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 configured 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) configured to emit or receive the series of light beams, wherein the profile housing (24) abuts 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 the guide rail (12) in a form-fitting manner,or wherein the light grid device (22) further comprises at least one spacer (68) for spacing the guide rail (12) from the profile housing (24), wherein at least one profile housing (24) of the light grid device (22) is indirectly arranged to be frictionally or positively engaged with at least one of the guide rails (12) by means of spacers (68) inserted between the profile housing (24) of the light grid device (22) and at least one guide rail (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 region of the profile housing (24) facing away from the guide rail (12) and is attached to prefabricated mounting openings inside a frame (14) of the gate (10).

Description

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

[0002] Automatically operated gates come in many designs and configurations. One type of gate for which this invention is particularly intended and suitable is the sectional door, which has a gate leaf formed from several hinged door panels and guided in lateral tracks attached to a frame. However, the light grid system described here is also of interest for other overhead gates such as roller doors, high-speed doors, or lifting doors.

[0003] It is common practice to secure automatically operated gates using optical safety devices such as photocells. These photocells are designed to detect obstacles entering the path of a closing gate, thereby halting the closing process and retracting the gate leaf slightly. Individual photocells are typically installed close to the ground in the gate's path. However, there are also moving obstacles that initially enter the gate's path slightly above ground level. A forklift with a slightly raised load serves as an example. With a raised load, a single photocell mounted at ground level would not be interrupted initially, even though the gate's path is already blocked. Therefore, it is common practice, particularly in the field of industrial gates, to secure automatically operated gates with light curtains. Light curtain systems are already available on the market for this purpose.Another example of a previously known light curtain safety device is described in the company brochure "Vario B - Switching Light Curtain for Object Detection" by Leuze Elektronik, distributed, among other places, via the internet, and downloaded on August 4, 2012. For further technical details of such light curtains, please refer to this brochure. Light curtains can be visualized as a series of light barriers arranged along a safety plane. The multiple transmitters and receivers are typically housed together on a circuit board, which is elongated accordingly.

[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 mounted with its back side flush against the frame of a gate. 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 gate leaf in a housing. The housing is cuboid in shape.

[0006] The invention aims to improve gates equipped with light curtain safety devices, particularly with regard to the reliable detection of obstacles near the gate path, simpler manufacturing, and / or simpler installation. Furthermore, it aims to create a gate, especially a sectional door, that is better and more easily secured with a light curtain.

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

[0008] Advantageous embodiments of the invention are the subject of the dependent claims.

[0009] The invention provides a sectional door with an automatically driven door leaf guided in a first and a second track 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 configured to emit and / or receive a series of light beams along a door path defined by the tracks, wherein the light grid device comprises a profile housing for receiving an elongated light grid element configured for emitting or receiving the series of light beams, the profile housing bearing against the track 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, with 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 which has a profile mounting area and a gate mounting area, wherein the profile housing has an elongated holder receiving area for positively locking the profile mounting area of ​​the holder in a manner displaceable along the longitudinal direction of the profile.

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

[0012] It is preferred that the holder is a retaining bracket, wherein the profile mounting area is arranged on a first leg and the gate mounting 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 spaced apart from it in the longitudinal direction of the profile for receiving fastening screws.

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

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

[0016] It is preferred that the installation area has a projection for form-fitting engagement, in particular for gripping behind the running 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 slit for the light rays 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 that forms the holder receiving area.

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

[0020] It is preferred that the profile housing is symmetrical relative to a central longitudinal plane running towards a light grating slit.

[0021] It is preferred that the light grid device includes at least one spacer for spacing the guide 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 is connectable to the profile housing and to the running rail.

[0023] It is preferred that the spacer has a second pair of contact areas with a second spacing, 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 be larger than the second distance in order to allow the guide rail and the profile housing to be spaced apart according to the arrangement of the spacer.

