DE8421051U1 - Spring monitoring device - Google Patents

Description

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The invention relates to a spring monitoring device with the features of the preamble of claim 1.

This spring monitoring device has a tension sensor provided, which is located in the area that holds one end of the preloaded torsion spring. The spring presses too the force, which corresponds to their tension, via a bolt or the like to a stop and snaps with this Spring end back when the spring breaks. If you assign support surfaces on the holding device in both directions of movement, i.e. system under pressure with an unbroken spring and movement of this system in the opposite direction in the event of a spring break, then the pressure changes occurring there can be recorded and converted into signals, for example through the use of strain gauges. These change at low expansion or compression their electrical resistance and can thus convert a voltage change in the holding area into an electrical signal. In another version, the movement of the end of the spring can occur if the spring breaks to be exploited ·, a mechanical? Trigger motion transmission, for example the operation of an electrical switch, a pneumatic or hydraulic switch Pressure transducer and the like. This movement of the spring end in the event of a spring break can in particular also be immediate when the tension sensor is designed as a mechanical lock bar can be used to trigger a door leaf movement or to prevent it from moving by means of an interception device.

A special case of the 'in question' Torsion springs are the compression of the weight of one

Dipl.-Ing. Otto Huegel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimaslr. 81, D-8 Munich 81

HÖRMANN KG Brockhagen

12,537

at least in parts between the closed and the open position for example vertically moving door leaf, which can be designed in one or more parts, i.e. an overhead door, a roller door, a lifting door or the like. If there is a risk of the door leaf falling, i. H. Break in that Weight compensation device or drive device, make sure that the movement of the door leaf is stopped as soon as possible. Slack rope monitoring devices are used for this used, and centrifugal air-termination systems have also been proposed. The disadvantage a Schi äffsei 1 - interception device is that at Arrangement of several torsion springs to compensate for the Door leaf weight on a common continuous Torsion shaft, which carries cable drums at both ends, on each of which a rope can be wound and unwound, one end of which is on the associated side area of the lower edge of the door leaf or the like is set, the breakage of only one of the torsion springs relieves the tension in the ropes is not reduced enough to trigger the safety gear monitoring the rope tension. Cürch the break of one of the torsion springs is the equilibrium ratio between spring force and door leaf weight so disturbed that the door leaf accelerates downwards, which means that the fall distance from the spring break is carried out relatively quickly will. This is at least undesirable. Centrifugal-controlled air-termination systems only respond when that the falling door leaf has traveled a certain distance, which is usually greater than permitted.

A voltage sensor used for such purposes can be designed in such a way that the spring break detected by this clearly to block the door leaf movement is exploited. This can be done * that a signal of the type mentioned to actuate a

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Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Siiger, patent attorneys, Cosimastr. 81, D-8 Munich 81

HÖRMANN KG Brockhagen

12,537

especially provided in the lower door leaf area catching device is used, which is then triggered in particular electrically, pneumatically or the like. In a preferred embodiment, the tension sensor is designed as a mechanical locking mechanism such that the monitored spring end moves a mechanical member, such as a bolt, over a distance in the event of breakage by reaction force, whereby a catch member is released which is responsible for blocking the door leaf movement, in particular for blocking the rotational movement of the torsion shaft, engages another component. The catch member can be used as spring-loaded for this purpose, pivotally mounted pawl be formed, which when released under spring force in a Sperrkli ⁿ Kenrad engages the rotationally arranged on the torsion shaft is L. In unbroken spring is this pawl by d - s mechanical locking or the bolt is held in its operative position out of engagement with the ratchet wheel.

Air-termination systems are generally constructed so that the catching member in the catch position in engagement with a component, for example a perforated strip - arrives and thus prevents the closing movement of the door leaf, while a The door leaf movement is not blocked in the opening direction takes place, d. H. the catch member springs back from the catch position in this latter movement. The one described above Ratchet ratchet safety gear works as well, the teeth of the ratchet wheel are sawtooth-shaped and urges the pawl into the disengaged position in the direction of rotation associated with the opening movement of the door leaf.

