DE202006002000U1 - Door has light cabinet arrangement and has panel movable along predetermined path between opened and closed positions, cabinet arrangement having several, preferably vertically arranged light cabinets - Google Patents

Abstract

The door (10) has a light cabinet arrangement and has a panel movable along a predetermined path between opened and closed positions. The cabinet arrangement has several preferably vertically arranged light cabinets (21-29). Corresponding to a break in a light cabinet is a control device operable for stopping the door panel movement. The control device (31-39) is brought into function by at least one light cabinet by the approach (S) of a front edge (11) of the door panel to this light cabinet during a door panel closure movement. This light panel is deactivated when it is reached by the door panel front edge during the closure movement.

Description

The The invention relates to a gate with one along a predetermined path between an open position and a closed position movable door leaf, a light barrier arrangement with a plurality aligned transversely, in particular perpendicular to the predetermined path Photocells and one in response to an interruption of a light barrier for stopping the Torblattbewegung operable control device.

Gates of the type just described, for example, in factory buildings for the separation of different production areas, as room closure or in Form of garage or industrial doors used. The can Door leaves in so-called sectional doors a number of hinged together having associated door leaf elements, which in the closed position approximately in a vertical plane and in the open position over head are arranged approximately in a horizontal plane. Especially at the Separation of different production areas in production halls so-called film doors are also used, in which the door leaf in the form of a sheet-shaped Formed Behangs, in the closed position approximately in a vertical plane arranged and in the open position over or behind the fall of the opening to be closed on a suitable Winding shaft is wound up. In the described types of doors runs the given orbit in the direction of gravity, so that in the closing movement leading edge of the door leaf in the closed position at the bottom of the the door leaf to be closed opening abuts.

to Avoidance of personal accidents and property damage have to at the gates described measures are taken, with which the door leaf closing movement can be stopped, as soon as a person and / or an object in the range of the given Railway arrives. In this context, for example, the use so-called contact rails on the during the closing movement leading edge of the door leaf has been known. If such Contact rail in the course of the closing movement on an object or a person hits a control signal is triggered, which a stop of the Torblattbewegung and possibly a brief return of the door leaf in the direction of the open position causes. at high-speed film doors is the use of such contact rails problematic, however, because a considerable "stopping distance" is required to stop the door leaf movement, so that persons or damage to property even when triggered the braking process can not be excluded.

in the In view of this deficiency has already been the use of light barrier assemblies with a number of in the direction of the predetermined path in a row arranged and aligned perpendicular to the predetermined path Photocells with a corresponding control device of the beginning already proposed the type of interruption a light barrier is able to trigger a braking operation of the Torblattbewegung. In this description and the claims will be arrangements a light source, such as a light emitting diode or a diode laser and a light receiver, such as a photodiode referred to as light barriers, wherein the Propagation direction of the light emitted by the light source towards the light receiver is referred to as alignment of the light barrier. In the described Photocells arrangements with the help of individual light sources creates a light grid whose rays are usually approximately parallel to the closing movement leading edge of the Torblatt run. If any of these photocells is interrupted takes place immediately with the help of the control device the initiation of a braking operation of the Torblattbewegung. Thereby becomes a non-contact Protective function received. In conventional gates, the light barriers on the entire height the opening to be closed with the door leaf at predetermined intervals distributed arranged. At an opening height of three meters or more to achieve the desired protective effect 10 or more photocells needed. In the course of the closing movement of the door leaf are arranged in the closing direction one behind the other Photocells deactivated when the closing movement extending edge of the door leaf reaches the corresponding light barrier, so the triggering to prevent a braking operation by the Torblattbewegung itself.

At the Operation of the above-described doors with those described above Photocell arrangements, it has been shown that the individual Photoelectric sensors of the light barrier arrangement particularly frequently maintained or need to be replaced.

in view of These problems in the prior art, the object of the invention based on the safety requirements sufficient gates with light barrier arrangements provide, which require less maintenance.

According to the invention this object is achieved by a development of the known goals, which is characterized essentially in that the control device for activating at least one light barrier in response to an approach of a leading edge in a closing movement of the door leaf to this light barrier and to deactivate this light barrier in response to the Reaching this light barrier by the at Closing movement leading edge of the door leaf is operable.

These The invention is based on the knowledge that the maintenance frequency of the known gates is primarily due to the fact that the individual Photocells of the light barrier arrangement are permanently activated and only be disabled when the closing movement leading edge of the door leaf the corresponding photocell reached. In the development of the invention On the other hand, the light barriers are activated only when the photocell to obtain the desired security effect also really needed is, namely when the leading edge during the closing movement the door leaf of the corresponding light barrier has and will be Immediately disabled when the leading Torblattwand the corresponding Photoelectric barrier reached. Accordingly, in the development of the invention the gates described above a "light wave" in front of the leading Torblattrand generated, with the individual photocells always only be activated briefly. This will increase the total operating time the individual photocells without affecting the desired fuse effect shortens what an increased Service life and a reduced maintenance frequency has the result.

in the In the sense of an improved securing effect, it has proven to be expedient when the controller is responsive to the approach of the during the closing movement leading edge to a light barrier to activate this Photocell and at least one, preferably at least two, three or more further arranged in the closing direction behind it Photocell (s) is operable.