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

[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 to abut at least one of the guide rails in a force-fit or form-fit manner, preferably on this side held solely by the force-fit or form-fit without additional fastening elements, wherein at least one first holder of the light grid device, preferably at least one first and a spaced-apart second holder, engages in the holder receptacle on the side area of ​​the profile housing facing away from the guide rail and is attached 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 indirectly arranged against at least one of the guide rails by means of spacers inserted between the profile housing of the light grid device and at least one guide rail, preferably on this side solely by the force or form fit without additional fastening elements, wherein at least one first holder of the light grid device, preferably at least one first and a spaced-apart second holder, engages in the holder receptacle on the side area of ​​the profile housing facing away from the guide rail and is attached to prefabricated fastening openings in a frame of the gate.

[0028] It is preferred that the at least one guide rail encompassed by the profile housing extends obliquely, wherein the light plane passing through the center of the light grid gap extends on the central 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 with the center of the gate slat guided in the track by its position against the gate's running rail; - the light grid profile is infinitely adjustable and axially secured along the running rail, e.g. by screw connections in the area between holder and profile housing; - by means of a projection, e.g. a nose / ridge present on the light grid profile, tilting of the light grid profile is prevented; - Space-saving installation in the gate frame: when the gate is closed, the light grid is protected from potential damage (vandalism, etc.); - quick and safe assembly; - By connecting the light grid profile to the holder laterally (e.g. mounting bracket), the smallest possible height of the light grid is achieved; and / or - The existing hole pattern on the frame is used to attach the light grid profile.

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

[0031] Advantages of this variant can include: it allows for machine 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 an aluminum profile. In another design, the housing profile is extruded from a plastic housing profile.

[0033] The desired length of the light curtain device along the profile can be adjusted to the gate height to be secured by cutting a section of the profile to length. The housing profile preferably accommodates an elongated light curtain circuit board, which is, for example, 1.8 to 3 m long, preferably about 2.5 m. The circuit board can be a transmitter board or a receiver board. It is also possible to combine the transmitter and receiver on a single circuit board or in a profile housing and to provide a reflector for the light beams on the opposite side of the gate.

[0034] One advantage of combining a bracket on one side with a track mounting on the other is that installing fasteners on the brackets on one side is sufficient to ensure the light curtain is correctly aligned. For example, on one side, the mounting can be achieved via screws, preferably in pre-drilled holes in the frame, while on the other side, a frictional connection, or preferably a positive connection, such as a rear engagement behind the track, is provided. For example, the housing profile has a projection, such as a lug, at a rear and lower corner that engages under the track.

[0035] Preferably, several holders are provided at intervals on the holder mounting receptacle. A multiple mounting could, for example, comprise three or more holders, e.g., one holder at the bottom, one or more in the middle, and one at the top.

[0036] Especially when the profile housing is clamped to the track by force or form fit and / or axially secured, e.g., with 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 mounted flush against the track, a secure alignment can still be achieved. If the profile housing is placed against, for example, the pre-assembled track of an industrially manufactured gate, the light curtain is immediately positioned correctly relative to the gate's path defined by the track. Simple and correct installation is further facilitated by the use of pre-drilled holes in the gate frame for mounting the bracket.

[0037] In a particularly preferred embodiment, simple hexagonal screws are used as clamping screws between the holder receptacle and the holder. The hexagonal 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 about the screw axis. Thus, the clamping screw sits with its head in the C-profile and is infinitely adjustable and rotationally secure.

[0038] The mounting area for the bracket, which is preferably designed as an angle bracket, is preferably a slotted hole. The frame of commercially available sectional doors from Hörmann KG has several pre-drilled mounting holes, which are, for example, arranged in pairs in a row. For further details, particularly regarding the construction of the sectional doors and the possible routing of the guide rails, please refer to the attached company publications "Installation Data for Industrial Sectional Doors, dated July 1, 2012," the brochure "Industrial Sectional Doors," printed June 2011, and "Installation Data for Industrial Sectional Door DPU," dated July 1, 2012, all from Hörmann KG, which were received on August 6, 2012, via the internet.