If the torsion spring breaks, the form-fitting engagement is achieved of the catch member immediately initiated, and the

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Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81

HÖRMANN KG Brockhagen

12,537

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Positive locking between the catch member and the component or the pawl and the ratchet wheel has a sudden effect, so that counter-movement phenomena occur in the opening direction, which in this respect cancel the catching state and cause the moving parts to "flutter", possibly even the catch pawl slipping into the next catch opening to lead. If the safety gear is arranged in the form of a pawl and ratchet wheel on the torsion shaft, on which the drums for the supporting cables of the door leaf are arranged in a rotationally fixed manner and in which the torsion spring is inserted Torsional stress required to compensate for the weight of the door leaf initiates, reaction movements occur when the spring breaks, which is due to the elasticity and inertia of the connected Components can lead to pendulum movements and thus also to reverse rotation movements of the cable drums. It it has been observed that the rope can jump off the drum or move to one of the drum's neighboring tracks offset, which leads to a further lowering of the door leaf, since the drums are due to the balance of the force-displacement characteristics the springs are conical. If the door leaf is lowered on one side, this can jam, so that it is very difficult to move the door leaf out of this position, even if it is only for the provisional Actuation until the broken spring is repaired.

The invention is based on the object of a spring monitoring device to create with an interception device of the type mentioned * in which the interception of the door leaf after The shortest possible fall path is more precise and reliable.

Based on an interception device with the characteristics of The preamble of claim 1 fulfills this task

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Dipl.'lng. Ollü wing, dipping. Maiirrcd Siigcr, I'ulcntunwilltc, Cosimastr. 81, ItM! Munich 81

HÖRMANN KG Brockhagen

12. S37

duly solved by its identifier.

By designing the attack or engagement between the catch member and the component in such a way that their relative movement to one another is prevented in both directions, one achieves that pendulum movements are kept away from the door leaf or the elements holding it. this applies both for the arrangement of the catching device or a part of the same ^ for example the catching member * on the Gate leaf itself as well as in the event that the catching device on the torsion shaft near one end of the to monitoring torsion spring is arranged. The catch member can be a translationally or rotationally movable member, the component moved relative to it can be an elongated bar or a wheel. In principle, it is possible to design the catching device to work in a non-positive manner, but form-fitting engagement between catching member and component is usually provided. When the catching device is arranged on the torsion shaft, it is achieved that the one on the torsion shaft torsion-proof arranged cable drum after engagement of the catching device in the catching position no movements can perform more, in particular not in the opposite direction of rotation to the opening movement of the door leaf, whereby a Avoid lifting the rope out of the drum rings will .

In the case of a positive engagement, the Engaging surfaces of the catch member and the component or the catch pawl and the ratchet wheel selected so that forces exerted on these flanks the catch member as far as possible in the catching position, and in both possible relative directions of movement. This applies to both the translatory and the rotatory training of the catch member. When training the

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Dlpl.-lng. Otto Flügel, Dipping * Manfred Sngcr ₄ Patent Attorneys, Cosimastr. 8I ₁ D-8 Munich

HOFMANN KG Brockhagen

12,537

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Catch member as a pivotable catch pawl, the position of the pivot axis is to be selected in such a way that forces exerted on the catch pawl through engagement in the component or the ratchet wheel result in a torque about the pivot axis, which acts on the lever in the catch position ₄

In a conventional design of the catch member such that a prevention of the relative movement between the catching member and the component only in the direction of the closing movement of the door leaf becomes effective, it is possible, after a spring break, to lift the door out of the catch position and move it into the open position. One On the other hand, movement back into the closed position is the opposite not possible. In practice, this is often very cumbersome In order to still be able to move the door leaf in any opening direction, an unlocking device is preferred provided, which enables a targeted transfer of the catch member into the operating position. This allows Spring break a door leaf can be opened and closed by the time it is repaired - for example with the help of a forklift. There of several torsion springs usually provided, in any case only one breaks initially, you have the Possibility to specifically release the interception device assigned to the broken spring.

These and further embodiments of the invention emerge from the subclaims, in particular in connection with the exemplary embodiment reproduced in the drawing, the description of which follows the Invention explained in more detail.

