DE3545057A1 - Accident-protection strip - Google Patents

Abstract

Elastically deformable accident-protection strip on the lower edge of a driven door leaf with at least one cavity which extends in the longitudinal direction of the strip and is connected to a pressure/signal transducer. For emitting a reliable signal in the initial phase of the compression of the strip and of the compensation of a follow-on movement of the door leaf over a relatively large remaining compression path, the accident-protection strip is configured such that the cavity is connected to a chamber in which a switching body is mounted such that it can be shifted. In each position of the door leaf, said switching body is forced into a specific operational shift position, directed towards the connection opening in the chamber, such that the switching body is moved on from its operational shift position by the medium, displaced when the strip is deformed and entering into the chamber through the opening, and, when the transferring medium subsides and it is actuated, moves back into said shift position, which shift movement of the switching body forms the criterion for the signal.

Description

The invention relates to an accident protection strip with the Features of the preamble of claim 1.

Accident protection strips of the type in question here it in different versions, such as electrical contact threshold or in particular in Form of a cavity provided in the bar, the volume changes when hitting an obstacle wrestles so that an enclosed in this cavity Gas, usually air, is displaced, which leads to triggers solution of a pressure switch is used. The contact threshold or the cavity practically extends over the length of the bar, which in turn over the Ge total length of the edge of the Door leaf is arranged away. Hit the gate leaf in the course of the closing movement with its in closing directional edge and thus the accident protection hit an obstacle, a signal is given, that for switching off or switching the door leaf movement is exploited. The facilities required for this are known.

Such accident protection strips have one problem in common, that as soon as possible after hitting an obstacle to the shutdown or switchover signal for the on should generate drive, but on the other hand because the inertia a certain wake occurs where but not damaging as much as possible to be pressurized. So it should be inside a signal of a first compression of the bar are triggered while a residual compressibility after recording the trailing movement of the door leaf Switching off or switching should serve. To make one conventional accident protection strip with a cavity like this voluminous that the cavity in the direction of movement Gate edge of the switching path and the overrun path is really compressible, so the volume  change in the initial area of compression of the Cavity ledge to only a slight increase in pressure on Lead pressure wave switch. The pressure wave switch de therefore not or only in the event of further compression and switch the pressure increase so late that the rest compressibility of the cavity strip the overrun of the door leaf is no longer sufficient. It must be taken into account be done that with pressure-tight closed system between cavity and pressure chamber of the pressure wave switch this also the maximum pressure increase with complete shut the cavity bar is pressed together non-destructively must take. Finally comes with a gaseous me dium its compressibility complicates one sensitive switching threshold added, so that a total large-volume cavity strip to the tasks not enough.

The invention has for its object an accident protective strip of the type mentioned to create the a safe one in an initial phase of compression Switching signal allowed to generate and a large rest compression path that has a damaging Be impairment of one recorded in the door leaf movement path Obstacle prevented.

Starting from an accident protection bar with the Merkma len the preamble of claim 1, this is gave according to the invention by its characteristic note times solved.

According to the ent the displaced volume ent speaking amount of the medium targeted through a mouth pressed against a switch body, in such a way that the men passing through the corresponding narrow mouth a significant acceleration of the liquid  reaches. The switching body is thus of the kinetic Energy of the rays bundled through the mouth Medium volume applied and is therefore already from ge wrestle volume changes and thus ge through the mouth carried medium quantities from its normal operation speaking misalignment at the mouth in one of them distant position moved. Because the space of the hollow body and the connecting line not through the switch body is closed, but past this medium in egg space beyond the switch body traffic jam does not occur if due to a corresponding accordingly greater displacement or compression of the Apply correspondingly higher amounts of the medium through the Through the mouth. The switching path of the switch body can be easily limited; the movement of the Switch body itself is used to generate an off or Umschaltsignales exploited what ge in many ways can happen. As soon as it came through the mouth into the Kam If the medium flow exceeds, the moves Switch body back into its operating position in the Close area of the mouth. So it will only be a volu change in the course of their change per unit of time triggered for signal generation. Then the Switch body back to its starting position, which generated However, the signal leads to a permanent decrease or change circuit of the drive motor operation, which by reason additionally known circuits such as latches from Relay or the like can be achieved.