[0039] The guide rails of these sectional doors run at an angle in at least some installation variations; the bracket is preferably adapted to the angled guide rail with an elongated hole that runs diagonally towards the profile mounting area. Due to the angle, the elongated hole always covers at least one of the pre-drilled holes, allowing the bracket to be screwed in place.

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

[0041] The manufacturing process for each light grid element preferably involves providing the profile housing, then inserting the circuit board (even in lengths of around 2.5m) from a small open side, and subsequently filling any remaining cavities with a suitable curable material, e.g. casting resin, to protect and fix the circuit board.

[0042] Exemplary embodiments of the invention are explained in more detail below with reference to the accompanying drawing. This drawing shows: Fig. 1. A horizontal section through a lateral part of an automatically driven gate, using the example of a sectional door with a light grid safety device; Fig. 2 an enlarged detail of the illustration 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 gate; Fig. 3 a side view from the center of the gate opening of the gate frame with guide rail and light grid device at the lower part of the gate, near the ground; Fig. 4 a perspective view of the lower lateral corner area of ​​the gate, which is 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 another 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 another 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 another perspective view of the third embodiment of the light grid device; Fig. 11 a schematic perspective representation of a fourth embodiment of the light grid device; Fig. 12 a perspective partial view of the frame of the gate with running rail and light grid device; Fig. 13 a side view from the center of the gate opening of the gate frame with guide rail and light grid device at the lower part of the gate, near the ground; Fig. 14 a perspective schematic representation of a fifth embodiment of the light grid device; Fig. 15 a further perspective schematic representation 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. Figure 4 shows an automatically operated gate 10, here, for example, a sectional door, with a gate leaf 16 guided in tracks 12 on a frame 14 and automatically driven by a gate drive (not shown), in particular constructed from door panels 18. Only one side area of ​​the gate 10 is shown in the figures, for example, the lower right area. The opposite side area of ​​the gate 10 is designed as a mirror image, so that it can be omitted from its depiction. For further details regarding the possible general construction of the sectional door, the possible routing and construction of the tracks 12, as well as the design of the frames, reference is made to the attached publications "Installation Data for Industrial Sectional Doors, dated July 1, 2012", brochure "Industrial Sectional Doors", print 06, 2011, and "Installation Data for Industrial Sectional Door DPU", dated July 1, 2012, from Hörmann KG.It also explains and shows a possible gate drive in more detail.

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

[0045] Each light grid device 22 has a profile housing 24, a light grid element 26 housed therein and several holders 28, of which only one holder 28 is shown in each of 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 sending the light beams, or a light grid receiver element with an elongated receiver board 32 for individually resolving the individual light beams.

[0047] The profile housing 24 has a C-shaped profiled main channel 34 in which the light grid element 26 is inserted and potted with filler material, 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 grating slit 42 through which the light rays are sent and received. In Fig. Figure 1 shows the median plane 44 passing through the center of this light grating slit 42, represented by the profile housing 24. The light rays are transmitted and received along this median plane 44; thus, this median plane 44 indicates the light grating generated by the light rays.

[0049] The profile housing 24 is symmetrical to this central 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 essentially hug the running rail 12 along the entire length of the profile housing.

[0051] The profile housing 24 is arranged with one narrow longitudinal side adjacent to the running rail 12 and is attached on the other narrow longitudinal side with the holder to pre-made openings within the frame 14.

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

[0053] The anchoring option which can be moved along the profile length of the profile housing 24 and the elongated hole 58 allow the gate mounting area 56 to be adapted to an inclined course of the guide rails 12.

