 3 a side view from the center of the door opening of the door frame with track and light grid device at the bottom of the door, close to the floor; Fig. 4 a perspective view of the lower side corner area of ​​the gate, which in Fig. 1 is shown in horizontal section; Fig. 5 a perspective schematic representation of a first embodiment of the light grid device; Fig. 6 a further perspective view of the first embodiment of the light grid device; Fig. 7 a perspective schematic representation of a second embodiment of the light grid device; Fig. 8 shows a further perspective view of the second embodiment of the light grid device; Fig. 9 a perspective schematic representation of a third embodiment of the light grid device; Fig. 10 is a further perspective view of the third embodiment of the light grid device; Fig. 11 is a schematic perspective view of a fourth embodiment of the light grid device; Fig. 12 a perspective partial view of the door frame with track and light grid device; Fig. 13 a side view from the center of the door opening of the door frame with track and light grid device at the bottom of the door, close to the floor; Fig. 14 is a perspective schematic representation of a fifth embodiment of the light grid device; Fig. 15 is a further perspective schematic view of the fifth embodiment of the light grid device; Fig. 16 a perspective schematic representation of a variant of the fifth embodiment of the light grid device.

[0043] In the Fig. 1 to Fig. 4 shows an automatically driven door 10, here for example a sectional door, with a door leaf 16 guided in guide rails 12 on a frame 14 and automatically driven by a door drive (not shown), in particular constructed from door slats 18. The figures only show one lateral area of ​​the door 10, for example a lower right area. The opposite other lateral area of ​​the door 10 is correspondingly mirror-image, so that it does not need to be shown. For further details regarding the possible general construction of the sectional door, the possible paths and the possible construction of the guide rails 12 as well as the design of the frames, reference is made to the attached documents "Installation Data Industrial Sectional Doors, as of July 1, 2012", brochure "Industrial Sectional Doors", print 06, 2011 and "Installation Data Industrial Sectional Door DPU", as of July 1, 2012 from Hörmann KG.It also explains and shows a possible door drive in more detail.

[0044] Unlike known sectional doors, the door 10 shown in the accompanying drawings is equipped with a light grid safety device 20, which comprises light grid devices 22 on the side areas of the door 10, mounted inside the frame 14. One of the light grid devices 22 forms a light grid transmitter, the other a light grid receiver. The light grid transmitter emits a dense row of light beams along the extension of the light grid device 22, which are received by the light grid receiver. If at least one light beam is interrupted by an obstacle in the door path during a closing movement of the door 10, a shutdown and reversing signal is sent to the door drive to stop the closing movement and, if necessary, to retract a short distance. In this respect, the light grid safety device 20 acts like a dense row of light barriers arranged one after the other in the direction of the door height.Naturally, this series of light barriers is controlled and evaluated depending on the path of the gate leaf 16, so that a normal interruption caused by the closing gate leaf 16 is not considered an obstruction. For this purpose, the light curtain safety device 20 has a light curtain control and evaluation unit (not shown in detail) connected to the control unit of the gate drive. This can be configured as part of the circuit board of at least one light curtain device 22 or as a separate computer unit connected to the gate drive control unit and the circuit boards of the light curtain transmitter and the light curtain receiver.

[0045] Each light grid device 22 has a profile housing 24, a light grid element 26 accommodated therein and a plurality of holders 28, of which only one holder 28 is shown in the figures.

[0046] The light grid element 26 is, for example, a light grid transmitter element with an elongated transmitter board 30 on which a series of light diodes are arranged for emitting the light beams, or a light grid receiver element with an elongated receiver board 32 for receiving the individual light beams in a separately resolved manner.

[0047] The profile housing 24 has a C-shaped profiled main channel 34, in which the light grid element 26 is inserted and cast with filling compound, and a holder receiving area 36, ​​in which the holder 28 is slidably inserted and anchored by fastening screws or screw fasteners 40, in particular clamping screws.

[0048] The C-shaped main channel 34 has a light grid gap 42 through which the light beams are transmitted or received. Fig. In Figure 1, the center plane 44 running through the center of this light grid gap 42 is represented by the profile housing 24. The light rays are transmitted and received along this center plane 44; thus, this center plane 44 indicates the light grid generated by the light rays.

[0049] The profile housing 24 is formed symmetrically to this center plane 44, so that a holder receiving area 36 is formed on each side. The holder receiving area has a C-shaped side channel 46 for receiving the heads of the clamping screws 40 or for receiving an engagement area of ​​the holder 28.