In this way, dynamic actuation is achieved of the switch body, which is already at low transition amounts of the medium from the cavity or cavities in the the chamber containing the switch body can be reached can easily, while significantly larger quantities can also act on the switch body without to change the switching threshold or the switching body affect mechanism.  

In a preferred embodiment, instead of a gaseous one Medium that, due to its compressibility, is like a damping spring acts with a liquid medium gear processed, here again preferably with a liquid low viscosity so that the resistance at through enter the opening, which is designed like a nozzle can not be a correspondingly high resistance leads to the compression of the bar. On the other hand should be within the temperature range in question the liquid medium does not tend to evaporate. A Solidification must of course be avoided you become a frost-protected liquid with external doors speed, for example with an antifreeze use speaking water.

In a particularly preferred training, at least a cavity in the closing direction and if necessary also the opening direction of the door front edge of the accident protection strip seen, the remaining area then the function of a Carrying profile takes over. This ensures that in egg ner initial phase of the compression of the bar next only the cavity or cavities or one of these cavities is compressed, via the cross lying in the direction of movement of the door leaf sectional dimension of this or these cavities, whereby the signal for switching off or switching on drive motor is triggered while thereupon the support profile for further compression of the bar in the In the course of the trailing of the door leaf deformed accordingly becomes. This has the particular advantage that for the Sig generation of the entire compression distance of the or the cavities are exploited while for the wake operation of the door leaf the deformation of the remaining part the bar is used in the form of the support profile, without further displacement of the medium taking place.  The compression of the support profile outside the or the cavities therefore have no signaling function. The accident protection strip is therefore in the course of their together pressure divided into two gradual functions, in the the first phase of compression, the cavity is ver narrows, in the second, the wake of the gate leaf tes serving phase is only the support profile as deformed such. For this purpose, the support profile stiffer in compression than dasje some of the hollow arranged in its front area rooms. This can be done by designing the tub of the support profile on the one hand and the or Reaching voids on the other hand, be it through molding exercise or by wall thicknesses, especially in front Zugter one-piece formation of the or the cavities on the support profile. In the sense of a particularly sensitive Chen and fast signal generation, this is preferred achieved in that the support profile is elastic overall is formed deformable and one in the length of the ledge at least part of the directional deformation space includes, the cross-sectional dimension of the ver formation space a multiple of that of the Cavities. This makes it very sensitive Licher way already when feeling an obstacle in the In the course of a first compression phase, the outer wall of the cavity or cavities across their cross-section press together and thus already a switchover or switchover Trigger signal for the drive motor before for the Follow-up phase of the door leaf is relatively large This compression path by pressing the verfor space of the support profile takes up space. The Verfor space of the support profile can basically be closed sen are formed so that with gaseous filling a kind of buffer arises, in a preferred embodiment can this deformation space also ge to the atmosphere opens, so that practically only the deformation resistance  stood the deformation space from the support profile to is at least partially encompassed, for the corresponding soft elastic attack available on the obstacle stands. The pressure signal converter is put together pressing on the deformation space of the support profile limited press-in process then not charged.

The cavity or cavities are preferably in one Front edge area of their dimensions via a connector cable with the cam containing the switch body always connected. The cavity or cavities are otherwise completed. The chamber, however, is in the area of Mouth of the chamber opposite the switch body area not completed, in the case of Ver use of a liquid medium in the form of one there seen storage vessel, which can be ventilated or works against a gaseous cushion. Basically If there are several cavities, each can have its own Pressure signal converter to be connected. So that gets one due to the volume change ratio particularly sensitive device. However, it gets skin enough, several cavities with regard to their ver bond to a chamber of a pressure signal converter summarize, so that all cavities to the Mün a chamber are connected.