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DipL'lng, OtIo Flügel, DipL-lng, Manfred Siigcr, patent attorneys, Cosimastr, 81, D-8 Munich 81 HQRMhNN KG Bföcknägefi 12. §37

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It 2, -own:

Figure 1

Figure 2

Figure 3

a plan view of the exemplary embodiment in the direction of line I-I in Figure 2, at which the catching device is arranged on the torsion shaft;

a section along the line H-II in Figure 1 with the catch in the operating position;

a section corresponding to the illustration according to Figure 2 with located in the catch position Latch.

The figures show a lateral end area of a torsion spring To rbl att weight compensation device again, as in the context of, for example, a Roller shutter or ceiling sectional door is used. One has to imagine that the shaft holder designated 31 at the other end, not shown, of the torsion shaft 32 is in mirror-symmetrical training. At least two torsion springs are held on the torsion shaft, the springs facing the center of the shaft Area there connected to the torsion shaft in a torsion-proof manner are. Only one attached to the shaft bracket is shown subsequent area of one of the torsion springs 33. This The area of the torsion spring 33 is not shown in any further detail Way held on an internal spring holding body 43, the end of the, not shown Torsion spring 33 have decreasing diameter can and thus has the shape of a cone. The spring holding body 34 can be rotated on the torsion shaft 33 stored. In the area of the bracket and thus in the side

Dipping. Otto Flügel, Dipl.-tng, Manfred Säger, patent attorneys, Cosimustf. 81, D-8 Munich 81

HÖRMANN KS Brockhagcü 12,537

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Chen end region of the torsion shaft 32, a cable drum, not shown, is arranged in a rotationally fixed manner. To this The rope drum is a rope that is also not shown up and unwindable, which with its free end in the un ^ lower side edge area of a door leaf, which is also not shown, is set. That the pen holder body 34 facing end 35 of the torsion spring 33 is hooked into a fastening tab 36, which in turn is so attached to the spring holding body 34 that the spring end 35 is not out of this attachment to the Spring holding body 34 can free.

Between the cable drum, which can be seen in Figure 1 on the right arranged by the shaft holder 31 has to present, and the spring holding body 34 is a ratchet wheel 37 with the aid of screws 38 so that it cannot rotate on the torsion shaft 32, as can also be seen in FIGS. 2 and 3. A catch pawl 39 is assigned to the ratchet wheel 37, which is mounted pivotably about a pivot axis 40 (Figures 2 and 3), which is at both ends in the area the leg of a bow-shaped holder 41 is fixed. The bow-shaped holder 41 is with the help of connecting webs 42 braced in its thigh area and firmly connected to the shaft holder 31, see below among other things with the help of screw connections 43 in the area of the shaft bearing of the shaft support 31. The shaft support 31 and the bow-shaped holder 41 are anchored to the wall above the gate opening to be closed,

The pivot bearing of the catch can be shock-absorbent be executed, namely in the area of the bearing of the catch pawl itself or in the area of the bracket Swivel axis. In the illustrated embodiment is the catch 39 with the help of a torsion spring 45,

Dipl .-! Ng. Otto Flügel, Dipl.-Ing. Manfred SSger, patent attorneys, Cosimastr. 81, D-8 Munich 81

HÖRMANN KG Brockhagen 12,537

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which is wound around the pivot axis, in the direction biased to take up the catching position (Figure 3) pressure loaded. Instead of a torsion spring can also find another spring, in particular a helical spring use, which in a known manner against the side Breaking out is prevented by a telescopic guide, so that it still works reliably even after a break.

The spring holding body 34, which is freely rotatably mounted on the torsion shaft, has bolts 46 in two diagonally opposite edge areas, for example screw bolts, which protrude axially parallel to the torsion shaft 32 towards the ratchet wheel 37 and are recessed at corresponding points in the adjacent leg of the bow-shaped holder 41 , elongated holes 57 - FIGS. 2 and 3 - extending in the circumferential direction around the shaft. Bolts 46 are each provided with a collar in their end region facing the spring holding body 34, said collar engaging over the edge regions of the respectively associated elongated hole. From its free end, retaining plates 47 are placed on the bolts, which are also the edge areas of the Overlap elongated holes from the other side, so that the bolts 46 are secured against sliding out of the associated elongated holes 57, with play, so that they can move within the elongated holes. The freely tapering end areas 48 of the bolts 46 protrude so far into the space between the legs of the bow-shaped holder 41 that one of them on one Form 49 of the catch pawl 39 comes to rest, as can be seen in particular from FIGS. 2 and 3 is,