A further increase the fuse effect can be achieved if the light barrier arrangement at least one, in particular two, three or more, preferably in the bottom region of a wall opening to be closed with the door leaf permanently activated and only when approaching during the closing movement leading edge has disabled light barrier (s).

in the Regard to the relevant Safety regulations is a slowing down of the door leaf movement as well then required if the door leaf, for example, as a result of Impact of a vehicle, the predetermined path in a vertical to leave or perpendicular to the Torblattebene direction leaves. These Securing function can be achieved, in which the closing movement leading edge of the door panel provided with an additional switch is whose operation when leaving the predetermined path triggers a deceleration. A such additional However, safety device is associated with the defect that a signal transmission cable as another moving element of the door leaf in the Torblattbewegung be carried along got to. Thereby becomes the susceptibility conventional Goals increased. According to one Another aspect of the invention, this deficiency is characterized eliminated that Light barrier arrangement at least one approximately parallel to the predetermined path aligned light barrier, which stops the Torblattbewegung is designed when the door leaf the predetermined path in a transverse to this direction leaves. at This light barrier arrangement can be a signal triggering the deceleration process be generated by a light path released in the direction of the light source to the light receiver when the door leaf leaves the predetermined path. As already explained at the beginning, the invention can be used with particular advantage in such gates be, the door leaf a wound up in the closed position, preferably having transverse to the predetermined path oriented reinforcing elements or bars web-like Covered with hangings.

below the invention with reference to the drawing, with respect to all essential to the invention and unspecified in the description Details specifically is referenced explained.

In the drawing shows:

1 a schematic representation of a door according to the invention and

2 a schematic representation of a door according to the invention along the in 1 specified cutting plane AA.

This in 1 Tor shown comprises a door leaf in the form of a web-shaped curtain 10 in the closed position on a winding shaft 12 is windable. The closing movement of the door leaf is achieved by means of guide rails running in the direction of gravity 14 such that a leading in the closing movement lower edge 11 in the form of a final profile of metal, plastic or rubber of the door leaf 10 in the closed position on the floor 16 the opening to be closed with the door leaf, while the door leaf 10 in the open position on the above the opening to be closed arranged winding shaft 12 is wound up. In the area of in 1 illustrated right guide rail 14 is a number of in the closing direction S at predetermined intervals successively arranged light sources 21 to 29 arranged while in the area of in 1 left guide rail 14 a number of in the closing direction S at predetermined intervals successively arranged light receivers 31 to 39 disposed is. Here are the light receiver 31 to 39 arranged such that they each only light from a light source associated with them 21 to 29 receive. When the light path from one of the light emitters 21 to 29 to the light receiver associated with it 31 to 38 before reaching during the closing movement of the door leaf 11 running edge is interrupted, the closing movement can be slowed down.

In the gate according to the invention, the light sources 21 to 28 controlled such that only the three in the closing direction S before the leading edge 11 arranged light sources are activated until this edge reaches the light sources. At the in 1 Accordingly, only the light sources are shown in the illustration of the door leaf 21 to 23 activated while the light sources 24 to 28 are disabled. As soon as the leading edge 11 one of the light sources 21 reached, this corresponding light source is deactivated and activated in the closing direction next light source. This means that in the course of the closing movement starting from the in 1 shown position, first, the light source 21 disabled and the light source 24 is activated. If the leading edge during the closing movement 11 in the 1 dashed indicated intermediate position has reached, are the light sources 21 to 23 disabled while the light sources 24 to 26 are activated. The light sources 27 and 28 will be activated in the further course of the closing movement. In the embodiment of the invention shown in the drawing, the light sources 29 in the area of the soil 16 the one with the door leaf 10 to be closed opening permanently activated and are not deactivated until the leading edge during the closing movement 11 of the door leaf 10 reached these light sources.

As the illustration in 2 can be seen, the light path from the light sources 21 to 29 to the light receivers 31 to 39 chosen so that it is perpendicular to the given path but an acute angle α with the curtain 10 encloses in the closed position. This can be achieved that even with a deformation of the curtain 10 still an interruption of the light path takes place.

The The invention is not limited to the embodiment explained with reference to the drawing limited. Rather, the invention also in connection with so-called Sectional doors are used. It is also thought to be two or less, or four or more light sources in response to the approach of the closing movement leading edge of the door leaf to activate. Also, the Light path from the light sources to the light receivers can be chosen differently.

Claims (6)

Gate with a door leaf movable along a predetermined path between an open position and a closed position, a light barrier arrangement with a number of light barriers oriented transversely, in particular perpendicular to the predetermined path, and a control device operable in response to an interruption of a light barrier for stopping the door leaf movement, characterized the control device is operable to activate at least one light barrier in response to an approach of an edge of the door leaf leading to a closing movement to this light barrier and to deactivate this light barrier in response to the reaching of said light barrier by the edge of the door leaf running during the closing movement. Gate according to claim 2, characterized in that the control device appealing to the approach of the closing movement leading edge to a light barrier to activate this Photocell and at least one, preferably at least two, three or more further arranged in the closing direction behind it Photocell (s) is operable. Gate according to one of the preceding claims, characterized characterized in that Light barrier arrangement at least one, in particular two, three or more preferably in the bottom region of the door leaf with occlusive Wall opening arranged, permanently activated and only when these light barriers are reached by the at the closing movement leading edge has disabled light barrier (s). Gate according to one of the preceding claims, characterized characterized in that Light barrier arrangement at least one approximately perpendicular to the predetermined Path and an acute angle with the door leaf in the closed position inclusive Photocell has. Gate, in particular according to one of the preceding claims, with one along a predetermined path between an open position and a closed position movable door leaf, a light barrier arrangement with at least a photocell and in response to a change in the Operating state of the light barrier for stopping the door leaf movement operable control device, characterized in that the light barrier arrangement at least one aligned approximately parallel to the predetermined path Has light barrier, and the control device for stopping the Torblattbewegung is designed when the door leaf the default Leaves train in a direction transverse to it. Gate according to one of the preceding claims, characterized characterized in that Door leaf one in the closed position windable, preferably aligned transversely to the predetermined path reinforcing elements having web-like Covered with hangings.