The pressure signal converter (s) is or are on the Door leaf - preferably arranged on the inside - in the case of multi-unit door leaves at the bottom stem panel, so that there is a rigid or flexible Lei short distance between the cavity or cavities and the chamber of the pressure signal converter leaves. The basic possibility of such a lei tion also to an outside of the door leaf Laying the pressure signal converter is simplified, if only the electri generated by the converter signal via wire or wireless to one  Activate and deactivate the drive motor Forwarded recipients outside the door leaf that must.

In a preferred embodiment, the switching body is inside guided the chamber in terms of its movement, preferably as a ball or cylindrical round body formed within a tubular guide of the Chamber. The guide is between the switch body and the chamber inner wall designed such that the Medium between the switch body and the guide wall finds a bypass. That means that only the Passing through the preferably nozzle-shaped mouth shaped medium jet in the course of the compression Moved body from its operational transfer position, in the usual but in both directions between the leaders chamber walls and the switch body can flow past, if the dynamic component of the compression of the medium jet or cavities occurring ebbs. The in the course of the compression of the Cavities moving switch body is so together pressure back into its operational relocation position returned. This can be done under spring force, preferably but done under the force of gravity, for what also a combination of gravity and spring striking can be provided. So that is achieved that the switch body after completion of the compression operation of the or the hollow body in its by the coin remains distant location, it will in any case set back towards the mouth. With a spherical switch body can be achieved in a simple manner in that the diameter of the ball is smaller than that that of the tubular guide is dimensioned at one leave at least partially cylindrical switch body on the lateral surface approximately parallel to the longitudinal axis of the cylinder provide ribs or depressions that as  Serve bypasses for the medium. Through this independent Return of the switch body in its Betriebsver setting position is achieved when hitting a Obstacle measures to restart the drive bes for the gate only in the electrical circuit measures of the engine must be taken but not in the area of the pressure-signal converter. On this is the accident prevention bar according to the inven can also be used as a limit switch or the over testing their functionality at every closing and if necessary, opening process can also be used. In such a case, you just have to make sure that when the door leaf reaches the closed position or the cavities are compressed, whichever gives otherwise by a corresponding stop in the end range of the gate closing movement easily accessible is. In the case of a limit switch function for the opening Position can be easily - for example wise mechanically - also a compression of the or of the cavities, for example through a Rocker arm so that the pressure-signal converter is optional or each time the closed position is reached and / or the opening position of the door leaf generates a signal. Due to the special peculiarity that the switching body in automatically after completion of the compression process can get into its operational relocation position this converter at the same time as a limit switch or at least but by his signaling in this gate movement end Use positions as a function check criterion. As part of the receiver or switch-off or switchover device tion can be simple and circuitry be known way to ensure that the drive movement direction after the arrival of such a signal is only possible in the opposite direction of movement. This is anyway when the closing and opening position is reached required and when the door leaf hits the train its trajectory towards an obstacle in the sense of this Accident protection device displayed.  

In the case of door leaves that are positioned horizontally between the closed position and the open position do not change , is in the case of a gravity-operated switching body Usually a guide running in the vertical direction be right. For single-leaf or multi-part Door leaves between a vertical lock development and an approximately horizontal opening position be moved, the guide of the switching body is oblique arranged to the horizontal, in particular at 45 ° art that the switch body always ent under gravity long his leadership in the relocation position hit.

Implementation of the movement of the switch body by Zu compressing the one or more hollow bodies in an electrical signal in particular can differ that way. It is preferred to be like this proceed that the converter in the manner of a "break contact" works, i.e. it is used to monitor the function Efficiency in the operational setting of the switch body given a continuous signal. This can, for example se done by a light barrier above the Operating shift position of the switch body is arranged and in the radiation area of the switch body at Be impact by the medium in the event of an obstacle or Limit switch trap occurs. It can be general mine to interrupt a wave path between egg act a sender and a receiver, the waves must do not lie in the visible light range. Also acoustic wave ranges are conceivable. Hereby is also shown the possibility of passing on the Signals to a receiver outside the door leaf wirelessly. It is also conceivable to switch body as part of an electrostatic or in particular to develop their electromagnetic system,  that field sizes are changed when the switching body under the radiative medium when together pressing the cavity (s) of the accident protection strip moved out of its operational relocation position. Here can the switch body as a soft iron magnet or as Permanent magnet may be formed and in a known manner netic attraction or induction processes be Act. Of course, the total must preferably be as Tube trained chamber in terms of its material for the respective waves or fields accordingly be consistently trained.