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Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81

HÖRMANN KG Brockhagen

12,537

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FIG. 2 shows the catching device in the operating position, that is to say when the spring tension or spring preload is present. When the torsion spring 33 is unbroken, the end shown is supported in a stationary manner via the spring holding body 34 and its bolt 46 in one end region of the elongated holes 57 and thus on the bracket-shaped holder 41 in the installed state. The area of the leg of the bow-shaped holder 41 in which the elongated hole 57 closest to the catch pawl 39 is located is referred to as the holding area 58. In this position with the spring unbroken, the catch pawl 39 is supported via a latching surface 59 of the projection 49 on the bolt 46 closest to the catch pawl, as shown in FIG. In this operating position, the catch pawl 39 is out of engagement with the ratchet wheel 37. The torsion shaft 2, the ratchet wheel 37 fixed on it and the pulley also attached to this can rotate under tension and relaxation of the torsion spring, so that the one held on the rope Door leaf between the open and closed position, for example by a drive, can be moved. When the torsion spring stops 33, the spring holding body move 34 and thus the bolt due to the reaction force of the spring depending on the spring tension more or less violently from the position shown in Figure 2 system at the one end aar slots to its other end "out, as shown in Figure 3 is reproduced. The bolt 46 closest to the catch pawl 39 thus releases the latching surface 59 so that the catch pawl 39 can move under the force of the spring 45 to engage the ratchet wheel 37. Due to the breakage of the torsion spring 33 and the torque that is exerted on the torsion shaft 32 via the cables and the cable drums, this and thus the ratchet wheel rotates counterclockwise in the example shown.

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Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81

HÖRMANN KG Brockhagen

12,537

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sense until the catch 39 can snap into engagement with the ratchet wheel. Because of the relatively large Number of intervention points of the The ratchet wheel 37 can only turn the torsion shaft 32 Twist by a relatively small angle, so that the door leaf, whose weight is now no longer full is koaipensi ert by the spring force, can only move a little fleas downwards. The forces suddenly released in the event of a spring break cause the bolts 46 do not remain in their position shown in Figure 3, but rebound. In a similar way, the torsion wave is due to the connected components If the torsion spring breaks, more or less uncontrollable movements can be carried out, even from the point of the Spring break are dependent. In this case there is the risk that the cable drum stopped abruptly by the catching device through the door leaf springing back over the cables can rotate backwards, as a result of which conditions occur that cause the ropes to jump off the associated Rope drum or at least a relocation of these ropes to a different track. this can also only occur with regard to one of the ropes and the associated rope drum. The interception system of the However, the type claimed here prevents such a reverse rotation possibility in that the locking engagement takes place in both directions of rotation of the ratchet wheel. In this way, the aforementioned disturbance phenomena can be prevented.

The rebounding bolt 46, that of the catch pawl 39 is adjacent, it must not come out again into the operating position or out of engagement with the ratchet wheel 37 * For this reason, in the area of the projection 49 of the catch pawl 39 is an in the movement path

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Dipl.-Ing. Otto Flügel, Dip! - Ing. Manfred Säger, patent attorneys, Cosimastr. 81, D-8 Munich 81

HÖRMANN KG Brockhagen 12,537

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of the bolt 46 facing impact surface 60 is provided which the bolt 46 strikes in a backward movement, with regard to the geometric arrangement in such a way that that a torque is exerted on the catch pawl about its pivot axis 40, which the catch pawl into the In Figure 3 reproduced catch position applied. This means that the catch position of the catch pawl 39 once assumed is also independent of the subsequent movements of the bolt 46.

Immediately after the spring break, the catch pawl is out of position at the first displacement movement of the bolt 46 unbroken spring transferred out into the catch position and another movement of whatever kind Torsion wave and thus the cable drum intercepted.

The embodiment shown here works with a tension sensor as a mechanical lock in the form of the bolt 46 and the catch pawl 39. If the catching device is not arranged in the vicinity of the spring end to be monitored, for example in the region of the door leaf, an electrical, pneumatic and hydraulic switch is arranged in the holding region 58 or else a strain gauge is attached, which indicates the displacement movement of the bolt 46 and in a trip signal for the interception system. In this way, catching the door leaf can be achieved directly in the event of a spring break, for example.