[0054] Due to the mounting of the profile housing on the guide rail, the light plane, represented by the center plane 44, always adapts to the path of the gate. The center plane 44 is preferably arranged over the entire distance to be secured such that it extends through the center plane of the gate slats 18 of the gate leaf 16, which are guided on the guide rail 12. Thus, with only one light plane, the entry of an object from both sides of the gate is monitored with the same level of safety.

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

[0056] During 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. The profile housing 24 engages with this projection 60, as shown in Figure 6. Fig. 2 is shown, positively locking behind the running rail 12.

[0057] In the first embodiment, the first leg 50 of the holder 28 has bores spaced apart from each other in the longitudinal direction of the profile. The clamping screws 40 engage through these bores. Their hexagonal heads engage slidably but in a rotationally secure manner in the C-shaped side channel 46, where they are clamped by tightening nuts. Thus, with the clamping screws 40 loosened, the holder 28 can be moved along the profile housing 24 until a suitable pre-made opening in the frame 14 is reached and its position is adjusted accordingly.

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

[0059] By clamping the clamping screws 40, the profile housing 24 is axially secured; i.e., 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 need to rest on the ground; in Fig. 3 This is indicated by the clear distance between profile housing 24 and the floor.

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

[0062] During the Fig. 9 and Fig. In the embodiment shown in Figure 10, the retaining bracket is manufactured, for example, from plastic, such that an engagement area 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 securing; however, this variant could also be modified by providing axial securing, for example, by a small screw screwed into the T-slot.

[0063] At the in Fig. In the embodiment shown in Figure 11, the mounting gap 64 of the holder receiving area 36 does not open 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 thread-forming screws, to be handled from the front, thus simplifying assembly. In this embodiment, the side channel 46 is U-shaped rather than C-shaped; the positive locking is achieved in particular by the thread engagement of the screw fasteners 40.

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

[0065] If the gate slats 18 are very thick, it is necessary to position the light grid device 22 at a distance from the guide rail 12 so that the light rays travel in the central plane 44. The in the Fig. 12 to Fig. The embodiment shown in Figure 16 additionally features several spacers 68 for distancing the guide rail 12 from the profile housing 24, of which only one spacer 68 is shown in each figure. The spacers 68 are, for example, made of plastic ( Fig. 12 to Fig. 15) or metal ( Fig. 16) manufactured. 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 to be connectable to the profile housing 24 and to the guide rail 12. Two contact surfaces of the first pair of contact areas 70 are spaced X apart, and two contact surfaces of the second pair of contact areas 74 are spaced Y apart. 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. This allows the guide rail 12 to be spaced apart from the profile housing 24 according to the arrangement of the spacer 68, depending on whether the spacer 68 is arranged parallel to the direction of the guide rail 12 with the direction of distance X or with the direction of distance Y.

[0066] The spacer 68 is, as in the Fig. 12 and Fig. 13, inserted between the guide rail 12 and the profile housing 24, and the holder 28 is provided opposite the spacer 68 in the profile mounting area 54. The spacer is attached to the profile housing 24 in the gate mounting area 54. One contact surface of the spacer 68 faces the gate mounting area 54, while another contact surface of the spacer 68 faces the guide rail 12. The spacer 68 is arranged so that it is force-fit or form-fit connected to the guide rail 12 and is preferably held without additional fasteners. Through the force-fit or form-fit connection of the spacer 68 to the guide rail 12 and attached to the gate mounting area 54, the profile housing 24 is indirectly arranged to rest against the guide rail 12 in a force-fit or form-fit manner. In this case, the profile housing 24 has a distance X from the guide rail 12. If the spacer 68 is, as in Fig. 15 shown, at 90° opposite the ones in the Fig. 12 to Fig. 14 and Fig. In the 16 cases shown, the profile housing 24 is rotated, so it has a distance Y from the running rail 12.