In particular in the case of liquid media, this can also be done from a tightness monitoring of the cavity or cavities, their connection to and through the chamber itself monitor the liquid level. To there is a variety of mechanical, optical and counter possibly also electrical or electromagnetic Possibilities, the latter in that the liquid is appropriately conductive.

Further refinements of the invention result from Subclaims, in particular in connection with the exemplary embodiments shown in the drawing, to which particular reference is made and their successor The present invention is explained in more detail. It demonstrate:

Fig. 1 is a perspective interior view of a closed ceiling sectional door as an application example for an accident protection strip;

Fig. 2 is a shortened reproduced perspective view of a first embodiment of the accident protection strip;

Fig. 3 is a cross-sectional view of another embodiment of the accident protection strip;

Fig. 4 shows a third embodiment of the accident protection bar;

Figs. 5 and 6 shows the arrangement of an embodiment with a pressure-signal transducer to the position in the closing of the lowermost panel Deckengliederto 1 res of FIG in the closed position and in open position of the door leaf.

Fig. 7 is an enlarged cross-sectional view of the chamber area, showing the switch body in the Betriebsversetzstellung;

Fig. 8 is a sectional view taken along line VIII-VIII in Fig. 7.

The overhead 1 of FIG. 1 is a kind of conventional construction, the door leaf 2 runs via panels on the door leaf side-mounted rollers in guide rails 3 have a substantially vertical portion, in which the rollers of the door leaf 2 to be in its closed position and the arcuate into a horizontal section from where the rollers are when the door leaf 2 is completely transferred to its opening position. The weight compensation of the Torblat tes 2 serve in a known manner torsion springs 4 which are arranged on a shaft above the door opening and hold the door leaf via cable drums and ropes. In the area of this shaft a drive is provided, which can also be designed as a trailing drive in the area near the ceiling Be parallel to the horizontal sections of the guides 3 can be provided working.

On the pointing in the closing direction, in Fig. 1 under the most panel edge 2 'of the door leaf 2 , an overall designated 5 accident protection bar is provided, which extends in a known manner across the width of the door leaf and is thus able to overcome obstacles practically the entire width of the door opening. Such a shortened in Fig. 2 reproduced accident protection strip 5 can be designed as a rubber profile and generally consists of a U-shaped support profile 6 , between the legs of a Verfor mungsraum 7 is formed. The walls 8 of the angle of the support profile 6 continue in the corner areas over the connecting web wall of the profile in addition in outer walls, each of which tubularly enclose a cavity 10 . In the attached state, there is a cavity 10 in the respective lower corner area in the inside and outside of the door leaf. For the tension-tight closure in the closed state, a lip 11 is formed on the outside of the outer walls 9 of the cavities 10, which lip adjoin the outer surface of the walls 8 of the legs of the profile 6 . The bar 5 thus consists in one piece of the U-shaped support profile 6 , the cavities 10 surrounding the outer walls 9 and the lips 11th In the example according to FIGS . 2 and 3, the support profile is provided at its free ends with a clip-shaped fixing formation directed towards one another, which, as shown in FIG. 3, engages in corresponding groove-shaped configurations of the bottom gate leaf panel in the fixing state at the lowest panel edge 2 ' barbed there are secured against slipping out.

The in the longitudinal direction of the bar over its entire length extending cavities 10 form slim cylinders, which may have a circular cross section, but this is not necessary, as shown for example in FIG. 3. It should be emphasized that the cross section of the cavities 10 and, in particular, their expansion in the direction of the door leaf movement is substantially less than is the case with the deformation space 7 . This sen sen Figs. 2 to 4 clearly recognize. The cavities 10 are completely enclosed by their tubular outer walls and are hermetically sealed on the end face directed from the drawing plane. In the example lying before, Fig. 2 is intended to indicate that in the other end face region of the cavities 10 facing the viewer, these are connected to connecting lines 13 , which as such can be flexible or in the form of rigid pipelines if the pressure signal Transducer 15 is also located on the under most panel, which is assumed here according to FIGS. 5 and 6. The connecting lines 13 do not have to mend in the end region into the cavities 10 , this can also be done in the area of the outer walls 9 or from the deformation space 7 . It is only important that the cavities 10 are hermetically sealed except for their transition into the associated connecting line 13 .