A door leaf caught in the event of a spring break should still be - for example with the help of a forklift or the like open and close until the spring break is resolved. For this purpose the pawl must be disengaged be brought with the ratchet wheel, this and

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Dipl.'lhg, Olio Flügel, Dinting. Manfred Siiger, Pulcntantoiilte, Cosimuslr, 81, D * 8 Munich 81 HuRMANN KG Bröcknägen 12,537

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so that the torsion shaft and the cable drums can rotate * For this purpose an unlocking device is provided which comprises a shaft 63 mounted on the bracket-shaped holder 41 on which in the area of the Catch pawl a cam 62 is held in a rotationally fixed manner. With With the help of a handle 64, the shaft and thus the cam 62 pivot. The cam 62 acts on a return projection 61 that is assigned to the pawl or is formed on this. As indicated by dash-dotted lines in FIG. 3, it can therefore be pivoted of the lever 64 of the cams 62 against the return lug 61 move and takes it with it, as a result of which the catch pawl 39 is forcibly transferred into its operating position. Mostly are more than one torsion spring on the torsion shaft arranged. Since each of these springs must be monitored, a corresponding number of interception devices are provided. To move the door leaf when a spring breaks, all of these catch pawls must be disengaged the associated ratchet wheels are brought. For this reason, the shaft 63 is the unlocking device out parallel to the torsion shaft 32 over all the interception devices, it carries as many cams how catches are available, and of course with the appropriate assignment.

As can be seen from the figures of the exemplary embodiment, in particular FIGS. 2 and 3, the ratchet wheel is Divided diagonally into two halves, which can be put together with the help of connecting flanges. This enables this spring monitoring device with an interception device to be retrofitted. The bracket ^ shaped holder 41 comprises the catch pawl 39 with its spring and the associated part of the unlocking device. This makes it very easy in terms of assembly

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DipUng. Otto Flügel, Dipl.-Ing * Manfred Sitgc ^ Patent Attorneys, Gosimastr. 81 ₍ D-8 Munich 81

HuRnANN Ku BrucknSgefr 12. §3 /

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Way, it is possible to arrange the entire monitoring device on an existing torso wel1e at a later date. For this it is only necessary to use the spring holding body 34 to be released from its previously existing connection with the shaft holder 31. The screw connections 43 and the bolts 46 are axially aligned with one another, so that now in the released spring holding body, which is shown in FIG. gur 1 is shifted to the left, the bolts 46 can be inserted into the same openings through which the The spring retainer body was connected to the shaft retainer, Thereafter, in the space thus freed up between the spring holding body 34 and the shaft holding device 31 the torsion shaft the two-part ratchet wheel 37 is placed and fastened as well as via the screws 38 with the Shaft connected in a torsion-proof manner. Thereafter, the bow-shaped holder 41 with the catch pawl 39 is receiving the ratchet wheel between them in the one shown in FIG Position brought and with the shaft holder or the Wall connected at the installation site. The spring holding body 34 is now inserted with its bolt 46 into the elongated holes 57 and there with the aid of the holding plates 47 fixed. In this state, the end region 48 of the one bolt 46 engages the latching surface 59 of the Operating position swiveled back spring pawl. The system is now ready for operation.

As can be seen in particular from FIG. 1, the bow-shaped holder is in relation to its legs parallel and centered between these planes running mirror-symmetrically. Just the arrangement the spring 45 can be excluded. The elongated holes 57 are fitted congruently in both legs. This bow-shaped holder can thus be used with all of its parts for both left-sided and use for right-hand attachment to the shaft bracket

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Diplrlng. OUo wing, Dipl.-Ing, Manfred Säger, Patontunwiilte, Cosimastr. 8I _S D-8 Munich 81

HÖRMANN KG Brockhagen

12,537

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the. This means that one and the same device can optionally be used for one of the torsion springs 33 of the torsion shaft 32 can be used.