[0050] Each narrow longitudinal side of the profile housing 24 is also designed as a contact area 48, which can nestle against the guide rail 12 essentially along the entire length of the profile housing.

[0051] The profile housing 24 is thus arranged with one narrow long side adjacent to the guide rail 12 and is fastened on the other narrow long side with the holder to prefabricated openings within the frame 14.

[0052] The holder 28 is designed as a bracket with a first leg 50 and a second leg 52. The first leg 50 has a profile fastening area 54 for anchoring the holder 28 to the holder receiving area 36 of the profile housing 24. The second leg 52 has a door fastening area 56 for fastening the holder 28 to openings in the frame 14. The door fastening area 56 preferably has an elongated hole 58.

[0053] Due to the anchoring option that can be moved along the profile length of the profile housing 24 and the elongated hole 58, the door fastening area 56 can be adapted to an inclined course of the guide rails 12.

[0054] Due to the profile housing's attachment to the track rail, the light plane, represented by the center plane 44, always adapts to the path of the door. Across the entire distance to be secured, the center plane 44 is preferably arranged such that this center plane extends through the center plane of the door slats 18 of the door leaf 16, which are guided along the track rail 12. Thus, with just one light plane, the entry of an object from both sides of the door is monitored with equal security.

[0055] In the following, different embodiments of the light grid device 22 are described with reference to the illustrations of the Fig. 5 to Fig. 11 is explained in more detail.

[0056] In the Fig. 5 and Fig. In the first embodiment shown in Figure 6, the profile housing 24 has a projection 60, e.g. in the form of a nose, at the corner edges between the base (opposite the light grid gap) and the narrow longitudinal sides. With this projection 60, the profile housing 24 engages, as shown in Fig. 2, fits positively behind the guide rail 12.

[0057] In the first embodiment, the first leg 50 of the holder 28 has bores spaced apart from one another in the longitudinal direction of the profile, through which the clamping screws 40 engage. Their hexagonal heads engage slidably but non-rotatably in the C-shaped side channel 46 and are clamped there by tightening nuts. In this way, with the clamping screws 40 loosened, the holder 28 can be moved along the profile housing 24 until a suitable prefabricated opening in the frame 14 is reached, and the position is adjusted accordingly.

[0058] For this purpose, a fastening gap 64 of the side channel 46 opens on the side of the profile housing 24. The longitudinal center plane through the fastening gap 64 thus runs essentially transversely to the center plane 44. This fastening gap 64 is penetrated by the shafts of the clamping screws.

[0059] By clamping the clamping screws 40, the profile housing 24 is axially secured; ie, the profile housing 24 is also secured against displacement in the longitudinal direction of the profile by the holder 28 attached to the gate.

[0060] The profile housing 24 therefore does not have to rest on the floor; in Fig. 3 this is indicated by the clear distance between profile housing 24 and floor.

[0061] The Fig. 7 and Fig. The second embodiment shown in Figure 8 differs from the first embodiment by omitting the projection 60, so that the contact with the guide rail occurs essentially by frictional engagement. Otherwise, the design is identical to the first embodiment, so reference can be made to the above explanations.

[0062] In the Fig. 9 and Fig. In the embodiment shown in Figure 10, the bracket is made, for example, of plastic, such that an engagement region 66 is formed on the first leg, which engages behind the C-shaped side channel 46 of the profile housing 24. This represents a variant without axial locking; however, this variant could also be modified to provide axial locking, for example, by a small screw screwed into the T-slot.

[0063] At the Fig. In the embodiment shown in Figure 11, the fastening gap 64 of the holder receiving area 36 opens not on the narrow longitudinal side of the profile housing 24, but rather on the front, parallel to the light grid gap 42. This allows the screw fasteners 40, here designed, for example, as self-tapping screws, to be handled from the front, resulting in easier assembly. In this embodiment, the side channel 46 is U-shaped rather than C-shaped; the positive locking is achieved in particular by the threaded engagement of the screw fasteners 40.

[0064] In a variant of this embodiment, thread flanks (like those of a nut) are provided, which are extruded onto the side surfaces of the side channel 46, which is U-shaped here, for example, and in the process provide a height offset with half the thread pitch.