In principle, it is possible to connect each cavity 10 to its own pressure-signal converter 15 , that is to say to provide a corresponding number of converters 15 corresponding to the number of cavities 10 . However, several or all of the cavities 10 provided, in particular via their connecting lines 13 through a connecting part 14 , which, for example, have two connecting lines 13, are approximately T-shaped and whose single output is connected to the two inputs at the input of the pressure -Signal converter is connected, so there opens into the chamber, as will be described later.

Basically, it is possible to only see a cavity 10 before, also such that it extends flatly over the outside of the connecting web of the U-shaped Tragpro files 6 . However, the cross sections of the cavities 10 are preferably made relatively small. Since the walls 8 of the support profile 6 - as shown in FIGS . 2 to 4 more or less clearly express - are considerably more resistant to bending than the bulging outer walls 9 of the cavities 10 present in the closing direction of movement of the door leaf, will be when an obstacle is encountered in the course of the closing movement, the outer wall 9 of the Hohlrau mes 10 or several of them compressed before the support profile 6 deforms. The compression of the outer walls 9 in the area of impact on the obstacle results in a relatively large change in volume of the cavity 10 to be affected, so that a clear displacement of the medium takes place, the amount of which - as will be described - the pressure-signal converter 15 safely leveled. This leads to the switching off or switching over of the drive motor unit, which, however, cannot prevent a certain caster movement of the door leaf 2 towards the obstacle due to the inertial forces. This caster movement distance is now compensated for by the subsequent compression of the support profile 6 without putting too much strain on the obstacle. The different stiffness of the outer walls 9 and the walls 8 can be herbeifüh ren by shaping different buckling stiffness, for example by bellows formation in the area of the outer walls 9 compared to braced straight the training of the leg walls 8 , but you can also provide different wall thicknesses, as is the case in the exemplary embodiments according to FIGS . 2 to 4 is indicated. The leg walls and / or the web connecting wall of the U-profile 6 can also be slightly bo-shaped. Due to the roundish cross-section shown in the exemplary embodiments, the outer walls 9 contribute to their easier deformability.

The embodiment according to FIG. 3 largely corresponds to the arrangement and the type of fixing on the door leaf as seen in FIG. 2. There is le diglich yet another cavity 10 between the other cavities 10 arranged since Lich. For this purpose, the connecting web wall between the legs of the U-profile 6 is turned downwards, while the deformation space 7 is open at the top and in the supply state by the lower edge of the panel 2 'is attached.

In the embodiment shown in FIG. 4, the U-support profile 6 with its web wall between the legs Lichen the lower edge 2 'of the door leaf and turned to this with the help of screws 16 in a simple manner. The free ends of the legs of the profile 6 therefore protrude from the door leaf in the direction of closing movement. In the end region of the free legs, a cavity 10 with a thin outer wall 9 and a lip 11 are provided. In this formation and arrangement of the bar 5 , the deformation space 7 encompassed on three sides by the U-supporting profile 6 is open at the bottom. The rigidity of the walls 8 of the legs determines the deformation force in the wake phase of the door leaf.

FIGS. 5 and 6 show a possible method of affixing the pressure-signal converter 15, namely at the te by the indicated hinge connection 17 between the lower most and the superjacent panel on the door leaf inner side 18 of the lowermost Paneeles near the Unterkan 2 '. Depending on the design of the door leaf, it is conceivable to move the pressure signal converter entirely or partially into the interior of the door leaf. Should the accident protection strip 5 extend into the side area outside the door opening, the pressure-signal converter 15 could also be accommodated within the U-shaped support profile in such edge areas in which an obstacle cannot occur.