In order to ensure the positive engagement of the catch pawl 39 in the ratchet wheel 37 so as to ensure that also from there from no force is exerted on the catch pawl 39 in the direction of movement into the operating position has, the tooth flank surfaces 56 of the teeth 54 of the Ratchet wheel designed accordingly, either in the direction of the radius of the ratchet wheel or still better undercut to this radial direction. In the present example, a rectangular tooth gap was created

55 provided, that is, compared to the radial in each case Tooth flank surfaces running in the direction of undercut

56 conditional.

The nose 51 of the catch pawl 39 engages in these tooth gaps, in a first embodiment with nose surfaces 53 provided, which in the catching position approximately parallel to the Tooth surfaces 56 run. In the present example, the catch pawl 39 is provided with a groove-shaped recess 50, the side surfaces 52 of which are approximately parallel in the catch state run to the tooth flank surfaces 56. So it will be a Tooth 54 of the ratchet wheel 37 received in the groove 50 of the catch pawl and thus a locking of the ratchet wheel against Rotational movements achieved in both directions of rotation.

Claims (1)

Dipl.-Ing. Otto Flügel, Dipl.-Ing. Manfred Siiger, patent attorneys, Cosimastr. 81, D-8 Munich 81 Hörmann KG Brockhagen - 1 - 12.537A Steinhagen / Brockhagen SPRING MONITORING DEVICE Claims ]. Spring monitoring device for a pre-tensioned torsion spring (torsion spring) of a gate of a door or the like, in particular as a weight balancing spring for a one-part or multi-part overhead movable door leaf, a rotary door armor or a lifting door leaf which has a tension sensor in at least one of the two end areas of the spring, which is provided in a holding area acted upon by the bias of the spring and is in control connection with a catch element that can be moved between an operating position and a catch position so that it is held in the operating position when the spring tension is present and released in the direction of the catch position when the spring tension disappears (spring break) is, in which the catch member engages on a relative to this in the course of the closing and opening movement of the door leaf held back and forth movable component and the closing movement of the door leaf corresponding relative movement is designed to prevent, there characterized in that the catch member (39) has two clamping jaws that engage the component (37) in a force-locking manner in opposite directions or with two catch surfaces (51; 52) is designed to engage positively in the component (37). 2. Device according to claim 1, characterized in that the catch member (39) with a nose (51) is provided, which in the catch position in at least one of a number of , (- tid3W ^ t ^ * «« ^^ Dipl.-Ing. Olio wing, Dipl.-Ing. Manfred Süger, patent attorneys, Cosimaslr. 81, D-8 Munich 81 Hörmann KG Brockhagen - 2 - 12.537A Catch recesses (55) engages, which is formed in the component (37) and in both directions of the Has relative movement catch surfaces (56), which the each facing nose surfaces (53) are opposite. 3. Apparatus according to claim 2, characterized in that the catch member is designed as a catch pawl (39) and the component is designed as a ratchet wheel (37), the eirsn meandering tooth (54) - tooth gaps (55) - has circumferential profile. 4. Apparatus according to claim 3, characterized in that the circumferentially facing tooth surfaces (56) are designed to run in the diameter direction of the ratchet wheel (37). 5. Apparatus according to claim 3, characterized in that the circumferential direction facing tooth surfaces (56) are designed to run undercut with respect to the diameter direction of the bevel wheel (37). 6. Apparatus according to claim 5, characterized in that the tooth gaps (55) of the ratchet wheel (37) are rectangular as seen in the axial direction. 7. Apparatus according to one of claims 3 to 6, characterized in that the nose f51) of the catch pawl (39) has nose surfaces (53) pointing in the circumferential direction of the ratchet wheel (37) which, in the catch position, relative to the respective adjacent tooth surfaces (56 ) are designed to run approximately parallel. I φ