[0065] If the door slats 18 have a very large thickness, it is necessary to arrange the light grid device 22 at a distance from the guide rail 12 so that the light rays run in the central plane 44. The Fig. 12 to Fig. The embodiment shown in Figure 16 additionally has a plurality of spacers 68 for spacing the guide rail 12 from the profile housing 24, of which only one spacer 68 is shown in the figures. The spacers 68 are made, for example, of plastic ( Fig. 12 to Fig. 15) or metal ( Fig. 16). Each spacer has a first pair of opposing contact areas 70 and a second pair of opposing contact areas 74. Each pair of contact areas 70, 74 is designed such that it can be connected to the profile housing 24 and to the guide rail 12. Two contact surfaces of the first pair of contact areas 70 are at a distance X from one another and two contact surfaces of the second pair of contact areas 74 are at a distance Y from one another. The distance X is smaller than the distance Y. The distance X has a length between 8 mm and 18 mm, in particular 13.5 mm. The distance Y has a length between 25 mm and 35 mm, in particular 30 mm. As a result, the guide rail 12 can be spaced apart from the profile housing 24 according to the arrangement of the spacer 68, depending on whether the spacer 68 is arranged with the direction of the distance X or with the direction of the distance Y parallel to the direction of the guide rail 12.

[0066] The spacer 68 is, as shown in the Fig. 12 and Fig. 13, inserted between the guide rail 12 and the profile housing 24, and the holder 28 is provided in the profile fastening area 54 opposite the spacer 68. The spacer is fastened to the profile housing 24 in the door fastening area 54. One contact surface of the spacer 68 faces the door fastening area 54, while another contact surface of the spacer 68 faces the guide rail 12. The spacer 68 is arranged such that it is non-positively or positively connected to the guide rail 12 and is preferably held without additional fastening elements. Due to the spacers 68 being non-positively or positively connected to the guide rail 12 and fastened to the door fastening area 54, the profile housing 24 is arranged indirectly in non-positively or positively adjacent contact with the guide rail 12. In this case, the profile housing 24 has a distance X from the guide rail 12. If the spacer 68, as in Fig. 15, by 90° compared to the Fig. 12 to Fig. 14 and Fig. 16 shown cases, the profile housing 24 has a distance Y from the guide rail 12.

[0067] In the Fig. 1 to Fig. In the sectional door shown in Figure 4, the guide rail 12 runs at an angle. Due to the profile housing 24, the light grid also runs at a corresponding angle, ensuring that the center of the door leaf 16 is always monitored. Thus, the light grid's position is always adjusted to the door's position by being aligned with the guide rail 12. This ensures that the light grid is always correctly aligned, even with different guide rail positions, as mentioned in the Hörmann KG company brochures mentioned above. This design is suitable, for example, for 40 mm wide door slats 18.

[0068] For example, if the door slats 18 are 67 mm wide, the spacer 68 is preferably as shown in the Fig. 12 to Fig. 14 and Fig. 16 and the length of the distance X is 13.5 mm. If the width of the door slats 18 100 mm, the spacer 68 is preferably as shown in Fig. 15, and the length of the distance Y is 30 mm. The profile housing 24 is indirectly arranged adjacent to the guide rail 12 by the spacers 68 inserted between the profile housing 24 and the inclined guide rail 12. The spacers 68 are preferably screwed to the profile housing 24. The light grid then runs at the same angle as described above, and the center of the wider gate leaf 16 is monitored. List of reference symbols 10 goals 12 guide rail 14 frame 16 gate leaves 18 door slats 20 Light grid safety device 22 Light grid device 24 profile housings 26 light grid element 28 holders 30 transmitter board 32 Receiver board 34 Main Canal 36 Holder mounting area 40 screw fasteners (e.g. clamping screws or self-tapping screws) 42 light grid gap 44 Middle Level 46 Side channel (e.g. C-shaped or U-shaped) 48 Investment area 50 first leg 52 second leg 54 Profile fastening area 56 Gate fastening area 58 slot 60 lead 64 Mounting gap 66 Intervention area 68 spacers 70 first pair of contact areas 74 second pair of contact areas X first distance Y second distance