The pressure-signal converter is housed in a housing 19 which is only indicated in the drawing. This Ge housing is fastened to the bottom panel 2 of the door leaf. Inside the housing is the Kam 20 , the inner surface of which forms a tubular guide 21 . The chamber 20 can have the overall shape of egg nes pipe piece. The tubular chamber 20 is arranged at an angle of 45 ° to the horizontal, in such a way that the lower end face 24 of the chamber 20 maintains its lower position in any possible operating position of the door leaf or the bottom panel 2 . Fig. 5 shows the position of the bottom panel 2 of the ceiling sectional door shown as a game in a position of the door leaf just before the closed position. Fig. 6, on the other hand, shows the position of the bottom panel 2 in the open position, so if the entire door leaf and thus the bottom panel is aligned in an approximately horizontal position. Due to this oblique arrangement of the chamber 20 , a switch body 25 guided in it on the inner wall guide 21 is always acted upon by its gravitational pull into its operating setting position, ie in contact with the inner surface of the end face 24 .

Fig. 7 shows an enlarged sectional view around the lower end portion of the chamber 20 in the La ge, as shown in Fig. 5. The Schaltkör by 22 can be formed, for example, as a ball or otherwise as Kör, which is roughly playful in the guide 21 of the chamber 20 is movable. In the present case, the switching body 22 has a circular cylindrical shape in its downward-facing area, the lateral surface of which decreases in an arc toward the top and ends in a central tip. In the cylinder extend longitudinally over the circumference - here four ribs 23 - which rise slightly above the outer surface of the switch body, so that relatively wide gaps arise between the ribs. From the measurement is made such that the ribs 23 take over the movement guidance by sliding contact on the guide surface 21 , while the gap-shaped spaces between the ribs serve as bypasses for the medium. These se bypasses can be seen clearly also from FIG. 8.

In the lower end face 24 of the chamber 20 , a nozzle opening 25 is introduced centrally, which serves as an opening through which the medium enters the chamber 20 when one or more of the cavities 10 are pressed in. Can see Figures 5 and 6 that 20 a channel 26 is connected to the lower end of the chamber, the other end is led out of the housing 19 and from there to a line 13 -. Or the common output of a connecting part 14, not shown - is in communication so that when compressing the or the connected cavities 10, a quantity of medium displaced by the compression is pressed into the channel 26 and thus in front of the nozzle opening 25 . The displaced amount of medium is bundled through the nozzle opening 25 and accelerated accordingly, so that it strikes the underside of the switching body in the direction of the chamber obliquely upwards when it hits the bottom. This displacement distance is limited in a manner not shown, so that over this lifting of the switch body in the chamber 20 a liquid is pressed past the switch body between the sen ribs upwards. The chamber 20 is connected at its upper end to a storage vessel 31 , which allows the medium to pass and the backflow of the medium into the cavity or cavities 10 as soon as their compression is complete and the outer walls 9 return to their original, unloaded form take in.

The signal triggering caused by the movement of the switching body can take place in various ways, here from a wave barrier which is formed from a wave source 29 and from a wave receiver 30 . This barrier lies above the switch body 22 when it is in its illustrated operational setting. If the switching body 22 is raised due to a passage of the medium through the nozzle opening 25 into the chamber 20 from the operating position, it gets into the barrier area and thus interrupts the waveform between the transmitter 29 and the receiver 30 . This interruption is transmitted in a manner not shown to an outside of the gate leaf, also not shown receiver, which evaluates this interruption of the barrier in the sense of an interruption of a closed circuit and the drive motor unit, also not shown, switches off or switches with respect to the direction of movement. These things are well known. For example, a light barrier can be used as a wave barrier, but other wavelengths below and above the visible range can also be used. The Ma material of the wall of the chamber 20 must of course be permeable to the selected energy wave, whereas the switching body forms an obstacle to it. Instead of a wave barrier, a mag netsystem can also be provided, for example, in such a way that a coil is arranged around the chamber 20 , into which the switch body enters when an obstacle is encountered and thus disturbs a set magnetic equilibrium state or even as a magnet a voltage is induced in the coil. The signal can be forwarded out of the housing 19 to the receiver in various ways, in particular via a wire line (not shown), but in principle also wirelessly.