• * 4 * iJipl.-lng. Otto Flügel, Dipping, Maiil'rcd Siigcr, Patentanwälte, Cosimuslr, 81, D-8 Munich 81 HÖRMANN KG Brockhagen 12,537 8i device according to one of claims 3 to 6, characterized in that the catch pawl (39) has a groove-shaped recess (50) running in the axial direction of the ratchet wheel (37), in which a tooth (54) of the ratchet wheel (37) engages in the catching position and whose side surfaces (52) pointing in the circumferential direction are designed to run approximately parallel to the respective adjacent tooth surfaces (56). 9. Device according to one of claims 1 to 8, characterized in that the catch member, or the catch pawl (39) is designed as a pivotably mounted lever. 10. Device according to one of claims 1 to 9, characterized in that the catch member or catch pawl (39) is designed to be spring-loaded (45) in the direction of its catch position. 11. Apparatus according to claim (9), characterized in that the catch member or catch pawl (39) has a recess (49) with a latching surface (59) on which, in the operating position of the catch pawl (39), a mechanical member (46) a tension sensor designed as a mechanical lock rests on the one hand on the one end (35) of the torsion spring (^ 3) and on the other hand is supported under the tension of the unbroken spring (33) on a stop of the holding area (58) and that with spring breakage is guided movably over a certain distance from the stop. Dipping, Otto Flügel, Dipping, Manfred Säger * Patent Attorneys, Cosimastr, 81, D-8 Munich 81 HÖRMANN KG Brackhagen 12,537 12. Apparatus according to claim 11, characterized in that the guide over the displacement path is formed by an elongated hole (57) in the holding area (58). 13. Apparatus according to claim 12, characterized in that the formation (49) has a baffle surface (60) which, in the catching position of the catch pawl (39), lies opposite the mechanical member (46) moved by the stop in its return direction of movement. 14 device is mounted on the torsion shaft (32) according to any one of claims 1 to 13, characterized in that the ratchet wheel (37) rotationally fixed to the other end of the torsion spring (33) rotationally at least in the operating state held _ä is that with the shaft (32) at least one of two drums is rotatably connected, on which the other end is held with the door leaf or RoI1tor-Panzer, preferably on its lower area in the closed position, connected rope, chain or the like power transmission member and that the catch pawl (39) is mounted on a bow-shaped holder (41) which holds the ratchet wheel (37) between itself and which, viewed in the axial direction of the torsion shaft (32), is to be inserted between the torsion spring (33) and a shaft holder (31) carrying a torsion shaft bearing is. 15i device according to one of claims 3-14, characterized in that the ratchet wheel (37) is diagonally divided. 16. Device according to one of claims Tl to 15, characterized characterized in that the mechanical link as Dipping. Otto Flügel, Dipl.-lhg, Mniifreil Siigcr, patent attorneys, Cosimastf, 81, D-8 MUrtchcn 81 HQRHANN KG Brockhagen 12-537 Bolt (46) is formed, which at one the end (35) of the torsion spring (33) holding onto the torsion shaft (32) rotatably mounted, possibly conical trained spring holder body (34) is attached, from there the elongated hole (57) in the holding area (58) of the bow-shaped holder (41) reaches through to which the Toris spring (33) facing away from the holding area (58) by a holding plate (47) against sliding out is secured from the elongated hole (57) and has a protruding end region (48) which the catch pawl if the torison spring (33) is not broken (39) in the operating position holding on their locking surface (59) attacks. 17. An apparatus according to any one of claims 1 to 16, characterized in that the catch element or the catch pawl (39) is mounted impact damped, for example over a damping bush having an annular region of rubber or the like, or fumes through ged? Slide mount on the component (41) having the holding area (58). 18. Device according to one of claims 1 to 17, characterized in that an unlocking device (61-64) is provided which is adjustable between a rest position and an unlocked position and in the latter with a locking member (62) on the catch member or catch pawl (39) attacks them by transferring them to their operating position and holding them there. 19. Apparatus according to claim 18, characterized in that the unlocking device (61 - 64) has a shaft? 63) Dipl.-ltig. OtIo wing * DipL-Ing, MiInO ¹ Cd Siigcr, I'alcntanwiillc, Gosimastf. 81, D-8 Munich 81 HGRMÄNN KS Srockhagsn 12, -53 -S- with at least one cam (62) as an unlocking member * which is attached to a return attachment (61) the catch pawl (39) engages. 20. Apparatus according to claim 18 or 19, characterized in that in the case of several catch members or catch pawls (39) for each of which an unlocking member (62) is provided, all locking members (62) being held on a common actuating member (63,64) . 21. Device according to one of claims 1 to 2Ö, characterized in that a supply current switch is provided for an electric door leaf drive, the actuating member of which is an Actuate gu.ngsf 1 surface of the mechanical member or bolt (46) or the catch member or the catch pawl ( 39) is arranged opposite »