[0067] In the Fig. 1 to Fig. In the sectional door shown in Figure 4, the track 12 runs at an angle. Due to the design of 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 path of the light grid is always adjusted to the door's path by its contact with the track 12. This ensures that even with different track configurations, as mentioned in the aforementioned Hörmann KG company publications, the light grid is always correctly aligned. This design is suitable, for example, for 40 mm wide door panels 18.

[0068] If the gate slats 18 are, for example, 67 mm wide, the spacer 68 is preferably used as in the Fig. 12 to Fig. 14 and Fig. 16 arranged and the length of the gap X is 13.5 mm. If the width of the gate slats 18 is 100 mm, the spacer 68 is preferably arranged as shown in Fig. The profile housing 24 is arranged as shown in Figure 15, and the length of the distance Y is 30 mm. The profile housing 24 is indirectly positioned against the inclined guide rail 12 by means of 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. Reference symbol list 10 goals 12 Running rail 14 frame 16 gate leaves 18 Gate slat 20 light grid safety device 22 Light grid device 24 profile enclosures 26 light grid element 28 holders 30 transmitter boards 32 receiver board 34 Main Channel 36 Holder mounting area 40 screw fasteners (e.g. clamping screws or thread-forming screws) 42 Light grid gap 44 Middle level 46 Side channel (e.g. C-shaped or U-shaped) 48 Investment area 50 first thigh 52 second thigh 54 Profile mounting area 56 Gate mounting area 58 Slotted hole 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 configured 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) configured to emit or receive the series of light beams, wherein the profile housing (24) rests 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 the guide rail (12) in a form-fitting manner,or wherein the light grid device (22) further comprises at least one spacer (68) for spacing the guide rail (12) from the profile housing (24), wherein at least one profile housing (24) of the light grid device (22) is indirectly arranged to be frictionally or positively engaged with at least one of the guide rails (12) by means of spacers (68) inserted between the profile housing (24) of the light grid device (22) and at least one guide rail (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 region of the profile housing (24) facing away from the guide rail (12) and is attached to prefabricated mounting openings inside a frame (14) of the tray (10). [2] Sectional door according to claim 1, characterized by, that the light grid device (22) comprises a holder (28) having a profile mounting area (54) and a gate mounting area (56), wherein the profile housing (24) has an elongated holder receiving area (36) for anchoring the profile mounting area (54) of the holder (28) in a manner displaceable along the longitudinal direction of the profile. [3] Sectional door according to claim 2, characterized by , that the profile fastening area (54) extends in a first direction to be supported on or in the holder receiving area (36) at at least two points spaced apart in the longitudinal direction of the profile or on at least one line extending in the longitudinal direction of the profile, and / or that the gate mounting area (56) extends in a second direction to compensate for different lateral distances to predetermined mounting points on the gate (10). [4] Sectional door according to claim 2 or 3, characterized by, that the holder (28) is a retaining bracket, 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 spaced apart from it in the longitudinal direction of the profile for receiving screw fasteners (40). [6] Sectional door according to any 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 by, that 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 slit (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) extends, wherein the fastening gap (64) a) on a side region which is substantially transverse to a front face having a light grating slit (42), or b) is located to the side of the light grid slit (42) on the front side. [10] Sectional door according to any of the preceding claims, characterized by , that the profile housing (24) is symmetrically formed relative to a central longitudinal plane (44) running towards a light grid slit (42). [11] Sectional door according to any 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) spaceable according to the arrangement of the spacer (68). [12] Sectional door according to any of the preceding claims, characterized by , that at least one profile housing (24) of the light grid device (22) is arranged to be force-fit or form-fit against at least one of the guide 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 guide rail (12) and is attached to prefabricated fastening openings inside a frame (14) of the gate (10). [13] Sectional door according to any of the preceding claims, characterized by , that the at least one guide rail (12) encompassed by the profile housing (24) extends obliquely, wherein the light plane passing through the center of the light grid gap (42) extends on the central plane (44) of the part of the gate leaf (16) guided obliquely in the guide rail (12).

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