The pressure signal converter works dynamically. As soon as the passage of medium through the nozzle opening 25 has ended, the switching body 22 sinks under the action of gravity into its operating starting position near the end face 24 of the chamber 20 because it forms bypasses for the medium on its outer circumferential surface, that is, it follows the gravitational pull even when the medium is stationary can.

This initially has the advantage that the system is not yet completed. The total of the media space between the suction space 10 which triggers the displacement and the switching body 20 which evaluates this displacement is connected to that which is provided above the switching body. From this space, medium can therefore always flow in the required amount, even with a slight leak, with losses due to evaporation and the like. The storage vessel can then be monitored to ensure that there is always an excess amount of medium. In the exemplary embodiment and in a preferred embodiment of the invention, the medium has a liquid physical state under all operating conditions. This has the particular advantage that displacement losses due to compression of the medium, in contrast to gases, are negligible. In the design of the accident protection strip with the cavities limited only to the front area as displacement triggers and the rest of the profile as a deformation zone for the door leaf wake, the volume in the medium zone is so small that the use of gaseous media is also interesting because of the resulting decrease in compression losses can.

There can be a variety of other, from the Darge presented designs differing training, especially for the shape of the chamber 20 , which has an inclination of about 45 ° only in the event that the location of their attachment in the course of gate leaf movement between the closed position and the open position undergoes a change in position of 90 °. Furthermore, the sensitivity of the switch body can be made adjustable by allowing a spring to act on the switch body instead of or against the force of gravity.

Claims (25)