Claims

[1] Sectional door with an automatically driven door leaf (16) guided in a first and a second guide rail (12) and with at least one light grid device (22) for forming a transmitter and / or a receiver of a light grid safety device (20), wherein the light grid device (22) is designed to emit and / or receive a series of light beams along a door path defined by the guide rails (12), wherein the light grid device (22) comprises a profile housing (24) for receiving an elongated light grid element (26) which is designed to emit or receive the series of light beams, wherein the profile housing (24) bears against the guide rail (12) with a contact area (48) formed on its longitudinal side, wherein either the contact area (48) has a projection (60) which engages behind the guide rail (12) in a form-fitting manner, or wherein the light grid device (22) further comprises at least one spacer (68) for separating the running rail (12) from the profile housing (24), wherein at least one profile housing (24) of the light grid device (22) is arranged indirectly by means of spacer holders (68) inserted between the profile housing (24) of the light grid device (22) and at least one running rail (12) in a force-fitting or form-fitting manner on at least one of the running rails (12), wherein at least one first holder (28) of the light grid device (22) is inserted on the side region of the profile housing (24) facing away from the running rail (12) in a holder receiving region (36) of the profile housing (24) and is fastened to pre-fastened fastening openings in the interior of a frame (14) of the (10). [2] Sectional door according to claim 1, characterized byin that the light grid device (22) comprises a holder (28) which has a profile fastening region (54) and a gate fastening region (56), wherein the profile housing (24) has an elongate holder receiving region (36) for anchoring the profile fastening region (54) of the holder (28) displaceably along the profile longitudinal direction. [3] Sectional door according to claim 2, characterized by , that the profile fastening region (54) extends in a first direction in order to be supported at at least two points spaced apart in the profile longitudinal direction or at at least one line extending in the profile longitudinal direction in or on the holder receiving region (36), and / or that the gate fastening area (56) extends in a second direction in order to compensate for different transverse distances to predetermined fastening points on the gate (10). [4] Sectional door according to claim 2 or 3, characterized bythat the holder (28) is a holding angle, wherein the profile fastening area is arranged on a first leg (50) and the gate fastening area (56) is arranged on a second leg (52). [5] Sectional door according to one of claims 2 to 4, characterized by that the profile fastening area (54) has a first screw receiving opening and a second screw receiving opening arranged at a distance therefrom in the longitudinal direction of the profile for receiving screw fasteners (40). [6] Sectional door according to one of claims 2 to 5, characterized by that the gate fastening area (56) has an elongated hole (58) which extends with a directional component transverse to the profile longitudinal direction. [7] Sectional door according to one of the preceding claims, characterized bythat the profile of the profile housing (24) has a C-shaped main channel (34) for receiving the light grid element (26), which C-shaped main channel has a light grid gap (42) for the light rays of the light grid. [8] Sectional door according to one of the preceding claims, characterized by that the profile of the profile housing (24) has at least one C-shaped or U-shaped side channel (46) which forms the holder receiving area (36). [9] Sectional door according to claim 8, characterized by that the C-profile or U-profile of the side channel (46) has a fastening gap (64) through which the holder (28) or a fastening element (40) for the holder (28) can pass, wherein the fastening gap (64) a) on a side region which runs substantially transversely to a front side having a light grid gap (42), or b) is located to the side of the light grid gap (42) on the front side. [10] Sectional door according to one of the preceding claims, characterized by that the profile housing (24) is designed symmetrically relative to a central longitudinal plane (44) running centrally to a light grid gap (42). [11] Sectional door according to one of the preceding claims, characterized by , that the spacer (68) has a first pair of contact areas (70) with a first distance (X), wherein the first pair of contact areas (70) can be connected to the profile housing (24) and to the guide rail (12), that the spacer (68) has a second pair of contact areas (74) with a second distance (Y), wherein the second pair of contact areas (74) can be connected to the profile housing (24) and to the guide rail (12), and that the first distance (X) is smaller than the second distance (Y) in order to make the guide rail (12) and the profile housing (24) spaced apart according to the arrangement of the spacer (68). [12] Sectional door according to one of the preceding claims, characterized by that at least one profile housing (24) of the light grid device (22) is arranged in a force-fitting or form-fitting manner on at least one of the running rails (12), wherein at least one first holder (28) of the light grid device (22) engages in a holder receiving area (36) of the profile housing (24) on the side area of ​​the profile housing (24) facing away from the running rail (12) and is fastened to prefabricated fastening openings in the interior of a frame (14) of the door (10). [13] Sectional door according to one of the preceding claims, characterized by that the at least one guide rail (12) gripped by the profile housing (24) extends obliquely, wherein the light plane running through the center of the light grid gap (42) extends on the center plane (44) of the part of the gate leaf (16) guided obliquely in the guide rail (12).

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