1. Elastic deformable accident protection strip for attachment to the edge pointing in the closing direction of a driven leaf, in particular a sectional sectional door, lifting gates, rolling gates, single-leaf overhead doors, sliding gates or the like, which has at least one cavity which extends in the longitudinal direction of the strip and at a pressure - Signal converter is connected, which, by displacing a medium located in the cavity when the bar encounters resistance in the course of the closing and, if appropriate, also the opening movement of the door leaf, emits a signal which provides a down or movement reversal circuit of the door leaf drive unit is supplied, characterized in that the cavity ( 10 ) communicates with a chamber ( 20 ) in which a switching body ( 22 ) is displaceably mounted, which in each position of the door leaf ( 2 ) in a determined te, on the connection -Operation ( 25 ) in the chamber ( 20 ) for operational relocation position ( 27 ) is acted upon in such a way that the switching body ( 22 ) is displaced from its operating position ( 27 ) by the medium that is displaced when the bar ( 5 ) is deformed, through the mouth ( 25 ) into the chamber ( 20 ) is moved and moves back into this position when the transferred medium ebbs under its action, which displacement movement of the switching body ( 22 ) detects the criterion for the signal bil. 2. Accident protection strip according to claim 1, characterized characterized that the medium in operation temperature range has liquid physical state. 3. Accident protection strip according to claim 2, characterized characterized that the medium - given if there is water containing antifreeze. 4. Accident protection strip according to one of claims 1 to 3, characterized in that the at least one cavity ( 10 ) is provided on the front region of a support profile ( 6 ) in the closing movement direction and is in particular formed integrally therewith. 5. Accident protection strip according to claim 4, characterized in that two cavities ( 10 ) are provided, one of which is located on the outside of the door leaf ( 2 ) adjacent edge of the support profile ( 6 ) and the other on the inside of the door leaf te ( 2 ) adjacent corner edge of the support profile ( 6 ). 6. Accident protection strip according to claim 4 or 5, characterized in that the supporting profile ( 6 ) is designed to be elastically deformable overall and to the mounting edge ( 2 ') of the door leaf ( 2 ) seen a extending in the longitudinal direction Ver forming space ( 7 ) at least partially comprises, wherein the deformation space ( 7 ) delimiting walls ( 8 ) of the support profile ( 6 ) are stiffer than the outer walls ( 9 ) of the at least one medium receiving cavity ( 10 ). 7. Accident protection strip according to claim 6, characterized in that the support profile ( 6 ) has egg nen overall approximately U-shaped cross section. 8. Accident protection strip according to claim 6 or 7, characterized in that the or the cavities ( 10 ) with the support profile ( 6 ) are integrally formed, the outer walls ( 9 ) of the or the cavities ( 10 ) a fraction of the thickness the side walls ( 8 ) of the deformation space ( 7 ). 9. Accident protection strip according to one of claims 6 to 8, characterized in that the cross-sectional dimension of the deformation space ( 7 ) - seen in particular in the closing movement direction of the door leaf ( 2 ) - is a multiple of that of the or the cavities ( 10 ). 10. Accident protection strip according to one of claims 1 to 9, characterized in that a plurality of cavities ( 10 ) containing the medium with regard to their - in particular from adjacent end faces - connections ( 13 ) to one and the same mouth ( 25 ) in the chamber ( 20 ) of the converter ( 15 ) are brought together. 11. Accident protection strip according to one of claims 1 to 10, characterized in that the pressure-signal converter ( 15 ) on the door leaf ( 2 ) - in the case of a multi-part version, in particular the strip ( 5 ) having bottom part - fastened and with or the cavities ( 10 ) is connected via a pipe or hose line ( 13 ). 12. Accident protection strip according to one of claims 1 to 11, characterized in that the switching body ( 22 ) is designed as an independent, in this respect, in the chamber ( 20 ) overall movable part. 13. Accident protection strip according to claim 12, characterized in that a roughly playful guide ( 21 , 22 , 23 ) is formed between the chamber ( 20 ) and the switching body ( 22 ). 14. Accident protection strip according to one of claims 1 to 13, characterized in that the switching body ( 22 ) is spherical or at least partially circular cylindrical with its cylinder longitudinal axis pointing in the displacement direction. 15. Accident protection strip according to one of claims 1 to 14, characterized in that the switching body ( 22 ) is provided with ribs ( 23 ) projecting outward from its surface or inwardly directed recesses which are in the direction of displacement of the switching body ( 22nd ) extend and form bypasses for the medium located in the displacement direction above and below the switch body ( 22 ). 16. Accident protection strip according to one of claims 1 to 15, characterized in that the switching body ( 22 ) is acted upon by gravity upon the assumption of its operating position ( 27 ). 17. Accident protection strip according to one of claims 1 to 16, characterized in that the movement distance of the switching body ( 22 ) is arranged obliquely to the horizontal. 18. Accident protection strip according to claim 17, characterized in that the inclination of the movement path of the switching body ( 22 ) to the horizontal is approximately 45 °. 19. Accident protection strip according to one of claims 1 to 18, characterized in that the chamber ( 20 ) has the shape of a tubular guide ( 21 ) for the switching body ( 22 ). 20. Accident protection strip according to one of claims 1 to 19, characterized in that the switching body ( 22 ) - optionally in addition to gravity - is acted upon by the force of a spring in its loading position ( 27 ). 21. Accident protection strip according to one of claims 1 to 20, characterized in that the mouth ( 25 ) of the chamber ( 20 ) - in particular in the Bo den end face region ( 24 ) of the tubular guide ( 21 ) - is designed as a nozzle. 22. Accident protection strip according to one of claims 1 to 21, characterized in that the switching body ( 22 ) in one of its offset positions ( 27 , 28 ), in particular when moving out of its operational offset position ( 27 ), the interrupter member egg ner light or Wave barrier ( 29 , 30 ) forms. 23. Accident protection strip according to one of claims 1 to 21, characterized in that the switching body ( 22 ) is designed as part of an electrostatic or electromagnetic field sensor. 24. Accident protection strip according to one of claims 1 to 23, characterized in that a storage vessel ( 31 ) for the medium is provided above the chamber ( 20 ) or the tubular guide ( 21 ). 25. Accident protection strip according to one of claims 1 to 24, characterized in that  in the area of the storage vessel or in its inlet to the chamber is a sensor for the level of the medium is provided.